Power Density Values Research Articles

Utilization of spray pyrolyzed porous nickel cobaltite electrode as an advanced material for NiCo2O4@Graphite asymmetric supercapacitor device

Nickel-based probe ingredients are vastly promoted in energy storage devices due to their simply variable structure, greater electrochemical movement and nominal noisomeness. In the existing manuscript, we did a comparative study of spray pyrolyzed nickel oxide and nickel cobaltite thin film electrodes and their asymmetric supercapacitor devices for supercapacitor applications. In a three-electrodes arrangement, pristine nickel oxide shows a maximum specific capacitance of 397.10 Fg−1 at 0.002 V scan rate with 86.40 % retention after 5000 cycles. The same electrode shows the values of energy density and power density 45.16 Whkg−1 and 05 Wkg−1 respectively. Nickel cobaltite (NiCo2O4) electrode exhibits the highest value of specific capacitance is 676.82 Fg−1 with 89.23 % retention after 5000 cycles and the values of energy and power densities are 1123.41 Whkg−1 and 5.76 Wkg−1 respectively. The fabricated NiCo2O4@graphite asymmetric device shows a specific capacitance (according to CV analysis) of 495.10 Fg−1. According to the GCD analysis, the NiCo2O4@Graphite device exhibits a specific capacitance of 675.72 Fg−1 and the energy and power densities are 3249.6 Whkg−1 and 10 Wkg−1 respectively. The outcomes show that nickel–cobalt oxide materials play an important role in the field of energy storage.

Carbon Nitride Supported Ultra-fine Bismuth Sulfide Based Supercapacitor for Low Frequency Oscillator Application

In this study, a high temperature in-situ route is reported for the synthesis of one dimensional carbon nitride supported bismuth sulfide nanoparticles. The x-ray diffraction study confirmed the formation of orthorhombic crystal structure of bismuth sulfide with the space group of Pnma (62). The synthesized product was used as an electrode material for supercapacitor application. Electrochemical performance of the three-electrode configuration demonstrated the specific capacitance value of 190 F.g−1 at the current density 1.5 A.g−1. A symmetric supercapacitor device, fabricated using identical synthesized material, resulted a specific capacity of 101.7 mAh.g−1 at 0.02 A.g−1, with energy and power density values of 24.35 mWh.kg−1 and 186.57 W.kg−1, respectively. The symmetric device also exhibited excellent cycling stability that retained 99% of its initial capacity after 500 cycles at 0.12 A.g−1. The coin cell based symmetric supercapacitor can generate the low frequency waveform and functioned as an oscillator.Graphical

Reduced graphene oxide/ Sr2Co2O5 composites as electrode material for supercapacitors

Composites of transition metal-oxides with graphene have grown as potential materials for electrodes, for supercapacitor applications. In this work, Sr2Co2O5 with different percentages of reduced graphene oxide (rGO) (0–15 %) has been prepared by a simple solvothermal technique. The electrochemical performance of composites is examined in comparison with pure Sr2Co2O5. Structural analysis exhibited the orthorhombic structure of Sr2Co2O5 whereas the morphological investigations revealed a variety of morphology for different compositions. The presence of all elements in the parent and derived compositions according to their stochiometric formula is ascertained by energy dispersive X-ray spectroscope. The investigations of electrochemical characteristics revealed the dominant pseudocapacitance behavior in the cyclic voltammetry technique. The value of specific capacitance, energy density, and power density are computed from GCD data. The Sr2Co2O5@15%rGO exposes the highest specific-capacitance of 230.95 F/g at the current density of 0.625 A/g, and high energy and power densities having values of 76.58 Wh/kg and 4.94 W/kg respectively at 12.5 A/g. The solution resistance and ion transportation resistance are examined through electrochemical impedance spectroscopy which exhibits the potential of these composites for supercapacitor electrode material.

Crystal Violet (CV) Biodegradation Study in a Dual-Chamber Fungal Microbial Fuel Cell with Trichoderma harzianum

In the present study, CV dye, known as a recalcitrant dye, was tested for bioremediation via Trichoderma harzianum in a dual-chambered MFC for the first time. Two types of carbon clothes, KIP and CSV from the Dacarb company (France), were tested as electrodes and supported for fungi growth. We first observed that 52% and 55% of the CV were removed by the MFC using KIP and CSV anodes, respectively. The incomplete removal of VC was explained by the relative toxicity of VC to T. harzianum and correlated with IC50 determined as 0.97 ± 0.28 mg L−1 at 25 °C. Furthermore, the MFC working with the KIP electrode was more efficient with a higher maximum power density of 1096 mW m−3 and was only 14.1 mW m−3 for CSV. The MFC experiments conducted on KIP without the T. harzianum biofilm exhibited significantly lower potential and power density values, which proves the electrocatalytic effect of this fungus. These results provide new insight into the development of an effective MFC system capable of direct energy generation and, at the same time, promoting the bioremediation of the persistent CV pollutant.

