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

School of New Energy and Materials;School of New Energy and Materials;School of New Energy and Materials;School of New Energy and Materials;School of New Energy and Materials;School of New Energy and Materials;School of New Energy and Materials;School of New Energy and Materials;School of New Energy and Materials;School of New Energy and Materials;School of New Energy and Materials;School of New Energy and Materials
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Abstract AITranslate

Vanadium disulfide(VS2) as a typical two-dimensional transition metal chalcogenide has excellent competitiveness for sodium-ion storage due to its wide layer spacing(0.575 nm),high theoretical capacity of 932mAh·g-1 originating from multi-electron electrochemical redox.However,continuous sodiation process accompanied by crystal structural evolution and collapse cause rapid capacity decaying.Herein,novel few-layer VS2nanosheets with open(001) crystal planes are in-situ constructed on reduced graphene oxide to solve these issues mentioned above.It indicates that few-layer VS2provides 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 nano sheets.Those coupling effects result in high rate capability and long cycling stability as a battery/capacitor anode.It delivers conspicuous high energy density of 81 and 40 Wh·kg-1 at power density of 118 and 10,286W·kg-1,as well as 80% energy retention rate after 5000cycles,confirming its great application potential in sodiumbased storage devices.

KeyWords AITranslate

Vanadium disulfide Reduced graphene oxide Anode Sodium-ion battery Sodium-ion capacitor

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Basic Information:

DOI:

Chinese Library Classification Number:TM912[电气工程—电力电子与电力传动];TM53[电气工程—电器];O643.1[理学—物理化学]

Citation Information:

Vanadium disulfide(VS2) as a typical two-dimensional transition metal chalcogenide has excellent competitiveness for sodium-ion storage due to its wide layer spacing(0.575 nm),high theoretical capacity of 932mAh·g-1 originating from multi-electron electrochemical redox.However,continuous sodiation process accompanied by crystal structural evolution and collapse cause rapid capacity decaying.Herein,novel few-layer VS2nanosheets with open(001) crystal planes are in-situ constructed on reduced graphene oxide to solve these issues mentioned above.It indicates that few-layer VS2provides 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 nano sheets.Those coupling effects result in high rate capability and long cycling stability as a battery/capacitor anode.It delivers conspicuous high energy density of 81 and 40 Wh·kg-1 at power density of 118 and 10,286W·kg-1,as well as 80% energy retention rate after 5000cycles,confirming its great application potential in sodiumbased storage devices.

quote

GB/T 7714-2015 [1] Min Zeng, Ming-Shan Wang, Lin Chen, et al. Rare Metals, 2024(1): 98-112.
MLA [1] Min Zeng, et al., Rare Metals, no. 1, 2024, pp. 98-112.
APA [1] 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. (2024). Rare Metals(1), 98-112.
IEEE [1] 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, and Xing Li, Rare Metals, no. 1, pp. 98-112, 2024.