多硫化物
分离器(采油)
硫黄
阳极
材料科学
化学工程
阴极
锂硫电池
储能
锂(药物)
电池(电)
离子
吸附
无机化学
化学
电化学
电极
电解质
冶金
有机化学
物理化学
热力学
量子力学
医学
物理
功率(物理)
内分泌学
工程类
作者
Jing Liu,Lixia Yuan,Kai Yuan,Zhen Li,Zhangxiang Hao,Jingwei Xiang,Yunhui Huang
出处
期刊:Nanoscale
[The Royal Society of Chemistry]
日期:2016-01-01
卷期号:8 (28): 13638-13645
被引量:130
摘要
The ithium–sulfur battery stands as one of the most promising successors of traditional lithium-ion batteries due to its super high theoretical energy density, but practical application still suffers from the shuttle effect arising from soluble intermediate polysulfides. Here, we report SnO2 as a chemical adsorbent for polysulfides. As an interlayer between the cathode and separator, SnO2 gives better results to prevent the polysulfides from diffusing to the lithium anode than as a modifier of the carbon matrix directly. The lithium–sulfur battery with an SnO2 interlayer delivers an initial reversible capacity of 996 mA h g−1 and retains 832 mA h g−1 at the 100th discharge at 0.5 C, with a fading rate of only 0.19% per cycle. The improvements benefit from the quasi-open space provided by the interlayer configuration for the diffused sulfur species, which can largely relieve the loss of active substances caused by the volume effect during the lithiation/delithiation process.
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