对高压水性铜电池的操纵协调环境
Xiangyong Zhang1,2, Hua Wei1,2, Shizhen Li1,2
1College of Materials Science and Engineering, Shenzhen University, 518055, Shenzhen, China.
Nature communications
|October 24, 2023
概括
研究人员开发了一种使用离子来降低水性电池中铜电极的氧化还原潜力的新策略. 这大大提高了电池电压和能量,实现了1.3V的放电电压和高稳定性.
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:
- 水性铜基电池具有优势,但由于铜电极的高氧化还原潜力,由于低工作电压而受到限制.
- 本质的负电极电位为0.34V与SHE相比,限制了这些系统的总体电压和能量密度.
研究的目的:
- 通过电解质改性来降低水性铜基电池中的内在负电极氧化还原潜力.
- 提高水性铜电池的工作电压和储能能力.
主要方法:
- 使用化物 (Cl-) 离子制造电解质量调整,为铜离子创造一个特定的协调环境.
- 中间Cu+离子的稳定和电化学过程的解成不同的Cu2+/Cu+和Cu+/Cu0氧化还原反应.
- 开发和测试使用Cl-/Cl0氧化还原对的水性铜电池.
主要成果:
- 与Cl-离子的协调与水的协调相比,降低了Cu+/Cu0氧化还原潜力约0.3V.
- 铜电池实现了1.3V的高放电电压.
- 该电池表现出卓越的循环稳定性,在10,000个循环后保留了77.4%的初始容量,并改善了铜利用率和氧化还原动力学.
结论:
- 通过Cl-离子协调进行电解质工程是一种有效的策略,可以降低铜电极潜力并提高水性电池电压.
- 开发的水性铜电池显示出对高性能储能应用的前景.
- 这种方法为开发高压和高能水性铜电池开辟了新的途径.
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