Specific Capacitance Retention Rate Research Articles

Superficially activating strategies to elevate the supercapacitor performance of nano-cube nickel cobalt-Prussian blue

Prussian Blue Analogs (PBA) has good application potential in supercapacitors due to their unique microstructure characteristics. Nevertheless, the limited conductivity of these materials poses a significant obstacle to their widespread application as electrodes in supercapacitors. Herein, the conductivity of NiCo-PBA is enhanced through the implementation of three surface treatment methods, namely sulfidizing, selenizing and phosphating, and then the explicit electrochemical performance of NiCo-PBA was elevated. In addition, the P-NiCo-PBA//AC ASC occupies the best energy density (48.90 Wh kg−1/42.16 Wh kg−1) at a certain power density (1947.38 W kg−1/9545.10 W kg−1) compared to the NiCo-PBA//AC ASC, S-NiCo-PBA//AC ASC and Se-NiCo-PBA//AC ASC, and the specific capacitance retention rate of P-NiCo-PBA//AC ASC after 10,000 cycles is 88.25%. The phosphating strategy outperforms sulfidizing and selenizing strategies in enhancing the performance of nanocube-like NiCo-PBA supercapacitors. The accomplishment significantly broadens the potential applications of PBA-based materials as electrodes for supercapacitors.

Opening and Constructing Stable Lithium-ion Channels within Polymer Electrolytes.

Lithium-ion batteries play an integral role in various aspects of daily life, yet there is a pressing need to enhance their safety and cycling stability. In this study, we have successfully developed a highly secure and flexible solid-state polymer electrolyte (SPE) through the in situ polymerization of allyl acetoacetate (AAA) monomers. This SPE constructed an efficient Li+ transport channel inside and effectively improved the solid-solid interface contact of solid-state batteries to reduce interfacial impedance. Furthermore, it exhibited excellent thermal stability, an ionic conductivity of 3.82×10-4 S cm-1 at room temperature (RT), and a Li+ transport number (tLi+) of 0.66. The numerous oxygen vacancies on layered inorganic SiO2 created an excellent environment for TFSI- immobilization. Free Li+ migrated rapidly at the C=O equivalence site with the poly(allyl acetoacetate) (PAAA) matrix. Consequently, when cycled at 0.5C and RT, it displayed an initial discharge specific capacity of 140.6 mAh g-1 with a discharge specific capacity retention rate of 70 % even after 500 cycles. Similarly, when cycled at a higher rate of 5C, it demonstrated an initial discharge specific capacity of 132.3 mAh g-1 while maintaining excellent cycling stability.

Opening and Constructing Stable Lithium‐ion Channels within Polymer Electrolytes

AbstractLithium‐ion batteries play an integral role in various aspects of daily life, yet there is a pressing need to enhance their safety and cycling stability. In this study, we have successfully developed a highly secure and flexible solid‐state polymer electrolyte (SPE) through the in situ polymerization of allyl acetoacetate (AAA) monomers. This SPE constructed an efficient Li+ transport channel inside and effectively improved the solid‐solid interface contact of solid‐state batteries to reduce interfacial impedance. Furthermore, it exhibited excellent thermal stability, an ionic conductivity of 3.82×10−4 S cm−1 at room temperature (RT), and a Li+ transport number (tLi+) of 0.66. The numerous oxygen vacancies on layered inorganic SiO2 created an excellent environment for TFSI− immobilization. Free Li+ migrated rapidly at the C=O equivalence site with the poly(allyl acetoacetate) (PAAA) matrix. Consequently, when cycled at 0.5C and RT, it displayed an initial discharge specific capacity of 140.6 mAh g−1 with a discharge specific capacity retention rate of 70 % even after 500 cycles. Similarly, when cycled at a higher rate of 5C, it demonstrated an initial discharge specific capacity of 132.3 mAh g−1 while maintaining excellent cycling stability.

