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Improved Interface Stability and Room-Temperature Performance of Solid-State Lithium Batteries by Integrating Cathode/Electrolyte and Graphite Coating
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2020-03-24 , DOI: 10.1021/acsami.9b22690
Hao Chen 1 , Quan-yao Liu 1 , Mao-xiang Jing 1 , Fei Chen 1 , Wei-yong Yuan 2 , Bo-wei Ju 3 , Fei-yue Tu 3 , Xiang-qian Shen 1 , Shi-biao Qin 3
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2020-03-24 , DOI: 10.1021/acsami.9b22690
Hao Chen 1 , Quan-yao Liu 1 , Mao-xiang Jing 1 , Fei Chen 1 , Wei-yong Yuan 2 , Bo-wei Ju 3 , Fei-yue Tu 3 , Xiang-qian Shen 1 , Shi-biao Qin 3
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Poor interface stability is a crucial problem hindering the electrochemical performance of solid-state lithium batteries. In this work, a novel approach for interface stability was proposed to integrate the cathode/solid electrolyte by forming an electrolyte buffer layer on the rough surface of the cathode and coating a layer of graphite on the side of the electrolyte facing the lithium anode. This hybrid structure significantly improves the integration and the interface stability of the electrode/electrolyte. The interfacial resistance was dramatically reduced, the stability of the plating/stripping of Li metal was enhanced, and the growth of lithium dendrites was also inhibited due to the formation of the LiC6 transition layer. The obtained solid-state lithium battery shows enhanced rate performance at room temperature from 0.5 to 4 C and stable cycling performance at 1 C with a retention capacity of 100 mAh g–1 after 200 cycles. This integrated electrode/electrolyte design approach is expected to be widely used to improve interfacial stability and room-temperature electrochemical performance of solid-state batteries.
中文翻译：
通过集成阴极/电解质和石墨涂层，改善了固态锂电池的界面稳定性和室温性能
界面稳定性差是阻碍固态锂电池电化学性能的关键问题。在这项工作中，提出了一种新的界面稳定性方法，通过在阴极的粗糙表面上形成电解质缓冲层，并在电解质面对锂阳极的一侧涂覆一层石墨，从而整合阴极/固体电解质。这种混合结构显着改善了电极/电解质的集成度和界面稳定性。大大降低了界面电阻，增强了Li金属的电镀/剥离稳定性，并且由于形成了LiC 6也抑制了锂树枝状晶体的生长过渡层。所获得的固态锂电池在室温下从0.5至4 C表现出增强的倍率性能，在1 C下具有稳定的循环性能，在200次循环后的保持容量为100 mAh g –1。这种集成的电极/电解质设计方法有望被广泛用于提高固态电池的界面稳定性和室温电化学性能。
更新日期：2020-03-24
中文翻译：
通过集成阴极/电解质和石墨涂层，改善了固态锂电池的界面稳定性和室温性能
界面稳定性差是阻碍固态锂电池电化学性能的关键问题。在这项工作中，提出了一种新的界面稳定性方法，通过在阴极的粗糙表面上形成电解质缓冲层，并在电解质面对锂阳极的一侧涂覆一层石墨，从而整合阴极/固体电解质。这种混合结构显着改善了电极/电解质的集成度和界面稳定性。大大降低了界面电阻，增强了Li金属的电镀/剥离稳定性，并且由于形成了LiC 6也抑制了锂树枝状晶体的生长过渡层。所获得的固态锂电池在室温下从0.5至4 C表现出增强的倍率性能，在1 C下具有稳定的循环性能，在200次循环后的保持容量为100 mAh g –1。这种集成的电极/电解质设计方法有望被广泛用于提高固态电池的界面稳定性和室温电化学性能。
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