Excellent Supercapacitive Performance Research Articles

ALD-fabricated two-dimensional SnO2-In2O3n-n nanohybrid electrode for electrochemical supercapacitors

Fabrication of thin-film heterostructured electrodes with thickness below 10.0 nm is of great importance for the development of high-performance electrochemical supercapacitors (ESCs) with great capabilities. This is because such electrodes with uniform thicknesses enable fast electrochemical responses during charging/discharging ascribed to their short charge and ion diffusion lengths. In this study, two-dimensional (2D) SnO2-In2O3 heterostructures with a thickness of ∼7.84 nm was fabricated on Au/SiO2/Si wafers by the atomic layer deposition (ALD) technique for ESCs application. Various spectroscopic and microscopic analyses demonstrated the formation of 2D SnO2-In2O3 heterojunction with high purity, crystallinity and homogeneous morphology. Cyclic voltammetry (CV) measurements revealed the pseudocapacitive Faradaic redox reactions with good reversibility for 2D SnO2-In2O3 heterostructure. The heterostructured electrodes demonstrated excellent super-capacitive performance with high specific capacitance (Cs) up to 1048.25 and 757 F g−1 at the scan rate and the current density of 10 mV s−1 and 12 A g−1, respectively. Accordingly, a high energy density of 51.55 Wh kg−1 is attained at 12 A g−1. The high super-capacitive performance of these heterostructures can be attributed to the improved redox activity and short ion diffusion length of the SnO2-In2O3 nanohybrid thin-film. The electrodes also demonstrated great electrochemical stability with the Cs retention of 96.15% even after 5000 charge/discharge cycles.

An ultra-high power density supercapacitor: Cu(II) phthalocyanine tetrasulfonic acid tetrasodium salt doped polyaniline

In this study, an excellent electrode and supercapacitor performance with aqueous electrolyte exhibiting high operating voltage was obtained. Cu(II) phthalocyanine tetrasulfonic acid tetrasodium salt (CuPcTs) was used as a dopant in the polymerization of aniline on carbon felt electrode (CFt) by one-step hydrothermal method. Scanning electron microscopy (SEM) was used to analyze the morphological structure of PANI and CuPcTs doped PANI electrodes. Chemical analysis of the electrodes was performed using X-Ray diffractometry (XRD) and Fourier transform infrared spectroscopy (FT-IR); thermal properties of the electrodes were investigated using thermogravimetric analysis (TG/DTA). The surface area and pore volume of the electrodes were investigated using Brunauer-Emmett-Teller (BET) analysis. The electrochemical properties of the electrodes were investigated using cyclic voltammetry (CV), galvanostatic charge-discharge (GCD) and electrochemical impedance spectroscopy (EIS) methods. With the addition of CuPcTs and the use of graphite plate (GP) as the counter electrode, an asymmetrical supercapacitor was created for pseudocapacitive supercapacitors, in which the properties of redox materials were improved. CuPcTs doped PANI electrode showed a high specific capacitance of 982.2 F g −1 at 5 mV s −1 and showed excellent rate capability at different current densities of charge-discharge tests. Furthermore, wide operating-voltage of 3.2 V exhibited an ultra-high energy density value of 12800 W kg −1 and had an energy density of 764.4 Wh kg −1 . The electrode and supercapacitor displayed retention of capacitance performances of 91.4% and 79.7% after 1000 and 5000 cycles in aqueous electrolyte, respectively. • CuPcTs doped PANI carbon felt electrode was developed for supercapacitor applications. • 3.2 V wide operating voltage supercapacitor with 3.0 M KCI electrolyte. • A high specific capacitance of 982.2 F g −1 at 5 mV s −1 and excellent rate capability at charge-discharge tests. • A -maximum energy density of 764.4 Wh kg −1 and ultra-high power density of 12800 W kg −1 can be obtained for device.

