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Back Cover: Low-Cost,High-Strength Cellulose-based Quasi-Solid Polymer Electrolyte for Solid-State Lithium-Metal Batteries (Angew. Chem. Int. Ed. 25/2023) |
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| Authors: | Dai Wang Hui Xie Qiang Liu Kexin Mu Zhennuo Song Weijian Xu Dr Lei Tian Prof Caizhen Zhu Prof Jian Xu |
| Institution: | 1. Institute of Low-Dimensional Materials Genome Initiative, College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen, 518060 P. R. China
These authors contributed equally to this work.;2. Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, Chengdu, 610041 China These authors contributed equally to this work.;3. Department of Mechanical Engineering, The Hong Kong Polytechnic University, Hong Kong, 100872 China;4. Institute of Low-Dimensional Materials Genome Initiative, College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen, 518060 P. R. China |
| Abstract: | Solid-state lithium-metal batteries are considered as the next generation of high-energy-density batteries. However, their solid electrolytes suffer from low ionic conductivity, poor interface performance, and high production costs, restricting their commercial application. Herein, a low-cost cellulose acetate-based quasi-solid composite polymer electrolyte (C-CLA QPE) was developed with a high Li+ transference number ( ) of 0.85 and excellent interface stability. The prepared LiFePO4 (LFP)|C-CLA QPE|Li batteries exhibited excellent cycle performance with a capacity retention of 97.7 % after 1200 cycles at 1 C and 25 °C. The experimental results and Density Function Theory (DFT) simulation revealed that the partially esterified side groups in the CLA matrix contribute to the migration of Li+ and enhance electrochemical stability. This work provides a promising strategy for fabricating cost-effective, stable polymer electrolytes for solid-state lithium batteries. |
| Keywords: | Capacity Retention High Ionic Conductivity Li+ Transference Number Low-Cost Quasi-Solid Polymer Electrolyte |