水性离子电池在一个中性电解质内,基于一个CoFe-Cl分层双氧化阳极
Zelin Wu1, Yunjia Wu1, Qingyan Yuan1
1State Key Laboratory of Chemical Resource Engineering, Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, P. R. China.
ACS applied materials & interfaces
|August 7, 2023
概括
这项研究引入了一种新的阳极材料,CoFe-Cl-LDH/CNT,用于水离子电池 (ACIB). 这种材料在海水淡化应用中表现出色,为绿色能源需求提供了有前途的解决方案.
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 (ACIB) 正成为一种安全和环保的储能技术.
- ACIB显示了海洋海水淡化应用的潜力,解决了绿色能源需求.
- 开发高性能阳极材料对于推进ACIB技术至关重要.
研究的目的:
- 为ACIBs合成和演示一种新的复合阳极材料.
- 为了研究合成材料在中性NaCl水溶液中的离子储存性能.
- 探索这种材料在海水淡化应用中的潜力.
主要方法:
- 一种复合材料的合成:与碳纳米管 (CNTs) 交叉连接的Cl-接的CoFe层状双氧化物 (CoFe-Cl-LDH).
- 在ACIB中作为阳极的CoFe-Cl-LDH/CNT复合物的电化学表征.
- 分析充/放电性能,容量保留和电流密度的影响.
主要成果:
- CoFe-Cl-LDH/CNT复合物表现出高初始容量,约为190 mAh g-1在200 mA g-1.1时.
- 在200 mA g-1.1的200个循环后,维持了~125 mAh g-1的可逆容量.
- 这种材料保持了约120mAhg-1的容量,即使在400mAg-1.1的高电流密度下也是如此.
- 这一性能归因于CNT的高化学转化和增强的电子导电性.
- 观察到间层H2O的可逆插入/提取,这可能会在循环中提高容量.
结论:
- 合成的Cl-插曲的LDH材料是ACIBs的高性能阳极.
- 该材料证明了离子捕获/释放在水性阴离子型电池中的可行性.
- 这项工作为开发ACIB和水淡化技术提供了新的机会.
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