在双盐聚合物电解质中增强接口稳定性和电化学性能的工作机制,具有现场电解质-阴极集成
Zehua Chen1, Shengguang Qi1, Wenwu Zou1
1Guangdong Provincial Key Laboratory of Fuel Cell Technology and School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, 510641, China.
Chemistry (Weinheim an der Bergstrasse, Germany)
|March 5, 2025
概括
双盐复合体固体电解质 (CSEs) 与二二氧化 (LiDFOB) 提高所有固态电池 (ASSLB) 的性能. 这一策略提高了电极兼容性和电池稳定性,克服了接口阻抗问题.
科学领域:
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
- 聚合物科学 聚合物科学
背景情况:
- 固体聚合物电解质 (SPEs) 提供了灵活性和可加工性,但存在界面不兼容性,导致电池中的高阻抗和容量衰减.
- 电极/电解质接口是固态电池的性能和寿命的关键瓶.
研究的目的:
- 开发一种双盐复合体固体电解质 (CSE) 具有集成的电解质/阴极结构,用于增强的所有固态电池 (ASSLB).
- 通过建立一个稳定的固体电解质接口 (SEI) 层来提高电极/电解质兼容性和电化学性能.
主要方法:
- 现场紫外线 (UV) 光聚合被用于合成CSEs.
- 二氧化玻酸盐 (LiDFOB) 被纳入作为双盐添加剂.
- 电化学性能通过使用Li红色体的对称细胞和LiFePO4红色体的细胞进行评估.
主要成果:
- 添加LiDFOB有助于在电化学还原过程中形成一个坚固,稳定和低阻力的SEI层.
- 在0.1mA/cm2的电流密度下,基二氧化对称细胞在2000多小时内表现出稳定的循环运行.
- 在60°C的100个循环后,LiFePO4adjusaLi电池在0.5°C时表现出高达155mAh/g的高放电容量和90%以上的容量保留.
结论:
- 开发的CSE策略有效地提高了电极与基于聚乙烯基醇烯酸盐 (PEGAs) 的电解质的兼容性.
- 纳入LiDFOB对于建立一个稳定的SEI层至关重要,大大提高了ASSLB的业绩.
- 这种方法为推进高性能固态电池提供了一个简单而有前途的途径.
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