在坚固的道框架中储存Zn2+的原子尺度分析
Kaiyue Zhu1,2, Hongxin Wang1,2, Weikang Jiang1,3
1State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences Dalian 116023 China yangws@dicp.ac.cn.
Chemical science
|August 25, 2023
概括
MoVTe氧化物 (MVT-M1) 能够在水性离子电池 (ZIB) 中有效和可逆地储存离子. 这种新的阴极材料表现出卓越的循环稳定性,并允许对存储机制进行原子规模的可视化.
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:
- 先进的水性离子电池 (ZIB) 需要高效的阴极材料来快速和可逆的离子 (Zn2+) 存储.
- 以前的阴极框架缺乏结构稳定性,掩盖了Zn2+存储机制,并阻碍了ZIB的发展.
研究的目的:
- 调查M1相的MoVTe氧化物 (MVT-M1) 作为ZIBs的阴极材料的潜力.
- 在原子尺度上阐明MVT-M1中Zn2+存储机制.
主要方法:
- 高角环状暗场扫描传输电子显微镜 (HAADF-STEM) 用于原子尺度成像 Zn 2+ 的插入/提取.
- 飞行时间二次离子质谱 (ToF-SIMS) 用于深度分析离子分布.
- 电化学循环,以评估循环稳定性和性能.
主要成果:
- MVT-M1展示了强大的道,促进可逆Zn2+插入/提取和良好的循环稳定性.
- 原子规模的HAADF-STEM直接可视化了MVT-M1道内的Zn2+储存.
- ToF-SIMS证实了层次的Zn2+储存,从表面到散装.
- MVT-M1的性能优于M2相MoVTe氧化物和M1相MoV氧化物,这是由于道的宽度和Te的存在.
结论:
- MVT-M1是ZIB的有希望的阴极材料,提供了增强的循环稳定性.
- 这项研究提供了前所未有的原子层面的洞察力,了解氧化物阴极中的Zn2+储存机制.
- 这些发现为设计优化用于电池中高效Zn2+储存的先进材料铺平了道路.
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