ELECTROLYTE AND SECONDARY BATTERY

• Main Authors: LI XINHAI, PENG WENJIE, WANG ZHIXING, YAN GUOCHUN, GUO HUAJUN, LI GUANGCHAO, DUAN HUI, WANG SIWU, WANG JIEXI
• Format: Patent
• Language: Chinese; English
• Published: 07.03.2025
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

According to the electrolyte provided by the invention, the long-carbon-chain ester compound containing X-O (X = S, P or B) is added into the electrolyte as the first additive, the amine compound with a specific structure is added as the second additive, and the first additive and the amine compound cooperate with each other, so that a stable interface can be constructed, acidic impurities in the electrolyte are removed, and the service life of the electrolyte is prolonged. And the long cycle performance and the electrochemical performance of the battery at normal temperature and high temperature are greatly improved. 本发明提供一种电解液，在电解液中添加包含X-O（X=S、P、B）的长碳链酯类化合物作为第一添加剂，添加特定结构的胺类化合物作为第二添加剂，两者协同，能构建稳定的界面，清除电解液中的酸性杂质，极大提高电池在常温和高温下的长循环性能和电化学性能。