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Updated: Jun 11, 2025

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用于全固态电池的丰富的基阴极的散装/接口结构设计
Wei-Jin Kong1, Chen-Zi Zhao1, Liang Shen1
1Tsinghua Center for Green Chemical Engineering Electrification (CCEE), Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology, Department of Chemical Engineering, Tsinghua University, Beijing 100084, China.
Journal of the American Chemical Society
|October 2, 2024
概括
将Li2WO4引入基于的阴极材料 (LRMO) 可以提高全固态电池的导电性和接口稳定性. 这提高了先进电池应用的能量密度和循环寿命.
科学领域:
- 材料科学
- 电化学
- 能量储存
背景情况:
- 丰富的基于的正极材料 (LRMO) 显示出高能量密度全固态电池 (ASSB) 的潜力.
- 电导率差和接口不稳定性阻碍了ASSB中的LRMO性能.
研究的目的:
- 为LRMO阴极设计现场散装/接口结构,以创建高效的Li+/e-通路.
- 提高ASSB的LRMO阴极的导电性和界面稳定性.
主要方法:
- 通过现场结构设计将Li2WO4引入LRMO阴极.
- 对+迁移,表面氧结构稳定性和氧氧还原性的研究.
- 用修改的LRMO阴极进行ASSB的制造和电化学测试.
主要成果:
- 引入Li2WO4减少了Li+迁移的能量障碍,并稳定了表面的氧结构.
- 改善了氧氧还原的可逆性,并显著地解决了LRMO阴极中的电压衰变.
- 增强的散装结构和高压界面稳定性,导致高面积容量 (~3.15 mAh/cm2) 和超过1200个循环,保持84.1%.
结论:
- 现场散装/接口结构设计策略有效地提高了ASSB的LRMO阴极性能.
- 实现了超稳定的高压接口和高负载复合电极,用于先进的能量存储.
- 这项工作为开发下一代高性能ASSB的LRMO阴极材料提供了洞察力.
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