Preparation method of sodium-ion battery electrolyte

• Main Authors: SHAO JUNHUA, HUANG ZANLIN, WANG MIAO, LI HAIJIE, CHENG YONG, HAN ZIYI, HAN CHEN, UMEKUNI KEI, YE LI, ZHANG LIJUAN, LIANG YANHONG, KONG DONGBO, WANG YAZHOU, CHEN PEI, ZHU MINGXING, WU KANG, ZHANG YONGLAI, ZHAN XINYU
• Format: Patent
• Language: Chinese; English
• Published: 09.05.2023
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

The invention discloses a preparation method of a sodium-ion battery electrolyte, which comprises the following specific steps: adding a sodium salt into an organic solvent, and fully and uniformly stirring to obtain the required sodium-ion battery electrolyte. In the sodium-ion battery electrolyte provided by the invention, the sodium salt is dissolved in the organic solvent consisting of the methyl ethyl carbonate, the propylene carbonate and the dimethyl carbonate, so that the electrolyte has relatively high conductivity and relatively low viscosity, the electrolyte shows excellent performance when being applied to a sodium-ion battery, and after more than 120 times of circulation, the sodium-ion battery has a relatively high conductivity and relatively low viscosity. The lithium ion secondary battery can show extremely low polarization and excellent capacity retention, and has satisfactory coulombic efficiency (greater than 98%) and very good power performance. 本发明公开了一种钠离子电池电解液的制备方法，具体步骤如下：将钠盐加入有机溶剂中，充分搅拌