In Situ X-ray Absorption Spectroscopic Study for α-MoO3 Electrode upon Discharge/Charge Reaction in Lithium Secondary Batteries

Bulletin of the Korean chemical society

Jin Ho Choy¹  Seung Min Paek¹  Joo Hee Kang¹ 

关键词: X-ray absorption spectroscopy;    Layered material;    Lithium secondary battery;   

DOI  :  

学科分类：化学（综合）

来源: Korean Chemical Society

【 摘 要 】

In-situ X-ray absorption spectroscopy (XAS) was used to elucidate the structural variation of α-MoO3 electrode upon discharge/charge reaction in a lithium ion battery. According to the XAS analysis, hexavalent Mo atoms in α-MoO3 framework are reduced as the amount of intercalated lithium ions increases. As lithium de-intercalation proceeds, most of pre-edge peaks are restored again. However, according to the Fourier transforms of the extended X-ray absorption fine structure (EXAFS) spectra, lithium de-intercalation reaction is partially irreversible upon the charge reaction, which is one of the main reasons why the capacity of α-MoO3 electrode decreases upon successive discharge/charge cycles.

【 授权许可】

Unknown