液体金属诱导的自我愈合接口和3D多孔配置使离子存储的高性能Si/碳阳极成为可能
Zhongling Cheng1, Cheng Tang2, Shaohua Long1
1Institute of Nanochemistry and Nanobiology, School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, P. R. China.
ACS nano
|February 13, 2026
概括
在/碳复合材料中集成的-液体金属 (GaIn LMs) 通过管理应力和改善离子传输来提高电池阳极性能,从而提高稳定性和储能能力.
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
- 纳米技术 纳米技术
背景情况:
- 基于的液态金属 (LMs) 为电极材料提供动态适应性和导电性.
- 传统的LM制造产生大颗粒,阻碍了离子扩散.
- 阳极在循环过程中面临体积膨胀和结构降解的挑战.
研究的目的:
- 为先进的电池阳极设计一种与-合金 (GaIn-Si@PCC) 结合的新型/碳复合材料.
- 为了解决基于的阳极的离子扩散性差和结构不稳定性问题.
- 为了利用LM的独特特性,提高电化学性能.
主要方法:
- 使用双碳前体,冷干燥和热减少制造3D多孔/碳复合材料.
- 纳米颗粒的封装在一个由GaIn LMs装饰的多孔碳框架内.
- 使用理论计算来分析离子吸附-扩散和电子结构.
主要成果:
- 该 GaIn 阶段通过塑性变形和自我愈合有效地减轻了化应激.
- 建立了一个连续导电网络,并优化了Li+运输.
- 该GaIn-Si@PCC阳极表现出高的初始库伦比克效率 (87.3%) 和出色的循环稳定性 (200个循环后1595.4 mAh g-1).
- 一个装有NCM811阴极的全电池在100个循环后保持了86.8%的容量.
结论:
- 开发的GaIn-Si@PCC复合材料为高性能阳极提供了多尺度设计策略.
- 动态应力管理和GaIn LM的离子调节显著提高了电池性能.
- 这种方法为创建稳定高效的基于的储能系统提供了一条途径.
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