Liang Xinghua, Jiang Xingtao, Lan Linxiao, Zeng Shuaibo, Huang Meihong, Huang Dongxue
Guangxi Key Laboratory of Automobile Components and Vehicle Technology, Guangxi University of Science and Technology, Liuzhou 545006, China.
China School of Automotive and Transportation Engineering, Guangdong Polytechnic Normal University, Guangzhou 510632, China.
Nanomaterials (Basel). 2022 Sep 3;12(17):3069. doi: 10.3390/nano12173069.
Solid-state lithium batteries have attracted much attention due to their special properties of high safety and high energy density. Among them, the polymer electrolyte membrane with high ionic conductivity and a wide electrochemical window is a key part to achieve stable cycling of solid-state batteries. However, the low ionic conductivity and the high interfacial resistance limit its practical application. This work deals with the preparation of a composite solid electrolyte with high mechanical flexibility and non-flammability. Firstly, the crystallinity of the polymer is reduced, and the fluidity of Li between the polymer segments is improved by tertiary polymer polymerization. Then, lithium salt is added to form a solpolymer solution to provide Li and anion and then an inorganic solid electrolyte is added. As a result, the composite solid electrolyte has a Li conductivity (3.18 × 10 mS cm). The (LiNiMnO)LNMO/SPLL (PES-PVC-PVDF-LiBF-LAZTP)/Li battery has a capacity retention rate of 98.4% after 100 cycles, which is much higher than that without inorganic oxides. This research provides an important reference for developing all-solid-state batteries in the greenhouse.
固态锂电池因其高安全性和高能量密度的特殊性能而备受关注。其中，具有高离子电导率和宽电化学窗口的聚合物电解质膜是实现固态电池稳定循环的关键部分。然而，低离子电导率和高界面电阻限制了其实际应用。这项工作致力于制备具有高机械柔韧性和不可燃性的复合固体电解质。首先，通过三元聚合物聚合降低聚合物的结晶度，提高锂在聚合物链段间的流动性。然后，添加锂盐形成溶胶-聚合物溶液以提供锂离子和阴离子，接着加入无机固体电解质。结果，复合固体电解质具有锂离子电导率（3.18×10 mS cm）。(LiNiMnO)LNMO/SPLL（聚醚砜-聚氯乙烯-聚偏氟乙烯-LiBF-镧锆钛酸铝）/锂电池在100次循环后容量保持率为98.4%，远高于不含无机氧化物的电池。该研究为在温室中开发全固态电池提供了重要参考。
