首页|Phosphorous-doped carbon nanotube/reduced graphene oxide aerogel cathode enabled by pseudocapacitance for high energy and power zinc-ion hybrid capacitors

Phosphorous-doped carbon nanotube/reduced graphene oxide aerogel cathode enabled by pseudocapacitance for high energy and power zinc-ion hybrid capacitors

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The design and development of energy storage device with high energy/power density has become a research hotspot.Zinc-ion hybrid capacitors(ZHCs)are considered as one of the most promising candi-dates.However,the application of ZHCs is hindered by their low energy density at high power density due to the unsatisfactory cathode material.In this study,a novel 3D phosphorus-doped carbon nan-otube/reduced graphene oxide(P-CNT/rGO)aerogel cathode is synthesized through a synergistic modi-fication strategy of CNT insertion and P doping modification combined with 3D porous design.The as-obtained P-CNT/rGO aerogel cathode manifests significantly increased surface aera,expanded interlayer spacing,and enhanced pseudocapacitance behavior,thus leading to significantly enhanced specific capac-itance and superb ions transport performance.The as-assembled ZHC based on P-CNT/rGO cathode deliv-ers a superior energy density of 42.2 Wh/kg at an extreme-high power density of 80 kW/kg and excellent cycle life.In-depth kinetic analyses are undertaken to prove the enhanced pseudocapacitance behavior and exceptional power output capability of ZHCs.Furthermore,the reaction mechanism of physical and chemical adsorption/desorption of electrolyte ions on the P-CNT/rGO cathode is revealed by systematic ex-situ characterizations.This work can provide a valuable reference for developing advanced graphene-based cathode for high energy/power density ZHCs.

Graphene aerogelPhosphorus dopingPseudocapacitanceZinc-ion hybrid capacitorsEnergy storage mechanism

Junjun Yao、Fuzhi Li、Ruyi Zhou、Chenchen Guo、Xinru Liu、Yirong Zhu

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Hunan Key Laboratory of Green Metallurgy and New Energy Materials,College of Materials and Advanced Manufacturing,Hunan University of Technology,Zhuzhou 412007,China

College of packaging and Material Engineering,Hunan University of Technology,Zhuzhou 412007,China

Distinguished Young Scientists of Hunan Province国家自然科学基金湖南省自然科学基金Key Projects of Hunan Provincial Education Department

2022JJ10024216010572021JJ3021622A0412

2024

10.1016/j.cclet.2023.108354

中国化学快报(英文版)
中国化学会

中国化学快报(英文版)

CSTPCD
影响因子：0.771
ISSN：1001-8417
年,卷(期)：2024.35(2)
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