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A Plastic–Crystal Electrolyte Interphase for All‐Solid‐State Sodium Batteries
Author(s) -
Gao Hongcai,
Xue Leigang,
Xin Sen,
Park Kyusung,
Goodenough John B.
Publication year - 2017
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201702003
Subject(s) - electrolyte , interphase , cathode , materials science , electrochemistry , chemical engineering , battery (electricity) , fast ion conductor , crystal (programming language) , plastic crystal , chemistry , electrode , phase (matter) , organic chemistry , thermodynamics , power (physics) , genetics , physics , computer science , engineering , biology , programming language
Abstract The development of all‐solid‐state rechargeable batteries is plagued by a large interfacial resistance between a solid cathode and a solid electrolyte that increases with each charge–discharge cycle. The introduction of a plastic–crystal electrolyte interphase between a solid electrolyte and solid cathode particles reduces the interfacial resistance, increases the cycle life, and allows a high rate performance. Comparison of solid‐state sodium cells with 1) solid electrolyte Na 3 Zr 2 (Si 2 PO 4 ) particles versus 2) plastic–crystal electrolyte in the cathode composites shows that the former suffers from a huge irreversible capacity loss on cycling whereas the latter exhibits a dramatically improved electrochemical performance with retention of capacity for over 100 cycles and cycling at 5 C rate. The application of a plastic–crystal electrolyte interphase between a solid electrolyte and a solid cathode may be extended to other all‐solid‐state battery cells.