Electrochemical properties of the soluble reduction products in rechargeable Li/S battery
Electrochemical properties of the soluble reduction products in rechargeable Li/S battery
复制标题
DOI：
10.1016/j.jpowsour.2009.11.004
复制
发表时间：
2010-05-01
影响因子：
9.2
通讯作者：
Zhou, Yunhong
中科院分区：
文献类型：
--
作者：
Li, Yajuan;Zhan, Hui;Zhou, Yunhong
本文采用紫外可见光谱和电化学阻抗谱研究了Li/S电池中还原产物在溶液中的电化学行为。结果表明，在实际的Li/S电池中，多硫化物中间体的氧化还原过程包含五个电荷转移步骤。Li 2S最终还原产物和S-8最终再氧化产物的形成是完全不可逆的。多硫化物与Li_2S_2之间的转化是电化学缓慢的。对应于Li 2SxLi 2Sy（2
In this paper, the electrochemical behavior of the reduction products in solution for Li/S cell is studied by UV-visual spectroscopy and electrochemical impedance spectroscopy (EIS). The results tell that the redox process of the polysulfide intermediate contains five charge-transfer steps in the practical Li/S cell. The formation of final reduction product of Li2S and the final re-oxidation product of S-8 is completely irreversible. The transform between polysulfide and Li2S2 is electrochemical sluggish. The peaks corresponding to transformation Li2Sx Li2Sy (2 < x < y