原位
聚合物电解质
电解质
材料科学
离子
锂(药物)
化学工程
聚合物
纳米技术
环境科学
化学
复合材料
有机化学
离子电导率
电极
心理学
物理化学
工程类
精神科
作者
Lijiao Quan,Qili Su,Haiyuan Wu,Weiyi Huang,Mingzhu Liu,Yong Lu,Zhe Li,Haijing Liu,Lidan Xing,Weishan Li
标识
DOI:10.1016/j.cej.2022.140086
摘要
• A brand-new all-climate GPE was rationally designed to in-situ engineer interfaces within high-power lithium-ion battery. • The GBL-based GPE endows lithium-ion battery with remarkable all-climate performances. • The high-power pouch cell with the non-flammable GPE exhibit great tolerance under abusive conditions. Lithium-ion batteries (LIBs) with gel polymer electrolytes (GPE) employing highly volatile and extremely flammable linear carbonate solvents still face the safety hazard of fire and combustion. Gamma-butyrolactone (GBL) as electrolyte solvent can greatly improve the safety and all-climate performance of LIBs due to its higher flash point, lower vapor pressure, better thermal stability and wider liquid temperature range than those of the carbonate solvents. However, the application of GBL solvent is hindered by its incompatibility with the most widely used graphite anode. Herein, an all-climate high-power LiMn 2 O 4 + LiMn 0.7 Fe 0.3 PO 4 /graphite pouch cell is achieved by employing non-flammable GBL-based GPE. The interphacial instability of GBL/graphite is solved by introducing three synergistic film-forming additives, including lithium bis(oxalato)borate, 4-vinyl-1,3-dioxolan-2-one and 3-sulfolene. The developed non-flammable GBL-based GPE enable the all-climate high-power pouch cell application with great room-temperature rate capability, excellent low-temperature cranking and long elevated-temperature durability. More importantly, the developed pouch cells exhibit excellent cold-cranking performance even at -18 °C and maintain a high-capacity retention of 80% after 400 cycles at 1C at 25 °C.
科研通智能强力驱动
Strongly Powered by AbleSci AI