Electric Field Guided Fast and Oriented Assembly of MXene into Scalable Pristine Hydrogels for Customized Energy Storage and Water Evaporation Applications

AbstractThe assembly of MXene nanosheets into a hydrogel framework is key to their grand success in practical applications. However, the scalable realization of such stable structures is challenging and requires critically high dispersion concentration for gelation. Herein, a simple yet highly controllable approach for the development of 2D and 3D monolithic hydrogels of MXene via electro‐tunable ordered assembly is reported. Directional electrophoretic drag of MXene and their gelation by voltage‐controlled in situ released ions at the electrode interface gives rise to stable hydrogels with tunable sheet orientations. Nanosheets can be arranged in‐plane or out‐of‐plane depending on the parallel or radial field created by customized electrode assembly. Further, the gelation rate can be easily regulated by the applied potential to achieve self‐standing hydrogel films in a few tens of seconds. The 2D hydrogels display excellent supercapacitive performance of 395 F g−1 at 2 mV s−1 with high retention of 42% at 5000 mV s−1. In another customized application, the 3D‐monolithic MXene hydrogel displays outstanding performance as a solar‐thermal evaporator on behalf of its vertical sheet orientations, showing an excellent evaporation rate of 1.91 kg m−2 g−1. This simple, fast, scalable, and sheet orientation‐controlled assembly can pave the way for future development of MXene hydrogels and beyond.

3D network structure of Co(OH)2 nanoflakes/Ag dendrites via a one-step electrodeposition for high-performance supercapacitors

Layered Co(OH)2 nanoflakes are regarded as a promising supercapacitor electrode material owing to its high theoretical speicific capacitance, but the application is limited by low electrical conductivity and weak mechanical strength. In this work, we synthesize a three-dimensional (3D) Co(OH)2 network structure supported by Ag dendrites on Ni foam by one-step electrodeposition. This 3D structure delivers an excellent supercapacitive performance with a specific capacitance of 2074 F·g−1 at 1 A g−1, and an 80.8% capacitance retention after 60,000 charge/discharge cycles at 5 A·g−1. The test results indicate that introduction of Ag dendrites can provide ideal conductivity and make the 3D structure more durable. Results of this paper provide a feasible method for the practical application of Co(OH)2 in supercapacitors.

Plasma-Engineered N-CoOx Nanowire Array as a Bifunctional Electrode for Supercapacitor and Electrocatalysis.

Surface engineering has achieved great success in enhancing the electrochemical activity of Co3O4. However, the previously reported methods always involve high-temperature calcination processes which are prone to induce agglomeration of the nanostructure, leading to the attenuation of performance. In this work, Co3O4 nanowires were successfully modified by a low-temperature NH3/Ar plasma treatment, which simultaneously generated a porous structure and efficient nitrogen doping with no agglomeration. The modified N-CoOx electrode exhibited remarkable performance due to the synergistic effect of the porous structure and nitrogen doping, which provided additional active sites for faradic transitions and improved charge transfer characteristics. The electrode achieved excellent supercapacitive performance with a maximum specific capacitance of 2862 mF/cm2 and superior cycling retention. Furthermore, the assembled asymmetric supercapacitor (N-CoOx//AC) device exhibited an extended potential window of 1.5 V, a maximum specific energy of 80.5 Wh/kg, and a maximum specific power of 25.4 kW/kg with 91% capacity retention after 5000 charge–discharge cycles. Moreover, boosted hydrogen evolution reaction performance was also confirmed by the low overpotential (126 mV) and long-term stability. This work enlightens prospective research on the plasma-enhanced surface engineering strategies.

Hierarchically Porous and Orderly Mesostructured Carbon Nanorods with Excellent Supercapacitive Performance

Hierarchically Porous and Orderly Mesostructured Carbon Nanorods with Excellent Supercapacitive Performance

Economic prosperity of developing flixweed seeds-derived porous carbon for ultrahigh-performance supercapacitors

The fabrication of carbon materials with low cost and high performance is the main challenge in wide applications of supercapacitors. In this work, facile carbonization and chemical activation processes are developed to convert flixweed seeds to hierarchical porous carbon with large specific surface area and self-doped ample heteroatoms (e.g., nitrogen, sulfur and oxygen). The obtained carbon material demonstrates several advantages in supercapacitors, such as ultrahigh specific capacitance of 662.4 F g−1 at 0.5 A g−1 and long cycling life >12,000 cycles at 20 A g−1. A symmetric supercapacitor based on the resulting carbon delivers a high energy density of 34 W h kg−1 at 1000 W kg−1 in 1 M Na2SO4. Therefore, flixweed seeds can be economically utilized for large-scale production of porous carbon with excellent supercapacitance performance.

