State Analysis of Positive Electrode Active Material in Lithium Ion Battery

Introduction

Lithium ion batteries are a type of storage battery in which charging and discharging of the battery take place by desorption/insertion of lithium ions (Li+ ) from inside the structure of the active material. In recent years, the applications of lithium ion batteries have expanded dramatically, and active research is underway with the aims of achieving higher capacity, longer life, lower cost, and improved safety. The main materials of a lithium ion battery can be divided into the positive electrode, negative electrode, separator, and electrolytic solution. Among these, the active materials which are the main constituent materials of the electrodes are important elements for improving battery performance. This article introduces an example of analysis to evaluate the chemical bonding state of the active material of the positive electrode of a lithium ion battery using a Shimadzu EPMA-8050G EPMA™ electron probe microanalyzer.

November 20, 2020 GMT