High-voltage-resistant zinc salt electrolyte and application thereof

• Main Authors: CUI HAORAN, CHEN XUQUAN, DONG TIANTIAN
• Format: Patent
• Language: Chinese; English
• Published: 16.11.2021
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

The invention belongs to the technical field of electrochemical energy storage, and particularly relates to a high-voltage-resistant zinc salt electrolyte and application thereof to a dual-ion battery composed of a zinc negative electrode and a graphite positive electrode. The electrolyte is composed of a zinc salt and an organic solvent, and the organic solvent is a dinitrile group-containing solvent. Compared with the existing zinc salt electrolyte, the zinc salt electrolyte provided by the invention has very high oxidation stability, can significantly improve the Coulombic efficiency and cycle performance of a high-voltage dual-ion battery composed of a zinc negative electrode and a graphite positive electrode, and has a good application prospect in the field of large-scale energy storage. 本发明属于电化学储能技术领域，具体涉及一种耐受高电压锌盐电解液以及应用于锌负极和石墨正极组成的双离子电池。电解液由锌盐和有机溶剂组成，所述的有机溶剂为含二腈基的溶剂。与现有的锌盐电解液相比，本发明的锌盐电解液具有非常高的氧化稳定性，能显著提升锌负极和石墨正极组成的高电压双离子电池的库伦效率和循环性能，在规模储能领域具有良好的应用前景。