Revealing the Solid‐State Electrolyte Interfacial Stability Model with Na–K Liquid Alloy
Revealing the Solid‐State Electrolyte Interfacial Stability Model with Na–K Liquid Alloy
复制标题
揭示 Na-K 液体合金的固态电解质界面稳定性模型
DOI：
10.1002/anie.202203409
复制
发表时间：
2022
期刊：
影响因子：
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通讯作者：
Yu, Guihua
中科院分区：
文献类型：
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作者：
Guo, Xuelin;Liu, Yijie;Zhang, Xiao;Ju, Zhengyu;Li, Yutao;Mitlin, David;Yu, Guihua
在这项工作中，开发了具有电荷选择性界面层的Na-K液体合金，以在钠超离子导体固态电解质（NASICON SSE）上实现令人印象深刻的长循环寿命和小过电位。以这种独特的多阳离子体系为平台，我们进一步提出了一个包含化学分解域和动力学分解域的界面稳定性模型。在此基础上，提出了以动态化学动力学平衡和电化学动力学为控制方式的两种电荷选择机制，并通过电化学测量和微观及光谱表征进行了验证。这项研究为碱性Na-K阳极的高能量密度固态电池提供了一种有效的设计，同时也为理解界面化学过程提供了一种新的方法，可以启发和指导未来的设计。
In this work, the Na–K liquid alloy with a charge selective interfacial layer is developed to achieve an impressively long cycling life with small overpotential on a sodium super‐ionic conductor solid‐state electrolyte (NASICON SSE). With this unique multi‐cation system as the platform, we further propose a unique model that contains a chemical decomposition domain and a kinetic decomposition domain for the interfacial stability model. Based on this model, two charge selection mechanisms are proposed with dynamic chemical kinetic equilibrium and electrochemical kinetics as the manners of control, respectively, and both are validated by the electrochemical measurements with microscopic and spectroscopic characterizations. This study provides an effective design for high‐energy‐density solid‐state battery with alkali Na–K anode, but also presents a novel approach to understand the interfacial chemical processes that could inspire and guide future designs.