Mechanistic insight into the impact of pre-lithiation on the cycling stability of lithium-ion battery

Pre-lithiation is critical for improving the energy density of lithium-ion batteries (LIBs) in practical applications. The pre-lithiation of the high-capacity anode with a large surface area enhances the initial coulombic efficiency (ICE) by compensating the lithium loss from the formation of solid electrolyte interphase (SEI). However, pre-lithiation also affects cycle life, which has been paid little attention to. Here, we first discuss the impact of pre-lithiation on the cycling stability of the full cells, which is closely related to anode material, the degree of pre-lithiation, and the stability of SEI. Then we provide suggestions on how to achieve both high energy density and long cycle life by pre-lithiation. The understanding of the correlation between pre-lithiation and cycling stability sheds light on achieving the optimal performance of lithium-ion batteries from pre-lithiation technology.

Automated summary

Pre-lithiation is crucial for improving the performance of lithium-ion batteries, including increasing energy density and enhancing initial coulombic efficiency. However, it also affects the cycle life of the batteries. Therefore, finding a balance between high energy density and long cycle life is important.