Ameliorating the Interfacial Problems of Cathode and Solid‐State Electrolytes by Interface Modification of Functional Polymers |
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Authors: | Li‐Ping Wang Xu‐Dong Zhang Tai‐Shan Wang Ya‐Xia Yin Ji‐Lei Shi Chun‐Ru Wang Yu‐Guo Guo |
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Affiliation: | 1. Key Laboratory of Molecular Nanostructure and Nanotechnology, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry Chinese Academy of Sciences (CAS), Beijing, P. R. China;2. School of Chemistry and Chemical Engineering, University of Chinese Academy of Sciences, Beijing, P. R. China |
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Abstract: | Solid‐state Li secondary batteries may become high energy density storage devices for the next generation of electric vehicles, depending on the compatibility of electrode materials and suitable solid electrolytes. Specifically, it is a great challenge to obtain a stable interface between these solid electrolytes and cathodes. Herein, this issue can be effectively addressed by constructing a poly(acrylonitrile‐co‐butadiene) coated layer onto the surface of LiNi0.6Mn0.2Co0.2O2 cathode materials. The polymer layer plays a vital role in working as a protective shell to retard side reaction and ameliorate the contact of the solid–solid interface during the cycling process. In the resultant solid‐state batteries, both rate capacity (99 mA h g?1 at 3 C) and cycling stability (75% capacity retention after 400 cycles) are improved after coating. This impressive performance highlights the great importance of layer modification in the cathode and inspires the development of solid‐state batteries toward practical applications. |
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Keywords: | cathodes interface contacts poly(acrylonitrile‐co‐butadiene) surface coatings |
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