Porous carbon microspheres with controlled porosity and graphitization degree for high-performance supercapacitor

• Porous carbon microspheres are synthesized via a simple template-free method. • Porous structure and graphitization degree are controlled. • Ni-based salts and ethanolamine affect porous structure and graphitization degree. • Porous carbon microspheres exhibited excellent supercapacitor performance. The fabrication of porous carbons plays an important role in improving electrochemical performance for supercapacitors. The fabrication of carbon microspheres with controlled porous structure and graphitization degree is still a challenge in synthetic methodology, since it is difficult to achieve both goals at the same time. Porous carbon microspheres with controlled porous structure and graphitization degree are realized here via a simple template-free method, using Ni-based salts and resorcinol-formaldehyde resin microspheres as raw materials. The amount and types of Ni-based salts as well as ethanolamine significantly affect the porous structure and graphitization degree for the carbon microspheres. The porous carbon microspheres prepared with 4.0 g of Ni(CH 3 COO) 2 ·4H 2 O and 0.25 mL of ethanolamine possess the surface area of 392.1 m 2 g −1 , the pore volume of 0.395 cm 3 g −1 and the I G /I D ratio of 1.18. The as-synthesized porous carbon microspheres can serve as excellent candidates for electrode materials in supercapacitors to achieve excellent electrochemical behaviors. The as-prepared porous carbon microspheres exhibit a specific capacitance of 193.8F g −1 at 1 A g −1 , good rate capability and long cycle life in a two-electrode system. The superior electrochemical performance can be attributed to both the unique hierarchical porous structure and high graphitization degree. The hierarchical porous structure can provide fine transportation pathways and a large number of adsorption sites for electrolyte ions, and high graphitization degree can ensure rapid electron transport.

MnO2 Nanoflowers Decorated on ZIF‐8‐ZnO with Ni Foam Supportfor High‐Performance Supercapacitors

AbstractIn this study, ZIF‐8 (Zn(MeIn)2, MeIn=2‐methylimidazole) was synthesized directly on Ni foam with the use of polydopamine (PDA). By following a hydrothermal process, MnO2 nanoflowers were decorated on the hybrid material of ZIF‐8/ZnO, as derived from ZIF‐8 via pyrolysis at 500 °C under nitrogen flow. The produced binder‐free electrode (NF/ZIF‐8‐ZnO/MnO2) demonstrated an excellent electrochemical performance for supercapacitors, including a specific capacitance of 2005 F g−1 at 2 A g−1 and a fairly high cycling stability (90.74% retention after 4000 cycles). Furthermore, a NF/ZIF‐8‐ZnO/MnO2//activated carbon (AC) asymmetric supercapacitor showed an energy density of 70.57 Wh kg−1 given a power density of 112.45 kW kg−1. These results demonstrate that NF/ZIF‐8‐ZnO/MnO2 is a promising candidate for supercapacitors due to the synergistic contribution of ZIF‐8, ZnO and MnO2.

Char of Tagetes erecta (African marigold) flower as a potential electrode material for supercapacitors

A char of Tagetes erecta flowers (TFC) was derived through simple thermal decompo­sition of Tagetes erecta flowers (TF). Physico-chemical properties of as-prepared TFC were evaluated using XRD, FESEM, FTIR, TGA, N2 adsorption-desorption isotherm analysis and water contact angle measurements. The practicality and applicability of TFC as promising electrode material in supercapacitors (SCs) were evaluated in full-cell configuration by performing electrochemical characterizations like CV, GCD and EIS on a lab-scale TFC-based symmetric SC. TFC exhibited a remarkable specific capacitance of 118.4 F g-1 at a constant current density of 0.2 A g-1 and a specific energy of 4.1 Wh kg-1 at specific power of 0.1 kW kg-1. TFC showed excellent cyclic stability by retaining 92 % of its initial capacitance even after 6000 GCD cycles at 2 A g-1. The superior capacitive behaviour and cyclic stability of TFC could be attributed to its good wettability towards water. This excellent supercapacitive performance of TFC estab­lishes it as a potential floral waste-derived carbon-based electrode material for SCs.

