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固体缓冲体的水解使高性能水性离子电池成为可能
Hao Cheng1,2,3, Shichao Zhang1, Wenxuan Guo4
1State Key Laboratory of Chemical Engineering, Institute of Pharmaceutical Engineering, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, 310027, P.R. China.
Advanced science (Weinheim, Baden-Wurttemberg, Germany)
|December 8, 2023
概括
在水性电池中使用黑 (BP) 的新型水解策略创建了一个保护性酸层. 这显著提高了阳极稳定性和电池寿命,克服了常见的接口问题.
科学领域:
- 电化学 电化学 电化学
- 材料科学 材料科学 材料科学
- 储能 储能 储能 储能 储能 储能
背景情况:
- 水性离子电池 (AZIB) 提供安全性和低成本,但受到阳极/电解质接口 (AEI) 不稳定的影响.
- 关键的挑战包括的进化,腐蚀,树的生长和AEI的副产品积累.
研究的目的:
- 开发一个全面和持久的解决方案来解决AEI在AZIB的问题.
- 调查黑 (BP) 水解在现场SEI形成和稳定中的使用.
主要方法:
- 在水性电解质中利用二维层状黑 (BP) 作为水解固体缓冲剂.
- 分析了富含酸 (ZPO) 的固体电解质介相 (SEI) 层的形成.
- 评估了BP修饰分离器在Zn的对称细胞和V2O5·nH2O//Zn全细胞中的性能.
主要成果:
- BP的水解产生了酸,形成了富含ZPO的SEI层,抑制了树的生长,腐蚀和的进化.
- 酸稳定了当地的pH值,防止了性副产品的积累.
- 经过BP修改的分离器在对称细胞中证明了超过十倍的寿命增长.
- 高负荷V2O5·nH2O阴极显示在硬币和袋式电池中的累积容量显著提高.
结论:
- 石油化策略提供了一种持久且有效的方法来稳定AZIB中的AEI.
- 这种方法为预先构建的SEI层或电解质添加剂提供了优质的替代方案.
- 开发的技术显著推进了高性能和持久的水性离子电池的实际应用.
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