Application of Cyclic Voltammetry with W Electrodes for Measurement of High CaO Concentration in Molten CaCl2

Molten CaCl2 is a useful electrolyte for certain pyroprocessing techniques, and the solubility of oxide ions in this salt is a critical characteristic of many of these techniques. CaO is a byproduct of direct oxide reduction (DOR), so the concentration of oxide ions can be used to determine the extent of these reactions. Using cyclic voltammetry (CV) with tungsten electrodes, the CaO concentration in the salt up to approximately 5 wt% was correlated to both oxidation peak height and power density values. This correlation was demonstrated in both equilibrium and transient conditions. CV is a promising method for the in situ real-time monitoring of CaO concentrations in DOR processes.

Enhancing Supercapacitor Performance with Cassava Tuber- Bamboo Stem Blended Porous Activated Carbon: An Environmentally Friendly Approach

Supercapacitor electrodes based on porous activated carbon from a blend of cassava tubers and bamboo stems were successfully synthesized using a chemical activation method with a 4M KOH activator. In this study, we characterized the morphological structure of porous activated carbon blended from cassava tubers and bamboo stems using SEM, while the electrochemical performance was tested using GCD, CV, and EIS. The porous activated carbon blend derived from cassava tubers and bamboo stems exhibits a micro-meso pore morphology, resulting in superior electrolyte ion storage capacity when compared to the carbon precursors of cassava tubers and bamboo stems. The porous activated carbon blend from cassava tubers and bamboo stems, serving as a supercapacitor electrode, demonstrates specific capacitance, energy density, and power density values of 43.44 F/g, 4.81 Wh/kg, and 178.64 W/kg, respectively. The CV curve results show that the supercapacitor electrode has EDLC properties, with Rs and Rct of 15.52 Ω and 7.40 Ω. The results of the research provide a valuable contribution to the development of efficient and sustainable electrochemical materials, with potential broad applications in energy storage technologies.

A robust single compartment peroxide fuel cell using mesoporous antimony doped tin oxide as the cathode material.

To date, metal oxide catalysts have not been explored as cathode materials for robust and high-performance single-compartment H2O2 fuel cells due to significant non-electrochemical disproportionation losses of H2O2 on many metal oxide surfaces. Here, for the first time, we demonstrate an acidic peroxide fuel cell with antimony doped tin oxide as the cathode and widely used Ni foam as the anode material. Our constructed peroxide fuel cell records a superior open circuit potential of nearly 0.82 V and a maximum power density of 0.32 mW cm-2 with high operational stability. The fuel cell performance is further improved by increasing the ionic strength of the electrolyte with the addition of 1 M NaCl, resulting in an increased maximum power density value of 1.1 mW cm-2.

An approach to substitute costly-commercial capattery electrodes by activated carbon@Co with advanced retention: Detailed device study supported by DFT investigation

Modern technological development requires researchers to develop cost-effective materials for energy storage/conversion device. The activated carbon, its composite with oxyhydroxide opens new areas for making low-cost commercial sustainable devices synthesized by hydrothermal method. Here, we have broadly compared the different types (Al, Co, Ni) of oxyhydroxide carbon composite for energy storage with detailed theoretical investigations. The detailed DFT simulation is done to see the electronic properties by evaluating the total density of the state and the orbital contribution of the density of the state along with the band structure. The band structure and orbital contribution of DOS show the metallic nature of the CoOOH and the quantum capacitance(QC) obtained for pure CoOOH is 3000 μF. The crucial finding of the research is broad comparative electrochemical performance, with surface area variation for all electrode materials AlOOH@activated carbon, CoOOH@activated carbon, and NiOOH@activated carbon, respectively. The specific capacitance value for otimized CoOOH@activated carbon, from cyclic voltammetry, is 230 F g−1 at 10 mV/s. The bulk and charge transfer resistance calculated for CoOOH@activated carbon (Co@AC) is, respectively 0.82 Ω and 1.18 Ω. The energy, and power density values for CoOOH@AC are 37.34 W h kg−1 and 4200 W kg−1 at a current density of 2 A g−1. The capacitance retention and Columbic efficiency for Co@AC are 72, and 96 % for Co@AC till the last 20,000 segments of GCD. Overall, out of all electrode, the devices with Co@AC electrode shows very promising performance. The fabricated device can glow 26 LED panels for 5 min.

