Jingzhen Du, Zhichao Chen, Bohao Peng, Zewen Sun, Wenzhuo Wu, Qi Zhou, Shuang Xia, Lili Liu, Lijun Fu, Yuhui Chen, Tao Wang and Yuping Wu
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引用次数: 0
Abstract
The key to the practical application of lithium metal batteries (LMBs) lies in developing solid state electrolytes (SSEs) that are simple to prepare and exhibit excellent performance. In this work, commercial and cheap cathode material LiMn2O4 (LMO) is used as an SSE and mixed with poly(vinylidene difluoride) (PVDF) to create SSEs aimed at improving interfacial stability and electronic insulation. The LMO-3 SSE, containing 30 wt% LMO, demonstrates high ionic conductivity (5.17 × 10−4 S cm−1 at 35 °C), low electronic conductivity (<10−9 S cm−1), and good interfacial contact and stability with both the lithium metal anode and LiFePO4 (LFP) cathode. The Li‖LFP cell with LMO-3 exhibits good cycling stability at a current density of 0.5C (200 cycles, maintaining a discharge specific capacity of 147.7 mA h g−1, with a capacity retention rate of 96.0% and a coulombic efficiency of 99.8%). This study provides a direction for the application of LMO in high-performance SSEs and LMBs, paving another economical route to the commercialization of solid-state lithium metal batteries.
期刊介绍:
The Journal of Materials Chemistry A, B & C covers a wide range of high-quality studies in the field of materials chemistry, with each section focusing on specific applications of the materials studied. Journal of Materials Chemistry A emphasizes applications in energy and sustainability, including topics such as artificial photosynthesis, batteries, and fuel cells. Journal of Materials Chemistry B focuses on applications in biology and medicine, while Journal of Materials Chemistry C covers applications in optical, magnetic, and electronic devices. Example topic areas within the scope of Journal of Materials Chemistry A include catalysis, green/sustainable materials, sensors, and water treatment, among others.