A Plastic–Crystal Electrolyte Interphase for All‐Solid‐State Sodium Batteries. (12th April 2017)

• Record Type: Journal Article
• Authors: Gao, Hongcai; Xue, Leigang; Xin, Sen; Park, Kyusung; Goodenough, John B.
• Is Part Of: Angewandte Chemie. Volume 129:Number 20(2017)
• Page Start: 5633
• Page End: 5637
• Publication Date: 2017-04-12
• Subjects: Feste Elektrolyte -- Festkörperbatterien -- Grenzflächenwiderstände -- Natriumbatterien -- Plastische Kristalle; Chemistry -- Periodicals; 540
• DOI: 10.1002/ange.201702003
• Languages: English
• ISSNs: 0044-8249

Abstract

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 Na3 Zr2 (Si2 PO4 ) 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.