Improved Cycle Performance of Sulfur-Doped LiFePO4 Material at High Temperatures

Bulletin of the Korean chemical society

Hyun Soo Kim¹  Seung Byung Lee¹  Vanchiappan Aravindan¹  Yun Sung Lee¹  Seung Hyun Cho¹ 

关键词: LiFePO4;    Sulfur ion doping;    Cathode material;    Sol-gel;    High temperature;   

DOI  :  

学科分类：化学（综合）

来源: Korean Chemical Society

【 摘 要 】

Pristine and sulfur-doped (LiFePO3.98S0.03) lithium iron phosphates were synthesized by a sol-gel method. The XRD pattern of the prepared materials suggested an orthorhombic structure with a Pnma space group and an absence of impurities. The Li/LiFePO4 or LiFePO3.98S0.03 cells were employed for cycling studies at various temperatures (25, 50 and 60 oC). In all cases, the Li/LiFePO3.98S0.03 cell showed an improved performance with a stable discharge behavior of ~155 mAhg-1. Nevertheless, pristine LiFePO4 cells presented poor discharge behavior at elevated temperatures, especially 60 oC.

【 授权许可】

Unknown