Modulating the structural and magnetic properties of Fe3O4 NPs for high-performance supercapattery and EMI shielding applications

The objective of this article is to meticulously modulate the synthesis parameters of Fe3O4 nanoparticles (NPs) through solvothermal methodology, designed to augment their physicochemical characteristics to enable their application as a high-performance material for microwave electromagnetic interference (EMI) shielding and supercapattery. The microwave dielectric (εr'–jεr″) and magnetic (μr'–jμr″) value is approximately 10.8–j3.9 and 0.73–j0.5, respectively, for the 12-hour (h) synthesized Fe3O4 NPs. Moreover, the dielectric, magnetic, and crystalline characteristics of the 12 h synthesized Fe3O4 NPs exhibit superiority over other variants, resulting in a total electromagnetic shielding effectiveness (EMI SET) of 6.86 dB, which is significantly higher compared to the other samples. In addition, X-band microwave-absorbed materials are evaluated to use them for high-performance supercapattery applications. The 6, 12 and 24 h synthesized Fe3O4 NPs have high retention rates of 95.86, 98.78 and 97.87 % after 1000 cycles at 2 A·g−1 and better Cs values (119.28, 188.262 and 168.89C·g−1 at 2 A·g−1). The 12 h synthesized Fe3O4 NPs show superior power and energy density values for supercapattery performance. It also presents good Asymmetric supercapattery (ASC) Coulombic efficiency maintaining 89.71 % after 5000 cycles at 2 A·g−1. Specifically, introduce a novel two cell battery setup utilizing a Swagelok device. This innovative configuration comprises of Fe3O4 NPs exhibits exceptional storage stability, maintaining its integrity for several seconds (approximately 1–3 s).

Evaluation of Stability of Performance of Electrochemically Exfoliated Graphene for Electrochemical Double-Layer Capacitors

Energy storage devices are known as supercapacitors. One highlighted characteristic of them is high specific power and cycling long-life. These properties are associated with charging and discharging in short periods of time, especially useful for high demanding systems, such as regenerative technologies, strong acceleration in mobility and radical maneuvers in aeronautics. So, market demands for supercapacitors have been growing fastly. The performance improvement and cost reduction of supercapacitors are essential for the popularization of electromobility all over the world. For this aim, graphene and carbon nanotubes, among others, are materials widely used to such proposes due to their high specific surface area and excellent pseudocapacitive and electrochemical double layer properties. In this work, the use of graphene oxide obtained by electrochemical exfoliation and polyvinylpyrrolidone as active mass of supercapacitor electrodes was studied. The electrodes were prepared using the dip coating technique. To characterize the samples obtained, cyclic voltammetry (CV) and galvanostatic charge and discharge (GCD) were carried out in a 3-electrode cell with a 1 M sulfuric acid solution. CV was used to define the potential window, estimate capacitive profile and observe possible faradic phenomena. After that, GCD was used to study the material’s stability during 1000 operation cycles, at three specific current densities: 1.0; 1.5; and 2.0 A g-1. The voltammograms obtained are shown in Figure 1. It was possible to observe a symmetrical voltammogram with discrete quasi-reversible faradic phenomena (pseudocapacitive effects) defined by the cathodic peak at 0.48 V and anodic peak at 0.22 V. These peaks may be related to the redox reactions of graphene oxide. GCD was carried out to evaluate coulombic efficiency and charge retention such as shown in Figure 2. There was no great damage during the cycles; there was a slight positive change (increase) during 1000 cycles for all current densities. Furthermore, an increase in charge retention was observed for all current densities, this effect can be related to elongation of the polymeric chain due to electrostatic interaction of the binder in acidic media, leading to a higher effect of double-layer. For the 1 A g-1 current density, the increase of charge retention and coulombic efficiency were more relevant. These increases may be associated with gradual and discrete pseudocapacitive processes also observed in cyclic voltammetry measurements. The determined values of capacitance, energy and power densities are shown in Table 1. The values obtained at 1 A g-1 specific current density showed a higher coulombic efficiency and a significant increase in charge retention, despite having presented a lower power density. to this material, it is possible to assert to be a working condition better than others. At specific current densities of 1.5 A g-1 and 2 A g-1 higher values of energy and power density were determined, but lower coulombic efficiency. Figure 1

