在全固态电池中的多晶丰富氧化物的初级粒子间边界增强离子传输
Lin Yuan1, Wenjie Peng1, Ziyang Zhan1
1Central South University, School of Metallurgy and Environment, CHINA.
Angewandte Chemie (International ed. in English)
|June 18, 2025
概括
一种新的低温联合烧结方法将固态电解质与富氧化物阴极集成为先进的全固态电池. 这提高了离子传输和电池性能,克服了储能方面的关键局限性.
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
- 固态化学 固态化学
背景情况:
- 多晶丰富氧化物 (PLRO) 为下一代全固态电池 (ASSB) 提供了高容量.
- 由于电解质的限制,缓慢的Li+运输和界面副作用反应限制了ASSB中的PLRO性能.
研究的目的:
- 为集成的PLRO复合阴极开发一个单阶段的低温共烧结工艺.
- 增强基于PLRO的ASSB中的Li+运输和抑制界面副作用.
主要方法:
- 采用了一种新的低温 (<200°C) 联合烧结工艺.
- 该过程同时合成了固态电解质 (SE),并透了PLRO粒子间边界.
- 使用能量波段调制来抑制氧气释放和界面相位转换.
主要成果:
- 创建了一个带有连续Li+运输网络的集成复合材料阴极.
- 基于PLRO的ASSB实现了高放电能力 (271mAhg-1在0.1C,212mAhg-1在0.5C).
- 电池在150个循环后保持了80.0%的容量,显示出更好的稳定性.
结论:
- 同烧结过程有效地克服了PLRO阴极中的Li+运输限制.
- 这种方法显著提高了基于PLRO的ASSB的电化学性能和稳定性.
- 这项研究为推进高性能固态电池技术提供了实用策略.
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