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阳离子调节工程使得具有超高容量的高可逆性和无金金属阳极成为可能
Mingming Wang1, Yahan Meng1, Pengfei Gao2,3
1Department of Applied Chemistry, School of Chemistry and Materials Science, Hefei National Research Center for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui, 230026, China.
Advanced materials (Deerfield Beach, Fla.)
|July 17, 2023
概括
研究人员开发了无金无金属阳极,具有超高容量用于储能. 水性电解质中的离子使得性能具有高度可逆性,为先进的电池铺平了道路.
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:
- 开发安全的高能金属阳极对于下一代能源存储至关重要.
- 过渡金属阳极常常患有树突形成和容量有限的问题.
- 水性电解质提供了一个更安全的替代品,但面临着阳极稳定性的挑战.
研究的目的:
- 为了实现高可逆性,无树的过渡金属阳极,具有超高容量.
- 研究电解质添加剂在稳定金属阳极中的作用.
- 为了证明改性阳极在实际电池应用中的潜力.
主要方法:
- 利用理论和实验方法研究水性电解质中的 (Ni) 阳极.
- 研究了离子对氧化被动化层的影响.
- 使用开发的Ni阳极制造并测试了全细胞.
主要成果:
- 证明化物离子抑制和破坏氧化被动化层.
- 实现了具有超高面积容量1000 mAh cm-2和体积容量6000 mAh cm-3的Ni阳极.
- 实现了99.4%的库伦比克效率,并在完整的细胞中证明了长周期寿命 (Ni-MnO: 2000 个周期; Ni-PbO: 200 mAh cm-2).
结论:
- 在水性电解质中离子调节是一种可行的策略,用于开发无树,高容量的Ni阳极.
- 开发的阳极显著超过当前最先进的金属电极.
- 这项工作为推进各种储能应用的金属阳极开辟了新的途径.
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