Fe-NX-C material with excellent supercapacitor performance prepared through oleic acid acidification pretreatment—Oily sludge pyrolysis process

Heteroatom-doped carbon materials derived from oil-bearing sludge exhibit excellent supercapacitor performance due to their unique electronic and chemical properties. However, the complex composition of heteroatoms in oil-bearing sludge makes it difficult to achieve sufficient and directional doping by direct pyrolysis. In this paper, an oleic acid pretreatment-roasting-secondary activation strategy was developed to make full use of hydrocarbons, iron- and nitrogen-containing compounds in oil-bearing sludge to prepare Fe-NX-C materials with excellent electrochemical properties. Characterization results such as transmission electron microscopy (TEM) and N2 adsorption analysis showed that the best sample had a hierarchical pore structure and uniform Fe and N element loading. X-ray photoelectron spectroscopy (XPS) analysis found that the addition of oleic acid can promote the formation of Fe-Nx, and the dosage of oleic acid will affect the content of Fe-Nx in the carbon materials. Electrochemical characterization of this supercapacitor material was conducted. The best sample's specific capacitance was as high as 293.6 F g−1 at the current density of 0.5 A g−1, and the capacitance retention rate could still reach 71.5% at the current density of 10 A g−1. The assembled button-type symmetrical supercapacitors had an energy density of 8.68 Wh kg−1 and a power density of 137.53 W kg−1, which is much higher than those of most other waste-based carbon materials. This work presents a new idea for the preparation of heteroatom doped carbon materials with excellent capacitive properties from oily sludge, which provides a new reference for the treatment and resource utilization of oily sludge.

Bamboo-based hierarchical porous carbon for high-performance supercapacitors: the role of different components

Bamboo shavings hierarchical porous carbon (BPC) possesses excellent prospects for applications in supercapacitors. Herein, the formation mechanism of the hierarchical porous structure of BPC is systematically investigated in an attempt to clarify the role of three components (cellulose, hemicellulose, and lignin) in bamboo shavings on the pore structure and electrochemical properties of BPC. An efficient three-component separation method of bamboo shavings is proposed. We adopt a green activation strategy of CO2-catalyzed induction of small doses of K2CO3 to prepare bamboo shavings and their different components into honeycomb-like hierarchical porous carbons with excellent supercapacitor performance. The findings demonstrate that cellulose and hemicellulose mainly provide the microporous structure for BPC. Lignin provides not only a large number of mesopores but also abundant micropores. Compared with porous carbon derived from other components, lignin-derived porous carbon exhibits the optimal specific capacitance (273 Fg−1 at 0.5 Ag−1) and rate performance (capacity retention of 82.6% at 20 Ag−1) attributed to the largest specific surface area (1985 m2g−1) and micro-mesopore volume, indicating that lignin provides an important guarantee for the excellent specific capacitance and rate performance of BPC. The cellulose-derived porous carbon demonstrates superior cycling stability (98.2% capacitance retention over 15,000 cycles) due to its extraordinary electrical conductivity and stable carbon backbone, which means that cellulose is essential to the outstanding cycling stability of the BPC. Furthermore, the existence of hemicellulose also promotes the electrochemical performance of BPC to some extent. With the combined action of lignin, cellulose and hemicellulose, the BPC demonstrates excellent electrochemical properties. This work provides a promising ideas for the subsequent adjustment of pore structure and optimization of electrochemical properties of biomass-derived carbon by adjusting the content of each component in biomass.

Magnesium oxide scaffolded preparation of N, O self-doped biochar with super-hydrophilic surface for aqueous supercapacitor with desired energy density

To assemble electrochemical supercapacitor with attractive energy density, heteroatoms self–doped biochar with hydrophilic surface and natural pore system is prepared by pyrolyzing Flammulina velutipes (FV) pickled with Mg(CH3COO)2 for the first time. The resultant biochar FVB-2-900 displays a super hydrophilicity. It also shows specific surface area of 1174.2 m2·g−1 and pore volume up to 1.57 cm3·g−1. Due to its N, O co-doped hydrophilic surface, the electrode based on it displays a specific capacitance of 470.5 F·g−1 at current density of 0.5 A·g−1 in three-electrode system. Its outstanding energy density of 18.0 Wh·kg−1 is calculated at power density of 0.7004 kW·kg−1 in the electrolyte 1.0 M H2SO4 for the assembled symmetric super-capacitor. Furthermore, a higher energy density of 26.1 Wh·kg−1 at power density of 1.0 kW·kg−1 is recorded in the electrolyte 1.0 M Na2SO4. It also exhibits a good cyclic stability of 100 % retention rate after 10,000 cycles at 5.0 A·g−1. The simple synthesis process, outstanding property, and excellent electrochemical super-capacitor performance make the biochar FVB-2-900 a competitive candidate in the green energy storage.

