用于可充电固态锂离子电池的三维电纺LiLaZrTaO-聚（偏二氟乙烯-六氟丙烯）凝胶聚合物电解质
A Three-Dimensional Electrospun LiLaZrTaO-Poly (Vinylidene Fluoride-Hexafluoropropylene) Gel Polymer Electrolyte for Rechargeable Solid-State Lithium Ion Batteries.
作者信息
Wang Donghuang, Cai Dan, Zhong Yu, Jiang Zhao, Zhang Shengzhao, Xia Xinhui, Wang Xiuli, Tu Jinagping
机构信息
State Key Laboratory of Silicon Materials, Key Laboratory of Advanced Materials and Applications for Batteries of Zhejiang Province, and School of Materials Science and Engineering, Zhejiang University, Hangzhou, China.
Yangtze Delta Region Institute (Huzhou), University of Electronic Science and Technology of China, Huzhou, China.
出版信息
Front Chem. 2021 Oct 4;9:751476. doi: 10.3389/fchem.2021.751476. eCollection 2021.
Developing high-quality solid-state electrolytes is important for producing next-generation safe and stable solid-state lithium-ion batteries. Herein, a three-dimensional highly porous polymer electrolyte based on poly (vinylidenefluoride-hexafluoropropylene) (PVDF-HFP) with LiLaZrTaO (LLZTO) nanoparticle fillers (PVDF-HFP-LLZTO) is prepared using the electrospinning technique. The PVDF-HFP-LLZTO gel polymer electrolyte possesses a high ionic conductivity of 9.44 × 10 S cm and a Li-ion transference number of 0.66, which can be ascribed that the 3D hierarchical nanostructure with abundant porosity promotes the liquid electrolyte uptake and wetting, and LLZTO nanoparticles fillers decrease the crystallinity of PVDF-HFP. Thus, the solid-state lithium battery with LiFePO cathode, PVDF-HFP-LLZTO electrolyte, and Li metal anode exhibits enhanced electrochemical performance with improved cycling stability.
开发高质量的固态电解质对于生产下一代安全稳定的固态锂离子电池至关重要。在此，采用静电纺丝技术制备了一种基于聚（偏二氟乙烯-六氟丙烯）（PVDF-HFP）并含有LiLaZrTaO（LLZTO）纳米颗粒填料（PVDF-HFP-LLZTO）的三维高度多孔聚合物电解质。PVDF-HFP-LLZTO凝胶聚合物电解质具有9.44×10 S cm的高离子电导率和0.66的锂离子迁移数，这可归因于具有丰富孔隙率的三维分级纳米结构促进了液体电解质的吸收和润湿，并且LLZTO纳米颗粒填料降低了PVDF-HFP的结晶度。因此，具有LiFePO正极、PVDF-HFP-LLZTO电解质和锂金属负极的固态锂电池表现出增强的电化学性能和改善的循环稳定性。
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