DataVXAdvanced Functional MaterialsPaper
journal article·2023-07Open access

Self‐Polarized Organic–Inorganic Hybrid Ferroelectric Cathode Coatings Assisted High Performance All‐Solid‐State Lithium Battery

Wenru Li, Shu Zhang, Weijie Zheng, Jun Ma, Lin Li, Yue Zheng, Deye Sun, Zheng Wen, Zhen Liu, Yaojin Wang, Guangzu Zhang, Guanglei Cui

Advanced Functional Materials· Volume 33· Issue 27
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Source abstract

Abstract

Abstract Ferroelectrics can significantly boost electrochemical performances of all‐solid‐state batteries by constructing built‐in electric field to reduce the space charge layer at cathode/solid‐state electrolyte interface. However, the construction mechanism of ferroelectric built‐in electric field is poorly understood. Herein, the guanidinium perchlorate (GClO4) ferroelectrics as the cathode coatings in the LiCoO2‐based all‐solid‐state lithium battery are reported, which has state‐of‐the‐art specific capacity of 210.6 mAh g−1 (91.6% of the liquid battery). Systematic studies reveal that the flexoelectric effect originating from the lattice mismatch between GClO4 and LiCoO2 gives GClO4 coatings the single‐domain state and upward self‐polarization. Consequently, a vertically downward built‐in electric field is generated relative to the cathode, which transports the lithium ions inside the electrolyte to the three‐phase interface to alleviate the space charge layer. These findings highlight that the microstructural characteristics of ferroelectric and electrode materials are the primary concern for building an effective built‐in electric field.
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Research context

Energy storageElectronic materials

OpenAlex topics: Advanced Battery Materials and Technologies · Conducting polymers and applications · Advancements in Battery Materials

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

Affiliations

Qingdao Industrial Energy Storage Research Institute Qingdao Institute of Bioenergy and Bioprocess Technology Chinese Academy of Sciences Qingdao 266101 China

College of Physics and Center for Marine Observation and Communications Qingdao University Qingdao 266071 China

Shandong Energy Institute Qingdao 266101 China

School of Materials Science and Engineering Nanjing University of Science and Technology Nanjing Jiangsu 210094 China

School of Optical and Electronic Information and Wuhan National Laboratory for Optoelectronics Huazhong University of Science and Technology Wuhan Hubei 430074 China

Funding

National Natural Science Foundation of China · Natural Science Foundation of Shandong Province · China Postdoctoral Science Foundation · Natural Science Foundation of Jiangsu Province · Taishan Scholar Foundation of Shandong Province · Postdoctoral Innovation Project of Shandong Province

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