Ag nanocubes-decorated ammonium hydroxide-treated carbon nitride to improve photocatalytic H2O2 production and fuel cell performance

A novel photocatalyst is designed by surface modification and cocatalyst loading of graphitic carbon nitride (g-C3N4) with ammonium hydroxide and silver nanocubes (AgNCs), respectively. The synergistic effect of the modification in the intralayer of g-C3N4 and surface plasmon resonance (SPR) bands of AgNCs significantly enhances the migration and separation efficiency of photo-induced charge carriers. A nickel mesh coated with photocatalyst and the carbon paper loaded with pristine g–C3N4–mixed iron phthalocyanine (FeIIPc) used as the photoanode and cathode, respectively, are constructed for the self-powered photoelectrochemical cell, which exhibits the maximum power density of 0.74 mW cm−2. The AHCN/AgNCs-based cell reveals approximately a 3.1-times enhancement in maximum power density compared with the pristine g–C3N4–based cell. In addition, the photocatalytically generated H2O2 (chemical energy) can be stored in water, and then used as fuel by the connection of two electrodes in the dark. After the fuel cell is operated for 12 h, the specific capacitance retention rate still maintains as high as 57.2 %, which is the greatest retention rate in comparison with the previously reported H2O2 fuel cell systems. Our work offers a feasible opinion on how to improve the visible light utilization of semiconductors by tuning the intralayer properties and loading plasmonic metal.

A free-standing ZnO@NiCo2O4 nanofilm for supercapacitors and zinc-ion batteries with high-rate performance and high energy density

Transition metal oxides are promising candidates for high-performance electrode materials due to their high conductivity and abundant active sites. Nevertheless, its low energy density and poor rate performance limit its application in energy storage devices. Herein, a free-standing ZnO@NiCo2O4-4 nanofilm was sythesised through simple hydrothermal method. This novel material exhibited excellent electrochemical properties as a result of the synergistic effect of ZnO and NiCo2O4. Specially, the ZnO@NiCo2O4-4 electrode a high specific capacitance of 812.5 F g−1 at 1 A g−1 with remarkable rate performance delivers (615.8 F g−1 even at 10 A g−1). The as-prepared ZnO@NiCo2O4-4//AC supercapacitor exhibits a large energy density of 48.8 W h kg−1 at a power density of 375 W kg−1, and the specific capacitance retention rate of the device maintains 82% after 5000 cycles at 3 A g−1. Furthermore, the assembled ZnO@NiCo2O4-4//Zn zinc ion battery can deliver a high specific capacity of 71 mA h g−1. This work offers important guidance for preparing transition metal oxide nanofilms with excellent performance for supercapacitors and zinc-ion batteries.

VSe2/FeSe2 nanocubes synthesized by template method for high-performance aqueous ammonium ion batteries

Aqueous ammonium ion batteries have attracted wide attention due to their advantages of low cost, high safety and environmental friendliness. However, the low energy density limits its large-scale commercial application. In this work, a novel positive electrode material VSe2/FeSe2 for aqueous ammonium ion batteries was prepared by using KVFe PBAs NCs as a precursor. The as-synthesized VSe2/FeSe2 electrode exhibits excellent rate capability and stability at ultra-high current density. In 1 M (NH4)2SO4 electrolyte, the maximum charge/discharge capacity of the battery reached 227.1 mAh·g−1 at 1 A·g−1 current density, while the specific capacity retention rate of the battery reached 81.22% after 2000 cycles at 2 A·g−1. The excellent rate capability with a specific capacity of 109.7 mAh·g−1 at 5 A·g−1. This work provides some valuable ideas for the development of efficient electrode materials for aqueous ammonium ion batteries.

3D net-like Co3O4@NiO nanostructures for high performance supercapacitors.

Co3O4@NiO composite electrode materials were successfully synthesized by a two-step hydrothermal method followed by annealing treatment. Due to their three-dimensional network structure, these composite materials exhibited a large specific surface area, enhancing their electrochemical performance. Consequently, the Co3O4@NiO electrode demonstrated a specific capacitance of 1306 F g-1 at a current density of 1 A g-1, an excellent specific capacitance retention rate of 95.5% after 3000 cycles even at 8 A g-1 and a coulombic efficiency approaching 100%. These outstanding properties make the Co3O4@NiO composite materials promising electrode materials for high performance supercapacitors.

