Zhao Yangmingyue, Li Libo, Shan Yuhang, Zhou Da, Chen Xiaochuan, Cui Wenjun, Wang Heng
School of Materials Science and Chemical Engineering, Harbin University of Science and Technology, Harbin, 150040, China.
Small. 2023 Sep;19(39):e2301572. doi: 10.1002/smll.202301572. Epub 2023 May 26.
Solid-state lithium-ion batteries (SLIBs) are the promising development direction for future power sources because of their high energy density and reliable safety. To optimize the ionic conductivity at room temperature (RT) and charge/discharge performance to obtain reusable polymer electrolytes (PEs), polyvinylidene fluoride (PVDF), and poly(vinylidene fluoride-hexafluoro propylene) (P(VDF-HFP)) copolymer combined with polymerized methyl methacrylate (MMA) monomers are used as substrates to prepare PE (LiTFSI/OMMT/PVDF/P(VDF-HFP)/PMMA [LOPPM]). LOPPM has interconnected lithium-ion 3D network channels. The organic-modified montmorillonite (OMMT) is rich in the Lewis acid centers, which promoted lithium salt dissociation. LOPPM PE possessed high ionic conductivity of 1.1 × 10 S cm and a lithium-ion transference number of 0.54. The capacity retention of the battery remained 100% after 100 cycles at RT and 0.5 C. The initial capacity of one with the second-recycled LOPPM PE is 123.9 mAh g . This work offered a feasible pathway for developing high-performance and reusable LIBs.
固态锂离子电池（SLIBs）因其高能量密度和可靠的安全性，是未来电源颇具前景的发展方向。为了优化室温（RT）下的离子电导率和充放电性能以获得可重复使用的聚合物电解质（PEs），聚偏氟乙烯（PVDF）和聚（偏氟乙烯-六氟丙烯）（P(VDF-HFP)）共聚物与聚合甲基丙烯酸甲酯（MMA）单体结合用作基材来制备PE（LiTFSI/OMMT/PVDF/P(VDF-HFP)/PMMA [LOPPM]）。LOPPM具有相互连接的锂离子三维网络通道。有机改性蒙脱土（OMMT）富含路易斯酸中心，可促进锂盐解离。LOPPM PE具有1.1×10 S cm的高离子电导率和0.54的锂离子迁移数。在室温下以0.5 C进行100次循环后，电池的容量保持率仍为100%。使用二次回收的LOPPM PE的电池初始容量为123.9 mAh g 。这项工作为开发高性能和可重复使用的锂离子电池提供了一条可行的途径。
