A Plastic–Crystal Electrolyte Interphase for All-Solid-State Sodium Batteries

Angewandte Chemie - International Edition

5 years ago

A Plastic–Crystal Electrolyte Interphase for All-Solid-State Sodium Batteries

Leigang Xue, Hongcai Gao, John B. Goodenough, Sen Xin, Kyusung Park

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 Na3Zr2(Si2PO4) 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. Set interphase to stun: The cathode interfacial resistance in an all-solid-state sodium battery is dramatically reduced by application of a plastic–crystal electrolyte interphase between the cathode particles and the solid electrolyte. A solid-state sodium battery with the plastic–crystal electrolyte in the cathode exhibits a stable cycle performance and an excellent rate capability.

Publisher URL: http://onlinelibrary.wiley.com/resolve/doi

DOI: 10.1002/anie.201702003