Redox Additive Electrolyte Study of Metal-Organic Framework Derived Nickel Phosphide/Carbon Composite for Supercapacitors

The performance and operation of an energy storage device are significantly influenced by the electrolyte and electrode materials. Therefore, it is crucial to create an electrode material with a rational design and ensure that it is compatible with the electrolyte. In this study, we prepare nickel phosphides/carbon (NP@C) nanostructure from Nickel metal-organic framework (Ni-MOF) using one-step phosphidation technique for supercapacitor applications. This method aims to produce a distinctive structure with more redox-active sites as well as improved conductivity and a high-polarized surface that will speed up ion migration between the electrolyte and the surface. In order to further enhance the redox additive sites and thus the charge transport, we have employed redox additive electrolyte (0.2M K3[Fe(CN)6] in 1M Na2SO4). Using three electrode electrochemical system, NP@C electrode obtained a phenomenal specific capacitance of 2136.3 F/g at 3A/g with a specific capacitance retention rate of 90.6% after 5000 cycles. Furthermore, a symmetric supercapacitor device is assembled using two NP@C electrodes and redox additive electrolyte that renders a high energy density of 52.5 Wh/kg at a power density of 750 W/kg along with a long cycle life of ~93% after 10000 cycles. Hence, this study demonstrates how NP@C and redox additive electrolyte work in perfect harmony to generate a high-performance supercapacitor.

Rapid Charge Transfer Enabled by Noncovalent Interaction through Guest Insertion in Supercapacitors based on Covalent Organic Frameworks.

Covalent organic frameworks (COFs) have been proposed for electrochemical energy storage, although the poor conductivity resulted from covalent bonds limits their practical performance. Here, we propose to introduce noncovalent bonds in COFs through a molecular insertion strategy for improving the conductivity of the COFs as supercapacitor. The synthesized COFs (MI-COFs) establish equilibriums between covalent bonds and noncovalent bonds, which construct a continuous charge transfer channel to enhance the conductivity. The rapid charge transfer rate enables the COFs to activate the redox sites, bringing about excellent electrochemical energy storage behavior. The results show that the MI-COFs exhibit much better performance in specific capacitance and capacity retention rate than those of most COFs-based supercapacitors. Moreover, through simply altering inserted guests, the mode and strength of noncovalent bond can be adjusted to obtain different energy storage characteristics. The introduction of noncovalent bonds is an effective and flexible way to enhance and regulate the properties of COFs, providing a valuable direction for the development of novel COFs-based energy storage materials.

Rapid Charge Transfer Enabled by Noncovalent Interaction through Guest Insertion in Supercapacitors based on Covalent Organic Frameworks

AbstractCovalent organic frameworks (COFs) have been proposed for electrochemical energy storage, although the poor conductivity resulted from covalent bonds limits their practical performance. Here, we propose to introduce noncovalent bonds in COFs through a molecular insertion strategy for improving the conductivity of the COFs as supercapacitor. The synthesized COFs (MI−COFs) establish equilibriums between covalent bonds and noncovalent bonds, which construct a continuous charge transfer channel to enhance the conductivity. The rapid charge transfer rate enables the COFs to activate the redox sites, bringing about excellent electrochemical energy storage behavior. The results show that the MI−COFs exhibit much better performance in specific capacitance and capacity retention rate than those of most COFs‐based supercapacitors. Moreover, through simply altering inserted guests, the mode and strength of noncovalent bond can be adjusted to obtain different energy storage characteristics. The introduction of noncovalent bonds is an effective and flexible way to enhance and regulate the properties of COFs, providing a valuable direction for the development of novel COFs‐based energy storage materials.

Synergistically enhanced roles based on 1D ceramic nanowire and 3D nanostructured polymer frameworks for composite electrolytes

Combining high ionic conductivity of inorganic solid electrolyte and favourable interface compatibility of polymer solid electrolyte, organic-inorganic composite electrolyte is more suitable for high-performance solid lithium battery. Herein, the polyacrylonitrile/polyvinylidene difluoride (PAN/PVDF) nanofiber membranes are prepared by electrospinning way, which can provide a strong skeleton support to improve the mechanical strength of composite electrolyte. The complexation between lithium ion and nitrile base of PAN can promote the transport of lithium ions and excellent oxidation resistance matching high-voltage cathode electrode. There are enough intermolecular hydrogen bonds between PVDF and PEO, and the presence of f in PVDF can enhance the interfacial interaction between the fiber membrane, polyethylene oxide (PEO) and lithium metal. Therefore, it can improve the conductivity of lithium ions and effectively inhibit the growth of severe lithium dendrites. Finally, the ionic conductivity of the composite electrolyte formed by introducing the Gd-doped SnO2 nanofibers (GDS NFs) into the PAN/PVDF nanofiber membranes and PEO matrix can reach 2.45 × 10−4 S cm−1 at 30 °C. In addition, the thickness of the composite electrolyte is only 65 μm, which can significantly improve the energy density of the battery. The specific capacity of the battery assembled with the electrolyte can still maintain 134.3 mA h g−1 after 300 cycles at 50 °C and 1C, and the specific capacity retention rate is up to 91.2 %. The NMC batteries also has a high reversible capacity even after 300 cycles. In conclusion, the Gd-doped SnO2 nanofibers and PAN/PVDF nanofiber membranes with excellent properties provide a novel idea for lithium metal batteries (LMBs).