Fabrication of Zr MOF-doped polyvinylidene fluoride membranes and testing in H-type microbial fuel cell

Microbial fuel cells (MFCs) are an important tool that generates electricity from waste biomass. Polymer electron membrane supported dual-chamber MFCs are one of the most tested microbial fuel cells. The most important factor affecting performance in this system is the proton transfer capability of the membrane.In this study, zirconia based metal organic frameworks (Zr-MOF) doped porous membranes were produced, characterized and used in dual chamber (H-type) MFC to generate electricity from animal manure (Cow manure). The effects of MOF ratio on membrane’s physical, chemical properties, and on the cell performance were investigated. The incorporation of MOF into the PVDF matrix improved the water retention property of the membrane. The Zr-MOF addition increased the mechanical strength from 0.55 MPa to 1.52 MPa. The cation exchange capacity increased from 1.04 mmol/g to 2.41 mmol/g. It significantly increased the cell electricity production from 0.186V to 0.49V. The power density values are obtained as 5.02 and 13.8 mW/m2 with the pristine and Zr-MOF(4)-PVDF membranes, respectively.

Fabrication of α-Fe2O3/rGO nanocomposite and its study for electrochemical glucose sensor and supercapacitor application

The demands of electrochemical glucose sensors without enzymes have gained considerable attention in the field of glucose sensors. Therefore, we have fabricated α-Fe2O3/rGO nanocomposite using the biosynthesis method. Syzygium aromaticum (clove) extract was used as a capping/stabilizing agent to synthesize α-Fe2O3/rGO nanocomposite. Synthesized α-Fe2O3/rGO nanocomposite was characterized by Scanning electron microscopy (SEM), Energy-dispersive X-ray spectroscopy (EDS), Transmission electron microscopy (TEM), Powder X-ray diffraction (PXRD), X-ray Photoelectron Spectroscopy (XPS), Brunauer-Emmett-Teller (BET), Fourier transform infrared spectroscopy (FTIR), and UV–visible spectroscopy techniques. The agglomerated rod-shaped morphology of synthesized α-Fe2O3/rGO nanocomposite was observed in SEM micrographs. The Brunauer-Emmett-Teller (BET) analysis shows the surface areas of 187.644 m2/g for α-Fe2O3/rGO nanocomposite. The cyclic voltammetry (CV) was used to evaluate the electrochemical glucose sensing performance of a glassy carbon electrode modified by α-Fe2O3/rGO nanocomposite and 5 % Nafion solution (Nafion/α-Fe2O3/rGO/GCE). The modified Nafion/α-Fe2O3/rGO/GCE was found to improve electrochemical glucose sensing performance. The modified Nafion/α-Fe2O3/rGO/GCE exhibited a high sensitivity and limit of detection of 327.92 μA mM−1 cm−2 and 0.6 mM respectively for electrochemical glucose sensing. The modified Nafion/α-Fe2O3/rGO/GCE shows good selectivity for glucose sensing over ascorbic acid and dopamine. The cyclic voltammetry (CV), galvanostatic charge/discharge (GCD), and electrochemical impedance spectroscopy (EIS) techniques were used for the evaluation of electrochemical supercapacitor performance of modified α-Fe2O3/rGO/stainless steel (α-Fe2O3/rGO/SS) electrode. The calculated values of specific capacitance, energy density, and power density for α-Fe2O3/rGO/SS electrode at the current density of 1 A/g were 310.2 F/g, 27.54 Wh/kg, and 309.71 W/kg respectively. These results indicate that the α-Fe2O3/rGO nanocomposite can be used as an electrochemical glucose sensor and supercapacitor.

