Improved Interfacial Compatibility and Ionic Conductivity of SnI4 Co-doping Li-Argyrodite Sulfide Electrolyte for All-Solid-State Lithium Batteries
Improved Interfacial Compatibility and Ionic Conductivity of SnI4 Co-doping Li-Argyrodite Sulfide Electrolyte for All-Solid-State Lithium Batteries
复制标题
DOI：
10.1016/j.jallcom.2023.172334
复制
发表时间：
2023-09
影响因子：
6.2
通讯作者：
Zhikai Huang;Zhihao Yan;Dingding Zhu;Xuedong Zhang;Shuaiyu He;Jianyu Huang;Guobao Xu
中科院分区：
文献类型：
--
作者：
Zhikai Huang;Zhihao Yan;Dingding Zhu;Xuedong Zhang;Shuaiyu He;Jianyu Huang;Guobao Xu
尽管锂-银矿电解质由于高离子电导率和相对较低的成本而引起了极大的关注，但其应用受到较差的空气稳定性和较差的Li相容性的阻碍。在此，我们报道了一种Sn/I共掺杂Li 6PS 5Cl的策略来克服上述障碍。优化后的LPSC-0.05SnI4在室温下具有3.9 × 10−3S cm− 1的高离子电导率，并改善了空气稳定性。更重要的是，通过LPSC-0.05SnI4引入锂阳极上原位形成的富Li I界面。因此，Li/LPSC-0.05SnI4/Li对称电池可提供1.45 mA cm− 2的高临界电流密度，以及在0.1 mA cm−2下超过6000 h的出色稳定Li电镀/剥离性能。组装的LNO@NMC811/LPSC-0.05SnI4/Li全固态电池显示出突出的容量和循环稳定性。本工作为设计多功能、高性能的硫化物基固体电解质提供了一种实用有效的方法。
Despite lithium-argyrodite electrolytes have attracted great attention due to the high ionic conductivity and relatively lower cost, their applications are hindered by the inferior air stability and poor Li compatibility. Herein, we report a Sn/I co-doping the Li6PS5Cl strategy to overcome above obstacles. The optimized LPSC-0.05SnI4exhibits high ionic conductivity of 3.9 × 10−3S cm−1at room temperature, and improved air stability. More importantly, an in situ formed LiI-rich interface on the lithium anode is introduced through the LPSC-0.05SnI4. As a result, the Li/LPSC-0.05SnI4/Li symmetric batteries deliver high critical current density of 1.45 mA cm−2and a remarkable steady Li plating/stripping performance over 6000 h at 0.1 mA cm−2. The assembled LNO@NMC811/LPSC-0.05SnI4/Li all-solid-state batteries display prominent capacity and cycling stability. This work provides a practical and effective method for designing versatile and high-performance sulfide-based solid electrolytes.