journal article·2023-09Open access

Engineering the Structural Uniformity of Gel Polymer Electrolytes via Pattern‐Guided Alignment for Durable, Safe Solid‐State Lithium Metal Batteries

Qi Kang, Zechao Zhuang, Yijie Liu, Zhenhui Liu, Yong Li, Bin Sun, Fei Pei, Han Zhu, Hongfei Li, Pengli Li, Ying Lin, Kunming Shi, Yingke Zhu, Jie Chen, Chaoqun Shi, Yan Zhao, Pingkai Jiang, Yongyao Xia, Dingsheng Wang, Xingyi Huang

Advanced Materials· Volume 35· Issue 38

Abstract

Abstract Ultrathin and super‐toughness gel polymer electrolytes (GPEs) are the key enabling technology for durable, safe, and high‐energy density solid‐state lithium metal batteries (SSLMBs) but extremely challenging. However, GPEs with limited uniformity and continuity exhibit an uneven Li+ flux distribution, leading to nonuniform deposition. Herein, a fiber patterning strategy for developing and engineering ultrathin (16 µm) fibrous GPEs with high ionic conductivity (≈0.4 mS cm−1) and superior mechanical toughness (≈613%) for durable and safe SSLMBs is proposed. The special patterned structure provides fast Li+ transport channels and tailoring solvation structure of traditional LiPF6‐based carbonate electrolyte, enabling rapid ionic transfer kinetics and uniform Li+ flux, and boosting stability against Li anodes, thus realizing ultralong Li plating/stripping in the symmetrical cell over 3000 h at 1.0 mA cm−2, 1.0 mAh cm−2. Moreover, the SSLMBs with high LiFePO4 loading of 10.58 mg cm−2 deliver ultralong stable cycling life over 1570 cycles at 1.0 C with 92.5% capacity retention and excellent rate capacity of 129.8 mAh g−1 at 5.0 C with a cut‐off voltage of 4.2 V (100% depth‐of‐discharge). Patterned GPEs systems are powerful strategies for producing durable and safe SSLMBs.
Source: crossref · Quality: baseline

Research context

OpenAlex topics: Advanced Battery Materials and Technologies · Advancements in Battery Materials · Advanced Battery Technologies Research

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Department of Polymer Science and Engineering Shanghai Key Laboratory of Electrical Insulation and Thermal Ageing School of Chemistry and Chemical Engineering State Key Laboratory of Metal Matrix Composites Shanghai Jiao Tong University Shanghai 200240 China

Department of Chemistry Tsinghua University Beijing 100084 China

Department of Chemical Engineering Columbia University New York NY 10027 USA

College of Material Science and Engineering Nanjing University of Aeronautics and Astronautics Nanjing 210016 China

Institute of Applied and Physical Chemistry and Center for Environmental Research and Sustainable Technology University of Bremen 28359 Bremen Germany

College of Electronics and Information Qingdao University Qingdao 266071 China

Weihai Innovation Research Institute of Qingdao University Weihai 264200 China

State Key Laboratory of Material Processing and Die & Mould Technology School of Materials Science and Engineering Huazhong University of Science and Technology Wuhan 430074 China

Key Laboratory of Synthetic and Biological Colloids Ministry of Education School of Chemical and Material Engineering Jiangnan University Wuxi 214122 China

School of Electrical Engineering Xi'an Jiaotong University Xi'an 710049 China

College of Materials Science and Engineering Sichuan University Chengdu 610065 China

Institute of Technological Science Wuhan University Wuhan 430070 China

Funding

National Natural Science Foundation of China · Program of Shanghai Academic Research Leader

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