LiPO2F2 as an effective additive to improve SEI performance of graphite electrodes

Abstract

Solid Electrolyte Interphase (SEI) have the crucial impact on lithium ion batteries In this work we use lithium difluorophosphate (LiPO2F2) as an electrolyte additive to modify SEI performance on graphite electrode and figure out its working mechanism The SEI film formation and properties was measured by electrochemical and microscopy techniques such as electrochemical impedance spectroscopy (EIS) and cyclic voltammetry (CV) The morphology of SEI is analyzed by scanning electron microscope (SEM) and transmission electron microscope (TEM) Through all measurements to speculate the reason of its contribution to higher capacity and better cycling performance

Date of Award	2020
Original language	English
Supervisor	Jow-Lay Huang (Supervisor)