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V3S4 Nanosheets Anchored on N, S Co-Doped Graphene with Pseudocapacitive Effect for Fast and Durable Lithium Storage

1
Key Laboratory of Function-oriented Porous Materials, College of Chemistry and Chemical Engineering, Luoyang Normal University, Luoyang 471934, China
2
College of Materials and Chemical Engineering, China Three Gorges University, Yichang 443002, China
*
Authors to whom correspondence should be addressed.
Nanomaterials 2019, 9(11), 1638; https://doi.org/10.3390/nano9111638
Received: 12 October 2019 / Revised: 12 November 2019 / Accepted: 13 November 2019 / Published: 18 November 2019
Construction of a suitable hybrid structure has been considered an important approach to address the defects of metal sulfide anode materials. V3S4 nanosheets anchored on an N, S co-coped graphene (VS/NSG) aerogel were successfully fabricated by an efficient self-assembled strategy. During the heat treatment process, decomposition, sulfuration and N, S co-doping occurred. This hybrid structure was not only endowed with an enhanced capability to buffer the volume expansion, but also improved electron conductivity as a result of the conductive network that had been constructed. The dominating pseudocapacitive contribution (57.78% at 1 mV s−1) enhanced the electrochemical performance effectively. When serving as anode material for lithium ion batteries, VS/NSG exhibits excellent lithium storage properties, including high rate capacity (480 and 330 mAh g−1 at 5 and 10 A g−1, respectively) and stable cyclic performance (692 mAh g−1 after 400 cycles at 2 A g−1). View Full-Text
Keywords: V3S4 nanosheets; pseudocapacitive; N, S co-doped graphene; lithium ion batteries V3S4 nanosheets; pseudocapacitive; N, S co-doped graphene; lithium ion batteries
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MDPI and ACS Style

Wu, N.; Miao, D.; Zhou, X.; Zhang, L.; Liu, G.; Guo, D.; Liu, X. V3S4 Nanosheets Anchored on N, S Co-Doped Graphene with Pseudocapacitive Effect for Fast and Durable Lithium Storage. Nanomaterials 2019, 9, 1638.

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