分离器(采油)
硫黄
材料科学
复合数
锂硫电池
充电周期
电池(电)
化学工程
储能
吸附
电极
化学
复合材料
电化学
冶金
有机化学
热力学
物理化学
工程类
汽车蓄电池
功率(物理)
物理
作者
Jiaqi Li,Xuelian Wu,Caifeng Jian,Xianyan Qiao,Fang Wan,Zhenguo Wu,Benhe Zhong,Yanxiao Chen,Xiaodong Guo
出处
期刊:Small
[Wiley]
日期:2023-12-04
标识
DOI:10.1002/smll.202307912
摘要
Lithium-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.
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