DataVXAdvanced Energy MaterialsPaper
journal article·2023-03

Designing Bidirectionally Functional Polymer Electrolytes for Stable Solid Lithium Metal Batteries

Qiang Ma, Sha Fu, An‐Jun Wu, Qi Deng, Wei‐Dong Li, Dan Yue, Bing Zhang, Xiong‐Wei Wu, Zhen‐Ling Wang, Yu‐Guo Guo

Advanced Energy Materials· Volume 13· Issue 11
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Source abstract

Abstract

Abstract The development of high energy density lithium metal batteries has been retarded by the uncontrolled lithium dendrite formation and unstable Ni‐rich cathode–electrolyte interface (CEI). Herein, the bidirectionally functional polymer electrolytes (BDFPE) are designed via direct UV solidification of functional polymer species on electrode surfaces to simultaneously handle the interface issues faced by anodes and cathodes. By constructing the BDFPE, a smooth and dendrite‐free lithium deposition is enabled for Li||Li symmetry cells after 1800 h ultralong cycling at 1 mA cm−2 and 1 mAh cm−2, which are attributed to the fast ion conductivity (5.84 × 10−4 S cm−1), high Li+ transfer number (0.69) of BDFPE and low interfacial resistance between electrode and solid electrolytes. Furthermore, Li||LiNi0.6Co0.2Mn0.2O2 batteries demonstrate a favorable cycling and rate capability, and a stable and phosphate‐based CEI layer is constructed in situ. DFT studies reveal that the functional additives FEC and TEP participate in the interface formation. The finding provides a promising design strategy to accommodate the anode and cathode interfaces for high energy density lithium metal batteries.
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Research context

Energy storagePolymersMaterials processing

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

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

Affiliations

College of Materials Engineering Henan International Joint Laboratory of Rare Earth Composite Materials Henan University of Engineering Zhengzhou Henan 451191 P. R. China

School of Chemistry and Materials Science Hunan Agricultural University Changsha Hunan 410125 P. R. China

Hunan Province Yin Feng New Energy Co. Ltd Changsha Hunan 410019 P. R. China

State Key Laboratory of Utilization of Woody Oil Resource of China Hunan Provincial Key Laboratory of Oils and Fats Molecular Structure and Function Hunan Academy of Forestry Changsha Hunan 410018 P. R. China

CAS Key Laboratory of Molecular Nanostructure and Nanotechnology CAS Research/Education Center for Excellence in Molecular Sciences Beijing National Laboratory for Molecular Sciences (BNLMS) Institute of Chemistry Chinese Academy of Sciences (CAS) Beijing 100190 P. R. China

University of Chinese Academy of Sciences (UCAS) Beijing 100049 P. R. China

Funding

National Natural Science Foundation of China · Natural Science Foundation of Beijing Municipality

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