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没有树的Zn阳极,为长周期水性Zn离子电池提供简单的Al复合涂层
Wangsheng Yuan1, Ye Yuan1, Junwei Wu1
1State Key Laboratory of Materials-Oriented Chemical Engineering, College of Energy Science and Engineering, and School of Mechanical and Power Engineering, Nanjing Tech University, Nanjing 211816, Jiangsu, China.
ACS applied materials & interfaces
|November 9, 2023
概括
在阳极上用复合物 (Al-complex) 制成的人造界面层,防止副作用和状物生长. 这提高了离子电池的寿命和稳定性.
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:
- 电池中的金属阳极遭受副作用反应和树突形成,限制电池寿命.
- 开发稳定且持久的电池对于储能应用至关重要.
研究的目的:
- 在阳极上创建一个稳定的人工接口层,以提高电池性能.
- 研究Al-复合层对沉积和电池周期寿命的影响.
主要方法:
- 使用一种低成本,可扩展的化学方法,在阳极表面 (Al-complex@Zn) 构建了一个Al-复合体接口层.
- 修改后的阳极在Zn//Zn对称细胞和全细胞配置 (Al-complex@Zn//NaV3O8·1.5H2O) 中进行了测试.
主要成果:
- 该Al-复合物层提高了电解质的湿透性,并作为对副作用的物理屏障.
- 实现了均的离子沉积,导致对称细胞的超长周期寿命为2400小时和低极化 (20mV).
- 全细胞在1000个循环中显示出高容量保留 (92.5%).
结论:
- 复合体接口层是一种简单且具有成本效益的策略,可以提高阳极的稳定性和性能.
- 这种方法显著延长了水性离子电池的循环寿命,为储能提供了一个有前途的解决方案.
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