解锁锂金属电池的循环寿命

Zheng Li, Chang-Xin Zhao, Yuchen Niu, Dejian Dong, Tengrui Wang, Yue Li, Nan Zhang, Yawei Chen, Pei Li, Weiran Zhang, Joseph Burke Roschella, Xilin Chen, Fu Chen, Yijie Liu, Ai-Min Li, Chunsheng Wang* INTRODUCTION: High-energy lithium-metal batteries (LMBs) can surpass the energy density limits of lithium-ion batteries (LIBs), but their limited cycle life remains a major barrier to practical implementation. Lithium Coulombic efficiency (Li CE), which measures the efficiency of lithium plating and stripping, generally remains below 99.8%. More importantly, it does not reliably predict cell lifetime or guide electrolyte design. Unlike the relatively stable solid electrolyte interphase (SEI) on graphite in LIBs, the SEI on lithium metal continuously fractures and reforms during cycling, consuming both active lithium and electrolytes. …