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Stable Interface between Lithium and Electrolyte Facilitated by a Nanocomposite Protective Layer
Small Methods ( IF 10.7 ) Pub Date : 2020-01-20 , DOI: 10.1002/smtd.201900751 Luyi Yang 1 , Yongli Song 1 , Hao Liu 1 , Zijian Wang 1 , Kai Yang 1 , Qinghe Zhao 1 , Yanhui Cui 1 , Jiayun Wen 2 , Wei Luo 2 , Feng Pan 1
Small Methods ( IF 10.7 ) Pub Date : 2020-01-20 , DOI: 10.1002/smtd.201900751 Luyi Yang 1 , Yongli Song 1 , Hao Liu 1 , Zijian Wang 1 , Kai Yang 1 , Qinghe Zhao 1 , Yanhui Cui 1 , Jiayun Wen 2 , Wei Luo 2 , Feng Pan 1
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Recently, solid‐state lithium batteries (SSLBs) have been considered an ideal solution for the practical application of lithium (Li) metal batteries owing to the excellent safety features of solid‐state electrolytes (SSEs). Among various SSEs, Na superionic conductor (NASICON)‐type Li1+xAlxTi2−x(PO4)3 (LATP) holds great potential for its high ionic conductivity, low costs, and high stability. However, LATP tends to be reduced by metallic Li upon contact, posing a major challenge. Herein, a novel coating strategy is proposed to form a nanocomposite protecting layer on Li metal within 30 s. Such a protecting layer not only acts as an artificial solid‐electrolyte interface to conduct Li ion transportation that remains stable after repeated cycling but also effectively precludes the interfacial reaction between Li and LATP by inhibiting the interfacial electron transfer. As a result, the Li/LATP/Li symmetric cells exhibit excellent cycling stability for over 300 h of continuous Li plating/stripping. The assembled full‐cell using coated Li also shows high capacity retention after 500 cycles. Overall, this study demonstrates a facile and transferable method to reduce the reactivity of Li metal anode toward solid electrolytes with relatively high reduction potentials.
中文翻译：
纳米复合保护层促进锂与电解质之间的稳定界面
近年来，由于固态电解质（SSE）的出色安全性能，固态锂电池（SSLB）被认为是锂（Li）金属电池实际应用的理想解决方案。在各种SSE中，Na超离子导体（NASICON）型Li 1+ x Al x Ti 2− x（PO 4）3（LATP）具有高离子电导率，低成本和高稳定性的巨大潜力。然而，金属锂在接触时往往会降低LATP，这是一个重大挑战。本文提出了一种新颖的涂覆策略，以在30 s内在Li金属上形成纳米复合材料保护层。这样的保护层不仅充当人造的固体电解质界面，以进行锂离子运输（在反复循环后保持稳定），而且还通过抑制界面电子转移有效地阻止了Li与LATP之间的界面反应。结果，Li / LATP / Li对称电池在超过300小时的连续Li电镀/剥离过程中表现出出色的循环稳定性。使用涂有锂的锂电池组装的全电池在500次循环后也显示出高容量保持能力。总体，
更新日期：2020-01-21
中文翻译：
纳米复合保护层促进锂与电解质之间的稳定界面
近年来，由于固态电解质（SSE）的出色安全性能，固态锂电池（SSLB）被认为是锂（Li）金属电池实际应用的理想解决方案。在各种SSE中，Na超离子导体（NASICON）型Li 1+ x Al x Ti 2− x（PO 4）3（LATP）具有高离子电导率，低成本和高稳定性的巨大潜力。然而，金属锂在接触时往往会降低LATP，这是一个重大挑战。本文提出了一种新颖的涂覆策略，以在30 s内在Li金属上形成纳米复合材料保护层。这样的保护层不仅充当人造的固体电解质界面，以进行锂离子运输（在反复循环后保持稳定），而且还通过抑制界面电子转移有效地阻止了Li与LATP之间的界面反应。结果，Li / LATP / Li对称电池在超过300小时的连续Li电镀/剥离过程中表现出出色的循环稳定性。使用涂有锂的锂电池组装的全电池在500次循环后也显示出高容量保持能力。总体，
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