扩大化物基固体电解质的相位空间:Li-Mg-Zr-Cl螺旋体
Christopher L Rom1, Philip Yox2, Abby M Cardoza2
1National Renewable Energy Laboratory, Golden, Colorado 80401, United States.
Chemistry of materials : a publication of the American Chemical Society
|August 19, 2024
概括
研究人员使用丰富的和开发了新的基于的固体电解质. 这些材料显示出低成本,全固态电池的潜力,尽管导电性需要进一步优化.
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
- 固态电池是一种固态电池.
背景情况:
- 基于的固体电解质提供高离子导电性和与所有固态电池的高压阴极的兼容性.
- 目前的主要材料依赖于昂贵和稀缺的三价金属,如,和.
研究的目的:
- 为了探索化物固体电解质的替代,地球上丰富的元素.
- 通过混合二价和四价金属合成和表征新型化物固体电解质.
- 为了研究异价替代对离子导电性的影响.
主要方法:
- 合成具有旋转晶体结构的Li2Mg1/3Zr1/3Cl4.
- 与Li2Sc2/3Cl4.4的离子导电率进行比较.
- 在Li2-xMg1-x/3Zrx/3Cl4系列中进行了价替代研究.
主要成果:
- 与Li2Sc2/3Cl4相比,Li2Mg1/3Zr1/3Cl4的离子导电率较低 (30°C时为0.028毫秒/厘米),而Li2Sc2/3Cl4 (30°C时为1.6毫秒/厘米).
- 在Li2Mg1 / 3Zr1 / 3Cl4中出现了无序的Mg2 + 和Zr4 + 排列,建议阻碍Li + 离子迁移.
- 替代,增加Zr4+含量,通过引入Li+空缺增加了离子导电性.
结论:
- 使用混合二价和四价金属为开发基于化物的固体电解质提供了新的途径.
- 通过异替代的进一步优化对于改善离子导电性至关重要.
- 这项研究为具有成本效益的固态电池铺平了道路.
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