酸对通过水媒合成制备高性能Li3InCl6固态电解质的作用
Shuqing Wen1, Hualin Sheng1, Songsheng Zheng1
1College of Energy, Xiamen University, Xiamen 361002, China.
Materials (Basel, Switzerland)
|May 14, 2025
概括
研究人员使用酸增强了固态电解质 (Li3InCl6) . 优化的电解质显示出高离子导电性和稳定的电池性能,为先进的离子电池铺平了道路.
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:
- 化物固态电解质对于下一代离子电池至关重要.
- Li3InCl6 (LIC) 显示出有希望的结果,但需要提高导电性.
- 提高离子导电性是释放固态电解质潜力的关键.
研究的目的:
- 研究酸 (H3PO4) 对Li3InCl6 (LIC) 离子导电性的影响.
- 优化LIC准备,以提高离子电池性能.
- 要了解由H3PO4加法引起的结构变化.
主要方法:
- 合成Li3InCl6与不同的度的H3PO4.
- 测量已准备的LIC样本的离子导电性.
- 组装和测试全固态电池 (LiCoO2-LIC/LIC-1%H3PO4/Li6PS5Cl/In/Li) 和对称电池 (Li-In/LPSC/LIC-1%H3PO4/LPSC/Li-In) 进行测试.
- 使用像XRD (隐含) 这样的技术分析LIC样本的结构组成.
主要成果:
- 用1%的H3PO4制备的LIC表现出最高的离子导电性 (1.15 × 10-3 S/cm) 与最小的杂质.
- 完全固态电池在30°C下经过14个周期的稳定循环,初始充电容量高 (128mAh/g在0.05°C).
- 对称细胞在各种电流密度 (0.05,0.1和0.3 mA/cm2) 时显示出稳定的循环性能.
结论:
- 在LIC制备过程中添加H3PO4显著提高了离子导电性.
- 在H3PO4修改后的LIC中存在LiIn(P2O7) 的存在有助于通过空缺空间改善Li+运输.
- 使用1%H3PO4的优化LIC是高性能固态离子电池的可行候选者.
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