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一种高的混合离子和电子导体,用于加速所有固态金属电池中的阴极动力学

Xiangkun Kong^1,2, Zongzi Jin^1,2, Linwang Chen^1,2

¹State Key Laboratory of Precision and Intelligent Chemistry, University of Science and Technology of China, Hefei, Anhui, 230026, China.

Science advances

|November 12, 2025

概括

研究人员开发了一种全新的高混合离子和电子导体 (HE-O-MIEC),用于所有固态金属电池. 这种材料增强了电子和离子传输,提高了电池的性能和稳定性.

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:

在所有固态金属电池 (ASSLMB) 中,电子和离子运输对正极动态至关重要.
传统的复合材料策略创造了具有挑战性的固态接口,阻碍了载体的移动性.
开发高效的离子和电子导体是推动ASSLMB技术发展的关键.

研究的目的:

为ASSLMB阴极引入一种新的高混合离子和电子导体 (HE-O-MIEC).
研究HE-O-MIEC的电化学特性和界面兼容性.
为了证明使用新型导体的ASSLMB的性能提升.

主要方法:

一个高的混合离子和电子导体 (HE-O-MIEC) 的合成,Li_1/6-x(LaPrNdSrBa)_1/6CoO_3-δ.
在室温下电子和电导率的表征.
使用HE-O-MIEC阴极和Li_6.4La₃Zr_1.4Ta_0.6O₁₂电解质的ASSLMB的组装和电化学测试.

主要成果:

该HE-O-MIEC实现了高电子导电性 (1150S/cm) 和显著的Li+导电性 (2.3×10−4S/cm).
增强的Li+导电性归因于高的配置,促进溶解性和Li+度.
ASSLMB的初始放电容量为115 mAh/g,在没有外部压力或有机电解质的500个循环后保持了83%的容量.

结论:

开发的HE-O-MIEC材料有效地促进ASSLMBs中均质的电子和离子运输.
这种材料对提高活性材料利用率和克服陶基ASSLMB的界面挑战具有前景.
这些发现突显了下一代固态电池中高材料的潜力.

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