All-Solid-State Supercapacitor with High Volumetric Energy for Flexible Application

Yu, Sheng-Bo; Lv, You; Zhong, Hong; Xi, Junhua; Xiong, Qinqin; Qin, Haiying

doi:10.1149/2.0341913jes

Cited by 7 publications

(5 citation statements)

References 50 publications

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“…Meanwhile, transition metal compounds can be used as electrode materials for SCs [13][14][15], and they have a high specific surface area as well, which always contributes to the good electrochemical performance of supercapacitors. For example, ternary nickel-copper-sulfide has rich redox reactions and active sites.…”

Section: Introductionmentioning

confidence: 99%

Spinning of Carbon Nanofiber/Ni–Cu–S Composite Nanofibers for Supercapacitor Negative Electrodes

Li,

Wang,

Wei

et al. 2024

Energies

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The preparation of composite carbon nanomaterials is one of the methods for improving the electrochemical performance of carbon-based electrode materials for supercapacitors. However, traditional preparation methods are complicated and time-consuming, and the binder also leads to an increase in impedance and a decrease in specific capacitance. Therefore, in this work, we reduced Ni-Cu nanoparticles on the surface of nitrogen-doped carbon nanofibers (CNFs) by employing an electrostatic spinning method combined with pre-oxidation and annealing treatments. At the same time, Ni-Cu nanoparticles were vulcanized to Ni–Cu–S nanoparticles without destroying the structure of the CNFs. The area-specific capacitance of the CNFs/Ni–Cu–S–300 electrode reaches 1208 mF cm−2 at a current density of 1 mA cm−2, and the electrode has a good cycling stability with a capacitance retention rate of 76.5% after 5000 cycles. As a self-supporting electrode, this electrode can avoid the problem of the poor adhesion of electrode materials and the low utilization of active materials due to the inactivity of the binder and conductive agent in conventional collector electrodes, so it has excellent potential for application.

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Section: Introductionmentioning

confidence: 99%

Spinning of Carbon Nanofiber/Ni–Cu–S Composite Nanofibers for Supercapacitor Negative Electrodes

Li,

Wang,

Wei

et al. 2024

Energies

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“…This enables their direct deposition onto the surface of the graphene lamellar structure. This advantageous feature contributes to achieving the desired capacitance retention 22 . Kumar 23 employed microwave irradiation to synthesize a ternary hybrid of NiO/MnO 2 particles loaded on reduced graphene oxide nanosheets.…”

Section: Introductionmentioning

confidence: 99%

“…This advantageous feature contributes to achieving the desired capacitance retention. 22 Kumar 23 employed microwave irradiation to synthesize a ternary hybrid of NiO/MnO 2 particles loaded on reduced graphene oxide nanosheets. The resulting hybrid exhibited a specific capacitance of 165.7 mAh g À1 and showed a capacitance retention of 83.2% after 2000 consecutive cycles.…”

Section: Introductionmentioning

confidence: 99%

Polyaniline/manganese nickel oxide/graphene composites as electrode materials for supercapacitors

Ma,

Fu,

Wei

et al. 2023

J of Applied Polymer Sci

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This study introduces a novel electrode material featuring a core‐shell intercalation structure. The material was synthesized using a simple and scalable method suitable for industrial replication. The outer layer of the electrode material comprises polyaniline, enveloping a nuclear structure composed of manganese dioxide and nickel oxide. This core‐shell configuration is then integrated into the lamellar structure of graphene oxide, resulting in the formation of PANI@(MnO2 + NiO)@GO composite. The combination of polyaniline, metal oxides, and graphene oxide demonstrates robust adsorption capacity, leading to the development of a three‐dimensional stable structure between the core and the shell. Additionally, graphene oxide contributes to the bilayer capacitance of the composites, resulting in simultaneous multiple synergistic effects and improved charge storage capacity. Electrochemical characterization reveals exceptional properties of this composite material, exhibiting a specific capacitance of 396 F g−1 at a current density of 0.5 A g−1 in a three‐electrode configuration. Furthermore, the material retains 82.6% of its capacitance after undergoing 3000 consecutive charge/discharge cycles. Calculations estimate the energy density and power density of this composite in a supercapacitor employing 1 M Na2SO4 electrolyte to be 43.2 W h kg−1 and 249.99 W kg−1, respectively.

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“…At present, flexible energy storage devices mainly include flexible supercapacitors and flexible lithium-ion batteries [4][5][6][7][8]. Among them, flexible-fiber supercapacitors have attracted extensive attention because of their high power density, rapid charge-discharge rate, good flexibility, and braidability [7,[9][10][11][12]. Carbon materials have been widely used as electrode materials for flexible supercapacitors because of their excellent conductivity, good corrosion resistance, stability, and excellent mechanical properties [7,13,14].…”

Section: Introductionmentioning

confidence: 99%

Simple Mixed-Acid-Treated Carbon Fiber Electrodes with Oxygen-Containing Functional Groups for Flexible Supercapacitors

Wang

Cui

et al. 2023

J. Compos. Sci.

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Flexible supercapacitors are demanded for energy storage of wearable electronics. In this paper, a simple strategy for preparing flexible carbon fibers (CFs) with good energy storage capacity using a mixed acid treatment process is reported. When the volume ratio of concentrated sulfuric acid to concentrated nitric acid is 3:1, the carbon fiber electrodes have the best electrochemical performance with a high capacitance of 27.83 F g−1 at 15 mA g−1 and extremely high capacitance retention of 79.9% after 500 cycles at 100 mA g−1. Furthermore, their energy density can reach 3.86 Wh kg−1 with a power density of 7.5 W kg−1. Such an excellent electrochemical performance of carbon fiber electrodes is attributed to their surface rich oxygen-containing functional groups, rough surface, and a certain number of graphene quantum dots (GQDs). Importantly, the all-solid-state flexible supercapacitor performs excellent bending stability performance with a capacitance retention of almost 100% after 500 times of bending at 180°, showing good prospects and applications in the field of flexible energy storage devices.

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All-Solid-State Supercapacitor with High Volumetric Energy for Flexible Application

Cited by 7 publications

References 50 publications

Spinning of Carbon Nanofiber/Ni–Cu–S Composite Nanofibers for Supercapacitor Negative Electrodes

Spinning of Carbon Nanofiber/Ni–Cu–S Composite Nanofibers for Supercapacitor Negative Electrodes

Polyaniline/manganese nickel oxide/graphene composites as electrode materials for supercapacitors

Simple Mixed-Acid-Treated Carbon Fiber Electrodes with Oxygen-Containing Functional Groups for Flexible Supercapacitors

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