Nanomagnetic strontium ferrite nitrogen doped carbon (SrFe2O4-NC): Synthesis, characterization and excellent supercapacitor performance

A novel nitrogen-doped carbon strontium ferrite (SrFe2O4-NC) nanocomposite with a particle size of 8–10 nm was obtained using the polymeric route. Bimetallic precursors based on iron (III) and strontium chloride were produced with urea and formaldehyde polymers and the precursors were heated at 700 °C in an inert atmosphere to form the SrFe2O4-NC nanocomposite with high surface area (approximately 170.4 m2/g). The prepared SrFe2O4-NC nanocomposite shows ferromagnetic nature with saturation magnetization value of approximately 15 emu/g. Using cyclic voltammetry (CV), galvanic charge-discharge (GCD), and electrochemical impedance spectroscopy (EIS), the supercapacitor capabilities of the SrFe2O4-NC nanocomposite were investigated in 5 M KOH. The SrFe2O4-NC nanocomposite electrode material demonstrates a higher specific capacitance of approximately 895 F/g. High performance of the supercapacitor could be due to their good cyclic stability, high charge - discharge rate, and high energy density. As a result, our focus was on the fabrication of cost-effective and higher performance electrode materials.

Simplified attainment of porous carbon materials from nature's gifts

The preparation of biomass derived carbon materials usually suffers from complicated and time-consuming procedures, which severely limits their large-scale application. In this work, a modified molten salt-assisted carbonization strategy is proposed to obtain biomass derived porous carbon materials in a convenient way. In particular, the rice-paper plant (RRP) is used as the carbonaceous precursor, and the role of molten salt in the whole reaction process is comprehensively investigated. Under the action of molten salt, oxide impurities can be easily removed by ultrasonication, and both the pickling and activation process are eliminated. The as-obtained carbonized product (MS-RRP) with robust pore structure is obtained with excellent supercapacitor and lithium-ion battery performance. The universality of this strategy towards porous carbon materials production is then verified by using different biomass as raw materials, which is vital for controlling the cost of potential large-scale manufacturing.

Oxygen vacancy-rich flower-like nickel cobalt layered double hydroxides for supercapacitors with ultrahigh capacity

One of the main difficulties for high-performance supercapacitors (SCs) is to design rational structures with excellent electrochemical properties. Herein, oxygen vacancy-rich nickel-cobalt layered double hydroxide, which has excellent supercapacitor performance, is prepared through an electrodeposition procedure and in situ oxidation process on nickel foam substrate. The conductivity and electrochemical properties are significantly improved by oxygen vacancies, which can be adjusted via hydrogen peroxide treatment. NiCo-LDH with oxygen vacancy (Ov-NiCo-LDH) attains a superior specific capacity of 1160 C g−1 at the current density of 1 A g−1 and shows a good capacity retention rate (61% of its original specific capacity is left at 20 A g−1). Significantly, when the power density is 1.75 kW kg−1, the energy density of the assembled symmetric supercapacitor (SSC) device is up to 216.19 Wh·kg−1. This vacancy engineering strategy is helpful to the design of active materials for energy storage devices in the future.

Fabrication of High-Performance Asymmetric Supercapacitor Consists of Nickel Oxide and Activated Carbon (NiO//AC)

Exploring faster, safer, and more efficient energy storage devices will motivate scientists to develop novel energy storage products with high performance. Herein, we report porous NiO nanoparticles have been prepared by a simple hydrothermal method with CTAB and laboratory tissue paper as a template followed by calcination at three different temperatures (300, 500, and 700 °C). The electrochemical characteristics of the prepared materials were examined in a three-electrode cell configuration using aqueous potassium hydroxide (2.0 M KOH) electrolyte. The NiO-300 electrode displayed the supreme capacitance of 568.7 F g−1 at 0.5 A g−1. The fascinating NiO morphology demonstrates a crucial part in offering simple ion transport, shortening electron, and ion passage channels and rich energetic spots for electrochemical reactions. Finally, the asymmetric supercapacitor (ASC), NiO//AC was constructed using positive and negative electrode materials of NiO-300 and activated carbon (AC), respectively. The assembled ASC displayed excellent supercapacitive performance with a high specific energy (52.4 Wh kg−1), specific power (800 W kg−1), and remarkable cycle life. After quick charging (25 s), such supercapacitors in the series will illuminate the light emitting diode for an extended time, suggesting improvements in energy storage, scalable integrated applications, and ensuring business efficacy. This work will lead to a new generation of high-performance ASCs to portable electronic displays and electric automobiles.