Effect of phase transformation on the electrochemical supercapacitive behavior of thermally exfoliated zirconia

Amorphous and crystalline zirconia (ZrO2) are successfully synthesized through a rapid thermal exfoliation process. The crystal structure and phase purity of exfoliated materials are examined using XRD. Crystalline ZrO2 reveals the formation of a tetragonal phase. Amorphous zirconia possesses a specific surface area of 45 m2/g. As synthesized, amorphous zirconia provides a specific capacity of 1406C/g at 2 A/g (3-electrode measurements). A two-electrode asymmetric supercapacitor of activated carbon, amorphous zirconia (ZrO2//AC), exhibits a better electrochemical performance than its crystalline phase. The amorphous ZrO2-based asymmetric supercapacitor gives a specific capacitance of 160 F/g at 3 A/g. The device delivered an energy density of 47.6 Wh/kg at a power density of 2.2 kW/kg. These high energy and power density values of asymmetric amorphous ZrO2 supercapacitors outperform most of the reported ZrO2-based electrode materials. Amorphous ZrO2 is a promising electrode material in terms of its capacitance retention of ∼75 % over 10,000 cycles. The as-developed device has a rate capability of 35 % at a current density of 25 A/g and a self-discharge current of 2.6 mA.

Photo-bioelectrochemical cell anodes enhanced with titanium oxide, carbon nanotubes and chlorophyll-based catalyst on different supporting materials

An important part of a photo-bioelectrochemical cell (PBEC) is the photo-biocatalyst substrate taken as anode. This study aims to explain the effect of CNT/TiO2/chlorophyll photocatalyst coated on the cellulose nanopaper (CNP) substrate on the PBEC performance and to compare the results with those obtained for the commercial indium tin oxide (ITO) glass and flexible ITO as substrates. The results showed high sheet resistance of CNP, which is 61182 Ω sq-1, which is reduced by 80 % in the presence of CNT/TiO2/Chl biocatalyst. The highest output voltage of 0.95 to 1 V was produced by coating CNT/TiO2/Chl on the flexible ITO. The maximum current density (Jmax) of 3726 mA m-2 and the highest maximum power density value of around 574 mW m-2 were obtained for illuminated CNT/TiO2/Chl on the rigid ITO anode. In dark conditions, the highest power density was observed for CNP as the supporting substrate. The photo-bioelectrochemical cell adopting CNT/TiO2/Chl and CNP as the supporting substrate material has great potential for a variety of applications, such as wearable electronics, environmental monitoring, remote or off-grid energy supply, and renewable energy systems, thereby contributing to the advancement of sustainable energy technologies.

Construction of metal-organic framework/cellulose nanofibers-based hybrid membranes and their ion transport property for efficient osmotic energy conversion

The development of advanced nanofluidic membranes with better ion selectivity, efficient energy conversion and high output power density remains challenging. Herein, we prepared nanofluidic hybrid membranes based on TEMPO oxidized cellulose nanofibers (T-CNF) and manganese-based metal organic framework (MOF) using a simple in situ synthesis method. Incorporated T-CNF endows the MOF/T-CNF hybrid membrane with a high cation selectivity up to 0.93. Nanoporous MOF in three-dimensional interconnected nanochannels provides massive ion transport pathways. High transmembrane ion flux and low ion permeation energy barrier are correlated with a superior energy conversion efficiency (36 %) in MOF/T-CNF hybrid membrane. When operating under 50-fold salinity gradient by mixing simulated seawater and river water, the MOF/T-CNF hybrid membrane achieves a maximum power density value of 1.87 W m−2. About 5-fold increase in output power density was achieved compared to pure T-CNF membrane. The integration of natural nanofibers with high charge density and nanoporous MOF materials is demonstrated an effective and novel strategy for the enhancement of output power density of nanofluidic membranes, showing the great potential of MOF/T-CNF hybrid membranes as efficient nanofluidic osmotic energy generators.

Fabrication of MnSe/WSe2 nanohybrid electrode prepared through hydrothermal method for supercapacitor applications

The advancement of energy storage technology is vital in addressing the worldwide energy challenges which has garnered attention of researchers due to limited availability of non-renewable resources. Energy storage equipment's such as supercapacitor, batteries and capacitors have limitations because of poor electrochemical performance and reduced cycle stability exhibited by electrode materials. In order to assess suitability of electrode material for supercapacitor applications, it was crucial to achieve notably high electrochemical performance and stability. Due to larger values of power, energy density and excellent life cycle pseudocapacitor have gained the attention of researchers. The work employed hydrothermal method to produce MnSe, WSe2 and MnSe/WSe2 composite materials. Various methodologies were employed to ascertain the distinctive features of structural, electrochemical, and morphological attributes. The utilization of a 3-electrode setup yielded findings indicating that the MnSe/WSe2 composite possesses the highest specific capacitance value of 1326 F g−1, a specific energy value of 37 Wh kg−1 and a power density value of 225 W kg−1. The analysis of electrochemical stability of MS@WS composites showed that structural stability over 5000th cycles for 40 h. The Nyquist plot gives numerical value of charge transfer resistance of MS@WS nanohybrids (1.5 Ω) which was smaller than MS (1.7 Ω) and.WS (1.9 Ω). These values suggested that prepared electrode material may have potential to use in supercapacitor applications and other electronic devices.

