凝胶电解质软包钠离子电池的研究

Exploration of Gel-electrolyte Soft Package Sodium-ion Battery

近年来,钠离子电池因其在成本和低温性能方面具有独特优势而被广泛关注.由于层状氧化物正极与锂离子电池三元正极材料类似的制备工艺被率先推出,并将其与硬碳负极搭配组建钠离子电池.但是,由于钠离子电池层状氧化物残碱高、稳定性欠缺,在长循环过程中易引发电解液氧化分解而导致电芯产气,限制了软包钠离子电池的应用.本文采用凝胶电解质策略构建了凝胶电解质软包钠离子电池,并研究了该电池的电化学性能.结果表明,凝胶电解质对抑制电芯循环产气有显著作用,同时可以提高电芯的安全性能.

Sodium-ion battery has been widely concerned in recent years because of its unique advantages in low-cost and work in low-temperature environment.The layered oxide cathode is first introduced due to its preparation process similar to that of the LiNi_(x)CoyM_(1-x-y)O_(2)(NCM)cathode material.However,due to the high residual alkali of sodium base layered oxide cathode and the lack of stability,it is easy to lead to the oxidation and decomposition of electrolyte in the long cycling test,which leads to gas production in the cell,limiting the application and development of soft package sodium-ion battery.In this work,the strategy of gel electrolyte was used to construct gel electrolyte soft package sodium-ion battery.The results show that the gel electrolyte has a significant role in inhibiting the gas production of the cell cycle,and can improve the safety performance of the cell,which provides a new idea for the development of soft packed sodium-ion battery.