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丰富的层氧化物阴极材料的表面和接口调制:进展和挑战
Tao Peng1, Yanshuo Zhao1, Qi Liu1
1School of Material Science and Engineering, Beijing Institute of Technology, Beijing, 100081, China.
Small (Weinheim an der Bergstrasse, Germany)
|March 28, 2025
概括
富层氧化物 (LLOs) 阴极为离子电池提供高能量密度. 表面修改和电解质设计是克服诸如电压色和提高实用应用稳定性等挑战的关键.
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:
- 富层氧化物 (LLOs) 是下一代离子电池的有希望的阴极材料,因为它们的能量密度和容量很高.
- 然而,实际应用受限于诸如电压色,初始库伦比效率低,循环稳定性差等问题,这些问题通常是由氧气损失和相位转换引起的.
研究的目的:
- 本综述侧重于表面和界面修改技术的最新进展,以应对阻碍LLO业绩的挑战.
- 它还探讨了电解质设计策略,以提高稳定性和兼容性.
主要方法:
- 讨论的表面修改技术包括表面兴奋剂,涂层和氧气空缺工程.
- 此外,还评估了螺旋相工程和混合涂层层.
- 研究了电解质设计中的进展,以稳定LLOs/电解质接口并形成稳定的CEI.
主要成果:
- 表面和界面的修改有效地减轻了电压色,并提高了循环稳定性.
- 氧空位工程和旋转相策略显示了提高电化学性能的潜力.
- 优化的电解质设计有助于减少副作用和提高容量保留.
结论:
- 表面和界面工程,以及先进的电解质设计,对于克服LLOs的局限性至关重要.
- 需要进一步的研究来改善长期循环稳定性,以便在实际的电池系统中得到广泛采用.
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