In situ doping of lithium iron phosphate with excellent water-soluble zinc salt was used to improve its magnification performance

It has always been an important research direction for improving the intrinsic conductivity of Lithium iron phosphate materials. Doping can not only improve the intrinsic conductivity but also induce lattice distortion to increase the diffusion rate of lithium ions to improve the electrochemical performance. Zn-doped LiFe1-xZnxPO4 (x = 0, 0.025, 0.05, 0.075) is prepared from LiOH·H2O, FeSO4·7H2O, H3PO4, ZnSO4·7H2O. The composition, structure, morphology and electrochemical performance of the material are characterized in detail by XRD, SEM, EDS, cyclic voltammetry test, AC impedance test and other methods. The results show that the nano-spherical LiFe0.075Zn0.025PO4 exhibits excellent capacity performance and rate performance without intentionally coating C. The initial discharge specific capacity of the positive electrode material is 153.6 mAh·g−1 at 0.2C. The material also exhibits excellent cycle performance, with a discharge-specific capacity of 148.6mAh g−1 and a capacity retention rate of 96.7% after 100 cycles at a current density of 0.2C. Compared with the undoped samples, the doped ZnSO4 improves the actual capacitance of the samples. The high specific capacity retention rate at large rate charge-discharge indicates that zinc doping improves the structural stability of the samples. The crystal structure is not significantly damaged during the large current charge discharge process, and the magnification performance is improved.

Three-dimensional spherical NiCoOX@NiCo layered double hydroxides nanosheets for high-performance all-solid-state supercapacitors

The low conductivity of cobalt-based oxides greatly limits its application in supercapacitors (SCs). Recently, construction of heterogeneous structural materials has emerged as an effective way to solve this problem. Herein, nickel‑cobalt oxide @ nickel‑cobalt layered double hydroxides (NiCoOX@NiCo LDH) heterostructure is synthesized by an electrodeposition-annealing-electrodeposition step, in which the inner nickel‑cobalt oxide (NiCoOX) layer is firstly deposited on the carbon cloth with a subsequent annealing process, and the outer nickel‑cobalt layered double hydroxides (NiCo LDH) layer is electrodeposited on the prepared NiCoOX layer. Benefiting from the multi-channel structure and extensive specific surface area produced by the heterogeneous structure material, as same as its synergistic effect, at 1 A g−1, NiCoOX@NiCo LDH exhibits an extremely advanced specific capacitance (2451 F g−1). It is much better than pure NiCoOX and pure NiCo LDH. Meanwhile, its specific capacitance retention rate still keeps 62.8 % even at 20 A g−1, indicating its excellent rate property. Furthermore, the assembled all-solid-state asymmetric SCs with NiCoOX@NiCo LDH//Active carbon (AC) exhibits a high energy density of 34.9 Wh kg−1 when the power density is 800 W kg−1. Meanwhile, it has a high capacitance retention of 81.79 % (10 A g−1) after 10,000 cycles, which indicates a remarkable cycle life.

Preparation of high-performance asymmetric supercapacitors based on NiCo2S4 nanospheres and CuO-MOF nanosheets on carbon fibers

Highly efficient and low-cost supercapacitors (SCs) with excellent energy storing capacity are highly demanded to fabricate modern portable and wearable electronic devices. Herein, NiCo2S4 nanospheres and CuO-MOF nanosheets were fabricated on flexible carbon fibers (CF) by one-step hydrothermal solvent method, employed as two effective electrode materials. Accordingly, the cathode (CuO-MOF@CF) and anode (NiCo2S4@CF) plays a prominent role in energy storage properties due to large specific surface areas, by providing comparative capacities of 953 F/g and 1571 F/g, respectively. Remarkably, benefited from the synergistic effect, the designed asymmetric supercapacitor (SC) CuO-MOF@CF//NiCo2S4@CF exhibits a voltage window of ∼3.0 V, which demonstrates an impressive specific capacitance of 2426.6 F/g at a current density of 700 mA/g, the maximum energy density (ED) of 164.85 Wh/kg, as well as an excellent power density (PD) of 3780 W/kg. Even after 10,000 cycles of charge and discharge, the specific capacitance retention rate still reaches 96.43 %. This study offers a cost-effective and simple strategy for rational design of energy storage configurations for favorable electrochemical performances, emphasizing great potentials in next-generation supercapacitors application.

