首页|Boost VS2 electrochemical reactive kinetics by regulating crystallographic planes and coupling carbon matrix for high performance sodium-ion storage

Boost VS2 electrochemical reactive kinetics by regulating crystallographic planes and coupling carbon matrix for high performance sodium-ion storage

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Vanadium disulfide(VS2)as a typical two-di-mensional transition metal chalcogenide has excellent competitiveness for sodium-ion storage due to its wide layer spacing(0.575 nm),high theoretical capacity of 932 mAh·g-1 originating from multi-electron electrochemical redox.However,continuous sodiation process accompa-nied by crystal structural evolution and collapse cause rapid capacity decaying.Herein,novel few-layer VS2 nanosheets with open(001)crystal planes are in-situ constructed on reduced graphene oxide to solve these issues mentioned above.It indicates that few-layer VS2 provides more Na+storage activity due to the low Na+surface migration energy barrier on exposed crystal(001)planes.The flexible and high electronic conductivity of carbon matrix also effectively builds multi-level buffer structure and electron transport kinetics to boost the Na+insertion/conversion reactive activity on VS2 as well as Na+pseudocapacitance storage kinetics on edges and defects of nanosheets.Those coupling effects result in high rate capability and long cycling stability as a battery/ca-pacitor anode.It delivers conspicuous high energy density of 81 and 40 Wh·kg-1 at power density of 118 and 10,286 W·kg-1,as well as 80％energy retention rate after 5000 cycles,confirming its great application potential in sodium-based storage devices.

Vanadium disulfideReduced graphene oxideAnodeSodium-ion batterySodium-ion capacitor

Min Zeng、Ming-Shan Wang、Lin Chen、En-Zhi Li、Zhen-Liang Yang、Dan Zhou、Hai-Jiao Xie、Jun-Chen Chen、Zhi-Yuan Ma、Bing-Shu Guo、Bo Yu、Xing Li

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School of New Energy and Materials,Southwest Petroleum University,Chengdu 610500,China

Energy Storage Research Institute,Southwest Petroleum University,Chengdu 610500,China

Institute of Materials,China Academy of Engineering Physics,Mianyang 621908,China

Beijing Advanced Innovation Center for Materials Genome Engineering,University of Science and Technology,Beijing,Beijing 100083,China

Hangzhou Yanqu Information Technology Co.,Ltd.,Hangzhou 310003,China

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National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaSichuan Science and Technology ProgramSichuan Science and Technology Program

52072322516042502022YFG02942019-GH02-00052-HZ

2024

10.1007/s12598-023-02399-6

稀有金属(英文版)
中国有色金属学会

稀有金属(英文版)

CSTPCDEI
影响因子：0.801
ISSN：1001-0521
年,卷(期)：2024.43(1)
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