Development of high rate Li-ion batteries with water-solubility binder

• 作 者: JINHui-fen;GAOJun-kui;
• 机 构: R&D Center Tianjin Lishen Battery Joint-Stock CO.,LTD
• 出 处: Conference of International Battery Frontier (CIBF2010)(第九届中
• 发表日期: 2010年期

　　Using modified polyethylene oxide (PEO) as cathode binder, a high rate 18650 cylindrical Iithium-ion battery containing LiFePO4 cathode and graphite anode was developed.Focused on investigation of battery rate capability, cycle life,storage, overcharge and thermal stability, and compared these performances with those batteries that use conventional PVDF as cathode binder. The results show that the capacity was 95% of the initial capacity for PEO cells while 86% for PVDF cell after 400 life cycles at 1C charge and 5C discharge.Accelerating Rate Calorimetry (ARC) was used to study the thermal stability of two kinds full-charged batteries. ARC results show that the PEO cells are more safety than PVDF cells.The capacity was able to be 95% of the initial capacity for two kinds cells after storage at 60℃ and one week. All cells pass the overcharge test at 1C/10V.