Preparation and electrochemical properties of Li3V2(PO4)3 glass-ceramic materials

The monoclinic lithium vanadium phosphate (Li3V2(PO4)3, LVP) is a promising cathode material for lithium-ion batteries due to its high theoretical specific capacitance, high operating voltage, good ionic conductivity, and thermal stability. However, synthesizing the pure LVP phase requires complicated procedures, expensive equipment, and long processing times. Moreover, the pure LVP phase has poor electrical conductivity, limiting its electrochemical properties and application. This study investigated the effect of glass preparation methods (single-crucible and double-crucible) and carbon coating on the crystalline phase, surface morphology, electrical conductivity, and electrochemical properties. A highly crystalline pure LVP phase can be synthesized effectively through heat treatment of the glass powder produced using the double crucible method at 700°C under a 5% H2-95% Ar atmosphere for 2 h. Adding C6H12O6 as a carbon source could increase the reducing atmosphere, preventing the oxidation of V3+ to V4+ and inhibiting the formation of the LiVOPO4 phase. This is beneficial for the synthesis of the pure LVP phase.Furthermore, the formation of an amorphous, uniform carbon coating on the surface of the LVP inhibits grain growth and increases the specific surface area. The CR2032 coin cell made with the LVP added with 10 wt% C6H12O6 had the highest initial discharge specific capacitance of 159.07 mAh g-1, with a specific capacitance retention rate of 77.31% even after 50 cycles. These findings suggest that LVP powder prepared using the double crucible method with carbon coating has the potential as a high-performance cathode material for lithium-ion batteries.

Synthesis of Co3O4/NiCo2O4 Double‐Shelled Nanocages with Enhanced Capacitive and Oxygen Evolution Reaction Properties in Battery‐Supercapacitor Hybrid Devices

AbstractNanomaterials with hollow shell structure were studied and used in environment and energy technology due to their high specific capacity and good cycling stability. In this study, Co3O4/NiCo2O4 double‐shelled nanocages (DSNCs) were synthesized. Firstly, ZIF‐67 (Zeolitic imidazolate framework) was synthesized at room temperature; then, a ZIF‐67/Ni−Co layered double shelled hydroxides (LDH) structure was synthesized by preparing the shell structure with the use of nickel nitrate. Finally, this LDH was calcinated at 350 °C to form Co3O4/NiCo2O4 DSNCs. Among the prepared electrodes, Co3O4/NiCo2O4‐2 DSNCs exhibited the largest specific capacity (236.18 C g−1), with high cycling stability (103.43 %, 5000 cycles). Meanwhile, the assembled Co3O4/NiCo2O4‐2//AC BSH device showed outstanding cycling stability, with a specific capacitance retention rate of 85.39 % and a good coulombic efficiency of 96.35 % even after 10000 cycles. Moreover, in oxygen evolution reaction (OER), Co3O4/NiCo2O4‐2 DSNCs also had a low Tafel slope and overpotential (158 mV). Co3O4/NiCo2O4 DSNCs with enhanced electrochemical performance demonstrate that the property of energy conversion and storage can be improved by preparation of hollow structure.

Enhancing the Electrochemical Stability of LiNi0.8Co0.1Mn0.1O2 Compounds for Lithium-Ion Batteries via Tailoring Precursors Synthesis Temperatures.

LiNi0.8Co0.1Mn0.1O2 (LNCMO) cathode materials for lithium-ion batteries (LIBs) were prepared by the hydrothermal synthesis of precursors and high-temperature calcination. The effect of precursor hydrothermal synthesis temperature on the microstructures and electrochemical cycling performances of the Ni-rich LNCMO cathode materials were investigated by SEM, XRD, XPS and electrochemical tests. The results showed that the cathode material prepared using the precursor synthesized at a hydrothermal temperature of 220 °C exhibited the best charge/discharge cycle stability, whose specific capacity retention rate reached 81.94% after 50 cycles. Such enhanced cyclic stability of LNCMO was directly related to the small grain size, high crystallinity and structural stability inherited from the precursor obtained at 220 °C.

