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Ameliorating the Interfacial Problems of Cathode and Solid‐State Electrolytes by Interface Modification of Functional Polymers
Author(s) -
Wang LiPing,
Zhang XuDong,
Wang TaiShan,
Yin YaXia,
Shi JiLei,
Wang ChunRu,
Guo YuGuo
Publication year - 2018
Publication title -
advanced energy materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.08
H-Index - 220
eISSN - 1614-6840
pISSN - 1614-6832
DOI - 10.1002/aenm.201801528
Subject(s) - materials science , cathode , electrolyte , surface modification , polymer , coating , polymer electrolytes , acrylonitrile , solid state , chemical engineering , fast ion conductor , nanotechnology , layer (electronics) , energy storage , compatibility (geochemistry) , electrode , composite material , engineering physics , electrical engineering , ionic conductivity , chemistry , copolymer , engineering , power (physics) , physics , quantum mechanics
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 LiNi 0.6 Mn 0.2 Co 0.2 O 2 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.