基于化的阳极对水性可充电电池中各种金属的普遍性
Leilei Li1,2, Hai Ming2, Junli Zhang1
1Key Laboratory for Magnetism and Magnetic Materials of the Ministry of Education, School of Physical Science and Technology, Lanzhou University, Lanzhou 730000, China.
ACS applied materials & interfaces
|August 24, 2023
概括
聚2,5-二基-1,4-基-3,6-甲) (PDBM) 显示出高性能水性可充电电池 (ARB) 的多功能阴离子协调. 这种PDBM材料能够安全,经济高效地储存能量,具有显著的容量和寿命.
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
- 储能 储能 储能 储能 储能 储能
背景情况:
- 水性可充电电池 (ARB) 需要安全,可持续和具有成本效益的电极材料.
- 聚2,5-二基-1,4-基-3,6-甲 (PDBM) 是ARB的有望有机材料,因为它具有可逆的阴离子协调.
- 将PDBM的电化学性能与金属离子特性联系在一起的详细机制仍然不完全理解.
研究的目的:
- 研究PDBM与水性电解质中的各种的普遍协调行为.
- 阐明控制PDBM电化学性能的离子协调机制.
- 为优化基于PDBM的ARB建立结构-属性关系.
主要方法:
- 用各种单和多价值 (Na +,Mg2 +,Ca2 +,Zn2 +,Al3 +等) 进行PDBM电化学测试. ) 的情况.
- 对离子协调点和结合能量的分析.
- 阴离子特性与特定容量,速率能力和循环稳定性的相关性.
主要成果:
- PDBM证明了与广泛的子的可逆协调,实现了高特异性容量 (>200 mA hg-1),优异的速率能力 (~20 C) 和长周期寿命 (5000 个周期).
- 揭示了一种前所未有的离子协调机制:单价离子偏好在平面内的位置,而多价离子占据平面之外的位置,利用更活跃的PDBM站点来实现更高的容量.
- PDBM的氧化还原潜力与阴离子-PDBM结合能相反相关.
结论:
- 对于离子协调,PDBM表现出了显著的普遍性,使其高度适应各种ARB化学物质.
- 单价和多价的不同协调偏好提供了一个调整PDBM性能的途径.
- PDBM的特性由阴离子结合能量调节,为设计高安全性,低成本,长寿命的电网规模储能ARB提供战略.
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