Construction of NiCoZnS materials with controllable morphology for high-performance supercapacitors

A facile two-step hydrothermal approach with post-sulfurization treatment was put forward to construct the mixed transition metal sulfide (NiCoZnS) with a high electrochemical performance. The different morphologies of NiCoZnS materials were successfully fabricated by adjusted the Ni/Co molar ratio of the NiCoZn(OH)F precursor. Moreover, the in situ phase transformation from the NiCoZn(OH)F phase to Zn0.76Co0.24S and NiCo2S4 phases and lattice defects via the S2− ion-exchange were determined by x-ray diffractometer, transmission electron microscopy and x-ray photoelectron spectroscopy techniques, which improved electric conductivity and interfacial active sites of the NiCoZnS, and so promoted the reaction kinetics. Significantly, the urchin-like NiCoZnS1/1 prepared at the Ni/Co molar ratio of 1.0 exhibited promising electrochemical performances with high capacitance and excellent cycling stability. Furthermore, the asymmetric device (NiCoZnS//AC) using NiCoZnS1/1 as the positive electrode had excellent supercapacitor performances with an energy density of 57.8 Wh·kg–1 at a power density of 750 W·kg–1 as well as a long cycle life (79.2% capacity retention after 10 000 cycles), indicating the potential application in high-performance supercapacitors.

Clean production of N, O-doped activated carbon by water vapor carbonization/activation of expired coffee for high-volumetric supercapacitor

Clean production of activated carbon from household expired food provide an alternative way to get value-added product thus benefits waste reutilization and environmental protection. Herein, we fabricated N, O co-doped activated carbons (HCDC) from expired coffee to by a green route of direct water vapor carbonization/activation approach. In our approach, the expired coffee was firstly grinded and then carbonized under water vapor atmosphere. The derived HCDC owns low surface area (172–184 m2/g), large packing density (1.81–1.83 cm3/g), rich redox-active nitrogen (4.5 atom%) and oxygenic (12.0 atom%) functionalities. As electrode for supercapacitor, the HCDC achieves a high gravimetric capacitance of 312F/g at 1.0 A/g (vs 258F/g of commercial AC) and the value can be maintained 223F/g at 20 A/g, showing a high rate capability of 71.5%. Particularly, because of the large packing density, the HCDC exhibits an excellent volumetric supercapacitor performances: ultrahigh volumetric capacitance of 567F/cm3 (vs 165F/cm3 of commercial AC) and large energy density of 27.8 Wh/L@1820 W/L (vs 7.5 Wh/L@576 W/L for commercial AC) and superlong cycling stability with near 100 capacitance retention after continual 30 000 cycles at large current density of 9.0 A/g, suggesting a promising application for practical energy storage devices.

Design of few-layered 1T-MoS2 by supramolecular-assisted assembly with N-doped carbon quantum dots for supercapacitor

1T phase molybdenum disulfide decorated by N-doped carbon quantum dots (MoS2/NCQDs) is successfully synthesized by supramolecular-assisted method. N-doped carbon quantum dots (NCQDs) derived from citric acid and thiourea can form a supramolecular structure through hydrogen bonding, which spurs the formation process of MoS2 at a molecular level. The results demonstrate that NCQDs in supramolecular system and NH3 coming from thiourea effectively prevent the agglomeration of MoS2, resulting in the formation of 1T-MoS2 with a wide interlayer spacing about 0.95 nm. The as-prepared MoS2/NCQDs-6 possesses an excellent supercapacitive performance (379.5F g−1 at 0.5 A g−1) and outstanding rate capability (269.7F g−1 at 10 A g−1) under the synergy of NCQDs and 1T phase MoS2. The fabricated flexible asymmetric supercapacitor delivers an optimal energy density of 33.5 Wh kg−1 at 722.0 W kg−1. The excellent supercapacitive response should be contributed to the wide interlayer spacing of 1T-MoS2 which can improve the faster ion diffusion and the introduction of NCQDs which can offer a good electrical conductivity and enhance the hydrophilic property of the material. This work illumines a simple effective way to fabricate practical used 1T MoS2 hybrid electrode materials for supercapacitor.