V2O5/rGO formation in microwave autoclave approach and electrochemical durability evaluation analysis by graphite-sheet

A microwave-autoclave technique produced better V2O5/rGO assemblies in very little time. XRD used to confirm the structure and optical properties of the synthesised material. The optical spectrum were used to identify the most exact optical features and to check band energy and unique abilities. In the three-electrode configuration, the working electrode was a V2O5/rGO/graphite-sheet immersed in LiSO4 electrolyte. The cycle performance has been carried out multiple times, and the specific capacitance result reached 368 Fg−1. Galvanostatic charge and discharge evaluated the energy (Ed) and power density (Pd) values; the values are 219 Whkg−1 and 2.16 kWkg−1.

Fabrication of highly conductive graphene paper for supercapacitors with a one-step hydrothermal method

We present a facile one-step hydrothermal method for the fabrication of free-standing graphene paper using aqueous graphene oxide (GO) dispersion as the starting material. Notably, the method does not require the use of any additives for the reduction and preparation of the graphene paper. The resulting graphene paper exhibits a high degree of reduction, as confirmed by X-ray photoelectron spectroscopy (XPS) analysis, revealing a carbon-to-oxygen (C/O) ratio of ∼7. The fabricated graphene paper also demonstrates excellent conductivity, with a measured value of ∼1900 S/m, and sheet resistance of around 100 Ω/sq. Furthermore, the energy storage capability of the graphene paper based electrode is evaluated, which shows a promising specific capacity of 249 F/g at a current density of 1 A/g in 1M H2SO4 as the ionic medium. Additionally, the electrode has also demonstrated remarkable energy density and power density values of 28.68 Wh/Kg and 455 W/Kg, respectively. Overall, the resulting graphene paper exhibits high conductivity and excellent electrochemical performance, making it a promising candidate for various energy storage applications.

Production of bioelectricity from palm oil mill effluent through a dual chamber-microbial fuel cell system with the addition of Lactobacillus bulgaricus

Palm oil liquid waste has been successfully developed to produce bio-electricity with a dual chamber-microbial fuel cell system. This study utilized the Lactobacillus bulgaricus bacteria as a support for the substrate samples prepared in the anode chamber. Meanwhile, in the cathode chamber, KMnO4 electrolyte solution is used as an electroactive species that can capture electrons well. In addition, salt bridges fabricated from agar have a role as ion-exchange media in microbial fuel cells. The test results showed that the best performance was obtained in samples of palm oil wastewater with the addition of 10% Lactobacillus bulgaricus (LS/B-10) bacteria with current, voltage, and power density values of 0.9640 mA, 0.6760 V, and 248.04 mW/m2, respectively. The MFC system has also been proven to be able to reduce COD (Chemical Oxygen Demand) and TSS (Total Suspended Solid) levels, with the results of a reduction percentage of 42.6% and 7.2%, respectively, in the LS/B-10 variable treatment. All test results show that palm oil wastewater with the addition of Lactobacillus bulgaricus bacteria is promising for producing bioelectricity with a microbial fuel cell system.

Global wind energy resources decline under climate change

Wind energy is poised to play a major role in the energy transition. The objective of this work is to investigate the effects of climate change on global wind energy resources. For this purpose, a multi-model ensemble is constructed with selected Global Climate Models. Climate change is considered through the most recent scenarios, the Shared Socioeconomic Pathways. We find a significant decline in wind resources by 2100 relative to current levels. The decline is particularly evident in the mid-latitudes of the Northern Hemisphere – heavily populated regions where it matters especially, given the need for renewable energy production to increase substantially to decarbonise the energy supply. Exceptions to the global decline do exist, but in tropical and polar regions, far less populated. Depending on the climate-change scenario and the region, by 2100 changes may exceed 30 % of current average wind power density values. Additionally, we uncover a global increase in the variability of wind power density regardless of the scenario, which may be expected to affect the production of wind energy and its integration into the electricity networks. Recognising these effects of climate change is important in planning the energy transition and, more specifically, the contribution of wind energy.