Construction diversified morphologies of NiCo2O4 via tuning dielectric solvents as battery-type electrodes for supercapacitors

The construction of effective nano-microstructures electrode has been a tireless pursuit in the energy storage field. Herein, Controllable construction of diversified morphologies NiCo2O4 nanomaterials by tuning the dielectric constant and viscosity of the mixed solvent. We employed different solvent compositions as deionized water (DI), DI:Ethanol (1:1), DI: Isopropanol (1:1), DI: Propylene glycol (1:1), DI: Butanediol (1:1). In mixed aqueous solvents with low dielectric constants of ethanol and isopropanol, metal ions diffuse well and the nanomaterials tend to construct sheet-like nanostructures whereas high viscosity of the propylene glycol and butanediol solution will slow down the rate of metal ion diffusion, which only grow uni-directionally to form rod-like nanostructures. The formed ear-shaped NiCo2O4 nanostructures in Vpropylene glycol: VH2O = 1 : 1 mixed solvent have a large specific surface area and provide more electrochemically active sites, which facilitates effectively access electrolytes and thus accelerates the redox reaction rate. The resulting NiCo2O4 nanoears exhibits favorable capacity of 251 mAh g−1 and excellent rate performance with a 73.0% capacity retention at 20 A g−1. More importantly, the asymmetric supercapacitors assembled with the preferred NiCo2O4 nanoears and active carbon (AC) reveal excellent electrochemical performance at operating potential of 1.6 V, great specific capacity (58.0 mAh g−1), energy and power density of 46.4 Wh kg−1 at 801 W kg−1 and a specific capacity retention rate of 90.7% after 5000 cycles. This work provides a new perspective for the controllable construction of new micro-nanostructure materials.

Dendritic Fe2O3 single crystal for high performance lithium-ion batteries by turning the concentration of the iron source

Lithium-ion batteries (LIBs) are widely used due to their high capacity, high safety, and low cost. The anode material exhibits significant volume changes and subsequent reversible capacity decay during the lithiation/delithiation process, therefore, the performance of lithium-ion batteries is determined by the anode material. In this work, dendritic Fe2O3 single crystal with different precursor concentrations was prepared by hydrothermal method. The composition and microstructure of the samples were analyzed and tested using X-ray diffraction, scanning electron microscopy, and transmission electron microscopy techniques. The electrochemical performance was tested using cyclic voltage measurement and electrical impedance spectroscopy. The leaves of dendritic Fe2O3 were too small when the iron source concentration was too low to provide enough Fe3+, and excessive Fe3+ led to the leaves of dendritic Fe2O3 being too thick. The most suitable branch size and thickness of dendritic Fe2O3 single crystals were grown for 0.007 mol/l Fe3+ concentration (sample L4), and its electrode showed the best electrochemical performance. The sample L4 has a capacity of up to 734 mAh∙g−1 for 200 cycles at 100 mA∙g−1, and has a specific capacity retention rate of 95.4% after high current 3000 mA∙g−1. This work is believed to facilitate understanding single crystal growth mechanisms and promote the development of high-performance lithium-ion batteries.

Facile preparation of S, O-codoped carbon materials from wasted pulping liquid for supercapacitors

Hierarchical porous carbon S, O-doped is prepared by a facile and green way using industrial red pulping liquid as precursor and mild potassium chloride as initial templates to initiate templates regeneration. Replacement reactions occurs between potassium chloride and sodium atoms on precursors to form a more stable sodium chloride template, which is used to adjust pore structure during the etching process. Rich phenolic structures and sulfur groups in precursor result in the prepared porous carbon with many advantages for supercapacitors, including excellent specific surface area (1873.6 m2 g−1), high graphitization degree, hierarchical porosity and rich heteroatom content. The specific capacitance of fabricated samples can successfully achieve 386.9 F g−1. In addition, assembled energy storage device shows a remarkable energy density 8.6 Wh kg−1 at 21 kW kg−1 power density, and after 10,000 cycles, specific capacitance retention rate can be 86.4%. The superior electrochemical performances demonstrate a great potential candidate of industrial wastes for energy storage devices with excellent properties.