Study on preparation and performance of PEO-PVDF composite binder for lithium ion batteries

Abstract

PEO-PVDF composite binder was used to prepare lithium manganate positive pole piece and its phase and morphology were characterized by X-ray diffractometer (XRD) and scanning electron microscope (SEM). At the same time, CV, AC resistance and charge-discharge tests are used to perform electrochemical performance tests. The results appearanced that the specific discharge capacity of the battery declined from 113mAh / g to 88mAh / g after 150 cycles, and the Coulomb efficiency remains at about 99%. And the CV curve almost coincides with 100 times, which indicates excellent cycle performance.