面向可充电的水性离子电池,提高整体性能:电解质与表面吸附剂添加剂
Yahui Wang1,2, Ran Zhao1,2, Jingjing Yang1
1Beijing Key Laboratory of Environmental Science and Engineering School of Materials Science & Engineering, Beijing Institute of Technology, Beijing, 100081, China.
Small (Weinheim an der Bergstrasse, Germany)
|October 4, 2024
概括
酸添加剂通过稳定阳极和阴极,防止树突和材料崩来增强水性离子电池. 这导致显著改善寿命和电化学性能,从而实现更安全,更高效的能源存储.
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) 提供安全性和成本优势,但受到电极退化的影响.
- 树突的生长,寄生反应和阴极材料的崩限制了AZIB的实际应用.
- 开发有效的策略,同时稳定阳极和阴极对于推进AZIB技术至关重要.
研究的目的:
- 为AZIBs引入D-xylose (DX) 作为多功能电解质添加剂.
- 研究DX提高阳极和阴极稳定的机制.
- 评估DX修改AZIBs的整体电化学性能提升.
主要方法:
- 电解质修饰用D-基 (DX) 来进行.
- 电化学测试Zn//Zn对称细胞和Zn光束MnO2全细胞.
- 对界面特性和电极材料稳定性的分析.
主要成果:
- 添加DX抑制了阳极的副作用反应,并通过结合和表面吸附调节了沉积.
- DX吸附增强了MnO2阴极上的界面电荷转移和活性位点.
- DX优化的 Zn//Zn 电池的寿命为 6912 h,累计容量为 17.28 Ah cm−2.2.
- 库伦比效率在2 mA cm−2时达到99.91%,而全电池的ZnRacidMnO2显示在5C时超过2000个循环.
结论:
- 基作为双重功能添加剂,同时提高了AZIB中的阳极和阴极性能.
- DX有效地减轻了关键故障机制,使得循环寿命延长和高效率.
- 这些发现强调DX作为开发实用和高性能水性离子电池的有希望的添加剂.
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