离子电池是通过碳封装液体金属阳极来制造的
Chenghao Huang1, Baiyu Guo2, Xiaodong Wang1
1International Center for New-Structured Materials (ICNSM), State Key Laboratory of Silicon Materials, and School of Materials Science and Engineering, Zhejiang University, Hangzhou, 310027, P.R. China.
Advanced materials (Deerfield Beach, Fla.)
|November 16, 2023
概括
-液体金属纳米粒子 (EGaIn@C LMNPs) 的碳封装增强了离子电池的稳定性. 这种新的方法提高了离子和离子系统的循环性能.
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
- 纳米技术纳米技术
背景情况:
- 基于的液体金属为离子电池提供了高的理论容量.
- 体积膨胀和不稳定的固体电解质相间限制液体金属阳极性能.
- 碳封装正在探索克服这些局限性.
研究的目的:
- 解决液体金属阳极中体积膨胀和不稳定的SEI薄膜的瓶.
- 为了提高-液体金属纳米粒子 (EGaIn@C LMNPs) 的电化学性能和循环稳定性.
- 研究碳封装液态金属阳极在离子和离子电池中的应用.
主要方法:
- 用碳封装的-液体金属纳米粒子 (EGaIn@C LMNPs) 的设计和合成.
- 电化学性能测试,包括离子和离子电池的周期稳定性和速率能力.
- 在现场传输电子显微镜 (TEM) 观察电化学反应期间的形态和相位变化.
主要成果:
- EGaIn@C LMNPs表现出卓越的循环稳定性:在800个循环后644mAhg-1 (离子) 和在2500个循环后87mAhg-1 (纳离子).
- 核心外结构有效地抑制了从~160%到127%的体积膨胀.
- 观察到改善的电导率,增强的电化学动力学和自我愈合现象.
结论:
- 碳封装是一种可行的策略,可以提高液体金属阳极的性能.
- EGaIn@C LMNPs为高性能,室温离子电池提供了一个有前途的解决方案.
- 这项工作为下一代储能器件中液体金属阳极的实际应用铺平了道路.
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