Texas Materials Institute, The University of Texas at Austin, Austin, TX, 78712, USA.
Angew Chem Int Ed Engl. 2017 May 8;56(20):5541-5545. doi: 10.1002/anie.201702003. Epub 2017 Apr 12.
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 Zr (Si PO ) 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.
全固态可充电电池的发展受到固体阴极和固体电解质之间大界面电阻的困扰，该界面电阻随着每一次充放电循环而增加。在固体电解质和固体阴极颗粒之间引入塑料晶体电解质中间相可以降低界面电阻，增加循环寿命，并允许实现高倍率性能。将具有 1）固体电解质 NaZr(SiPO)颗粒的固态钠电池与 2）阴极复合材料中的塑料晶体电解质进行比较表明，前者在循环过程中会遭受巨大的不可逆容量损失，而后者则表现出显著改善的电化学性能，容量保持超过 100 次循环，并且在 5C 倍率下循环。在固体电解质和固体阴极之间应用塑料晶体电解质中间相可以扩展到其他全固态电池。
