基于硫化物完全固态电池的高压和稳定的Co-free LiNiO正电极
Yue Wang1, Dixing Ni2, Huan Li1
1School of Chemical Engineering, The University of Adelaide, Adelaide, SA, Australia.
Nature communications
|March 9, 2026
概括
工程师开发了一种新的LiNiO2材料,用于高压全固态离子电池. 这一策略提高了结构稳定性和电解质兼容性,从而实现了高能量密度和长周期寿命.
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:
- 高压氧化 (LiNiO2) 对于高能量密度全固态离子电池至关重要.
- 实际应用受到结构疲劳和与固体电解质的界面兼容性差的限制.
- 在下一代电池中需要稳定,高性能正电极.
研究的目的:
- 为先进的全固态离子电池设计一个稳定的基于LiNiO2的正极.
- 克服阻碍实际应用的结构疲劳和接口问题.
- 为无电池材料开发一种通用的异相重建策略.
主要方法:
- 提出了一个通用的异相重建策略.
- 通过对 (Al) 和 (W) 进行注,工程化LiNi0.964Al0.03W0.006O2.
- 研究了W和Al对结构稳定性和与硫化物电解质的界面性能的协同作用.
主要成果:
- 实现了稳定的分层旋框架,增强了机械和化学完整性.
- 工程电极运行高达4.5V,在0.5°C下提供187.6 mAh g-1,在720个循环后保留122.1 mAh g-1.
- 在其他基于LiNiO2的系统中证明了该策略的普遍适用性.
结论:
- 异相重建策略有效地稳定了LiNiO2,提高了性能和循环寿命.
- 和的协同合产生了一个强大的电极,具有出色的界面兼容性.
- 这种可扩展的设计规则推进了无,高能耗和长寿命的全固态离子电池.
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