The Addition of Powders in Solid-State Electrolyte Lithium Battery

Abstract

The solid-state lithium batteries had attracted lots of research and industry efforts in past decades. The advantages of developing solid-state lithium batteries are safety and higher energy density; however, the poor ionic conductivity is the toughest problem. In order to solve this problem, we utilized three different ceramic powders added in our polymer electrolytes. We used galvanostatic charging/discharging, electrochemical impedance spectroscopy (EIS), and cyclic voltammetry (CV) to measure the electrical characteristics of TiO2-SiO2 core-shell, ZrO2 and BaTiO3 nanoparticles added polymer electrolytes, respectively. The results showed the ionic conductivity of the 1 wt.% TiO2-SiO2 core-shell added polymer electrolyte was 1.8×10-4 S/cm, which was 12% more than the polymer electrolyte without adding nanoparticles. The TiO2-SiO2 core-shell nanoparticles added polymer electrolyte also showed faster charge transfer speed than other polymer electrolytes. The capacity retention was 54% at 1C-rate for the polymer electrolyte with 1 wt.% TiO2-SiO2 core-shell nanoparticles, which had the best performance at high C-rate. Figure 1