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Open AccessArticle

2D/1D V2O5 Nanoplates Anchored Carbon Nanofibers as Efficient Separator Interlayer for Highly Stable Lithium–Sulfur Battery

1
School of Materials Science and Engineering, Zhengzhou University, Kexue Ave 100, Zhengzhou 450001, China
2
College of Environment and Materials Engineering, Yantai University, Yantai 264005, China
3
School of Materials Science and Engineering, Shanghai University, Shangda Rd 99, Shanghai 200444, China
*
Authors to whom correspondence should be addressed.
Nanomaterials 2020, 10(4), 705; https://doi.org/10.3390/nano10040705
Received: 11 March 2020 / Revised: 1 April 2020 / Accepted: 6 April 2020 / Published: 8 April 2020
(This article belongs to the Special Issue Design and Synthesis of Nanomaterials for Energy Storage)
Quick capacity loss due to the polysulfide shuttle effects is a critical challenge for high-performance lithium–sulfur (Li–S) batteries. Herein, a novel 2D/1D V2O5 nanoplates anchored carbon nanofiber (V-CF) interlayer coated on standard polypropylene (PP) separator is constructed, and a stabilization mechanism derived from a quasi-confined cushion space (QCCS) that can flexibly accommodate the polysulfide utilization is demonstrated. The incorporation of the V-CF interlayer ensures stable electron and ion pathway, and significantly enhanced long-term cycling performances are obtained. A Li–S battery assembled with the V-CF membrane exhibited a high initial capacity of 1140.8 mAh·g−1 and a reversed capacitance of 1110.2 mAh·g−1 after 100 cycles at 0.2 C. A high reversible capacity of 887.2 mAh·g−1 is also maintained after 500 cycles at 1 C, reaching an ultra-low decay rate of 0.0093% per cycle. The excellent electrochemical properties, especially the long-term cycling stability, can offer a promising designer protocol for developing highly stable Li–S batteries by introducing well-designed fine architectures to the separator. View Full-Text
Keywords: V2O5 nanoplates; carbon nanofiber; quasi-confined cushion space; interlayer; lithium–sulfur batteries V2O5 nanoplates; carbon nanofiber; quasi-confined cushion space; interlayer; lithium–sulfur batteries
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Zhang, Z.; Wu, G.; Ji, H.; Chen, D.; Xia, D.; Gao, K.; Xu, J.; Mao, B.; Yi, S.; Zhang, L.; Wang, Y.; Zhou, Y.; Kang, L.; Gao, Y. 2D/1D V2O5 Nanoplates Anchored Carbon Nanofibers as Efficient Separator Interlayer for Highly Stable Lithium–Sulfur Battery. Nanomaterials 2020, 10, 705.

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