A solid-state lithium metal battery with extended cycling and rate performance using a low-melting alloy interface,Inorganic Chemistry Frontiers

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A solid-state lithium metal battery with extended cycling and rate performance using a low-melting alloy interface
Inorganic Chemistry Frontiers ( IF 6.1 ) Pub Date : 2022-12-23 , DOI: 10.1039/d2qi02127g
Tingting Luo ₁ , Ling Wang ₁ , Lei Dai ₁ , Jiayan Luo ₂ , Shan Liu ₁

Affiliation

Solid-state Li metal batteries (SSLMBs) have practical value in terms of operational application because of their superior energy density and security. However, the instability and inferior wettability of the interface between the Li metal anode and electrolyte lead to high interfacial impedance, which significantly impedes their practical applications. This study constructed a low-melting alloy interlayer using a facile in situ reaction for SSLMBs. The results demonstrate that the battery with the low-melting alloy interlayer (Ga–In–Sn–Li) exhibits excellent cycling and rate performance because of its excellent chemical stability and mechanical properties. Symmetrical cells with low-melting point alloy interlayers could stably cycle for over 1200 hours with low overpotential and critical current density as high as 2.2 mA cm⁻². This novel and feasible strategy has laid a solid foundation for the practical application of SSLMBs, and it has a certain universality for other solid-state batteries.

中文翻译：

使用低熔点合金界面具有延长循环和倍率性能的固态锂金属电池

固态锂金属电池（SSLMBs）由于其优越的能量密度和安全性，在操作应用方面具有实用价值。然而，锂金属负极和电解质之间界面的不稳定性和较差的润湿性导致高界面阻抗，这严重阻碍了它们的实际应用。本研究使用简便的原位方法构建了低熔点合金夹层SSLMBs 的反应。结果表明，具有低熔点合金夹层（Ga-In-Sn-Li）的电池因其优异的化学稳定性和机械性能而表现出优异的循环和倍率性能。具有低熔点合金夹层的对称电池可以稳定循环超过1200小时，具有低过电位和高达2.2 mA cm ^-2的临界电流密度。这种新颖可行的策略为SSLMBs的实际应用奠定了坚实的基础，对其他固态电池具有一定的普适性。

更新日期：2022-12-23

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