改善高性能双离子电池中阴极电解质间相的策略
Yitao He1,2, Zhipeng Chen1, Yaohui Zhang3
1Department of New Energy Science and Engineering, School of Energy and Environment, Anhui University of Technology, Ma'anshan, Anhui, China.
iScience
|August 22, 2024
概括
双离子电池 (DIB) 的能量密度很高,但其石墨阴极容量和稳定性较低. 增强正极电解质间相 (CEI) 的策略是提高DIB性能的关键.
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:
- 双离子电池 (DIB) 通过利用阳离子和阴离子间隙,提供高能量密度.
- 石墨是DIB的成本效益高的阴极材料,但其放电能力低,循环稳定性差.
- 石墨上的阴极电解质介面 (CEI) 对于阳离子储存和整体DIB稳定性至关重要.
研究的目的:
- 审查在双离子电池 (DIB) 中增强阴极电解质介面 (CEI) 的策略.
- 解决石墨阴极的局限性,包括容量低和循环稳定性差.
- 为未来的CEI开发研究提供洞察力,以改进DIB技术.
主要方法:
- 对DIB中CEI形成和修改的现有文献的审查.
- 分析包括添加剂,结合剂,电解质,兴奋剂,人工CEI和表面修饰在内的策略.
- 在离子传输,溶解和结构稳定性方面对CEI改进的评估.
主要成果:
- 各种策略可以显著提高石墨阴极上的CEI层的质量.
- 改进的CEI促进了更快的离子运输和更好的离子溶解.
- 增强的CEI有助于提高石墨阴极的结构稳定性.
结论:
- 加强CEI对于克服DIB中石墨阴极的容量和稳定性限制至关重要.
- 优化CEI组件和修改策略对于推进DIB技术至关重要.
- 对CEI材料和改进技术的进一步研究将加速DIB的发展.
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