GO‐CoNiP New Composite Material Modified Separator for Long Cycle Lithium–Sulfur Batteries

Author:

Li Jiaqi1,Wu Xinxiang1,Jian Caifeng1,Qiao Xianyan1,Wan Fang1,Wu Zhenguo1,Zhong Benhe1,Chen Yanxiao1ORCID,Guo Xiaodong12

Affiliation:

1. College of Chemical Engineering Sichuan University Chengdu 610065 P. R. China

2. Institute for Superconducting and Electronic Materials University of Wollongong Wollongong NSW 2522 Australia

Abstract

AbstractLithium–sulfur batteries with high capacity are considered the most promising candidates for next‐generation energy storage systems. Mitigating the shuttle reaction and promoting catalytic conversion within the battery are major challenges in the development of high‐performance lithium‐sulfur batteries. To solve these problems, a novel composite material GO‐CoNiP is synthesized in this study. The material has excellent conductivity and abundant active sites to adsorb polysulfides and improve reaction kinetics within the battery. The initial capacity of the GO‐CoNiP separator battery at 1 C is 889.4 mAh g−1, and the single‐cycle decay is 0.063% after 1000 cycles. In the 4 C high‐rate test, the single‐cycle decay is only 0.068% after 400 cycles. The initial capacity is as high as 828.2 mAh g−1 under high sulfur loading (7.3 mg cm−2). In addition, high and low‐temperature performance tests are performed on the GO‐CoNiP separator battery. The first cycle discharge reaches 810.9 mAh g−1 at a low temperature of 0 °C, and the first cycle discharge reaches 1064.8 mAh g−1 at a high temperature of 60 °C, and both can run stably for 120 cycles. In addition, in situ Raman tests are conducted to explain the adsorption of polysulfides by GO‐CoNiP from a deeper level.

Funder

National Key Research and Development Program of China

Publisher

Wiley

Subject

Biomaterials,Biotechnology,General Materials Science,General Chemistry

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