A comparative study of overdischarge behaviors of cathode materials for lithium-ion batteries

作者：Shu Jie^*; Shui Miao; Xu Dan; Wang Dongjie; Ren Yuanlong; Gao Shan

来源：Journal of Solid State Electrochemistry, 2012, 16(2): 819-824.

DOI：10.1007/s10008-011-1484-7

• Overdischarge
• Voltage limitation
• Solid-state amorphization
• Cathode materials
• Lithium-ion batteries

The overdischarge behaviors of LiFePO4, LiNiO2, and LiMn2O4 are thoroughly studied in different overlithiation voltage limitations. The results showed that LiFePO4 and LiMn2O4 cathode materials show high structure stability under the overdischarge process to 1.0 V. The microstructure of LiNiO2 is vulnerable to breakdown under the same testing condition. Fe-based olivine and Mn-based spinel cathode materials show better cyclic calendar life than that of Ni-based layered material. When an extreme overdischarge parameter (down to 0.0 V) is applied, all three samples experience an electrochemically driven irreversible solid-state amorphization process. Due to this overlithiation reaction, the host structure is totally destroyed. Therefore, it is harmful to experience deep overdischarge behaviors for most cathode materials.

• 出版日期2012-2
• 单位宁波大学