关键词: Lithium batteries, Ternary cathode material, All-solid-state polymer electrolyte, Gel polymer electrolyte

Abstract: Layered transition metal oxides such as LiNi_xMn_yCo_1-x-yO₂ and LiNi_xCo_yAl_1-x-yO₂ (NCA) (referred to as ternary cathode material, TCM) are widely recognized to be promising candidates for lithium batteries (LBs) due to superior reversible capacities, high operating voltages and low production costs. However, despite recent progress toward practical application, commercial TCM-based lithium ion batteries (LIBs) sufer from severe issues such as the use of fammable and hazardous electrolytes, with one high profle example being the ignition of NCA-based LIBs used in Tesla Model S vehicles after accidents, which jeopardizes the future development of TCM-based LBs. Here, the need for TCM and fammable liquid electrolytes in TCM-based LBs is a major obstacle that needs to be overcome, in which conficting requirements for energy density and safety in practical application need to be resolved. To address this, polymer electrolytes have been demonstrated to be a promising solution and thus far, many polymer electrolytes have been developed for high-performance TCM-based LBs. However, comprehensive performances, especially long-term cycling capabilities, are still insufcient to meet market demands for electric vehicles, and moreover, comprehensive reviews into polymer electrolytes for TCM-based LBs are rare. Therefore, this review will comprehensively summarize the ideal requirements, intrinsic advantages and research progress of polymer electrolytes for TCM-based LBs. In addition, perspectives and challenges of polymer electrolytes for advanced TCM-based LBs are provided to guide the development of TCM-based power batteries.

Full-text：https://link.springer.com/article/10.1007/s41918-018-00027-x

Key words: Lithium batteries, Ternary cathode material, All-solid-state polymer electrolyte, Gel polymer electrolyte