Defect-rich potassium amide: A new solid-state potassium ion electrolyte  

作　　者：Jiang Wang Gangtie Lei Teng He Hujun Cao Ping Chen 

机构地区：[1]Dalian Institute of Chemical Physics,Chinese Academy of Sciences,Dalian 116023,Liaoning,China [2]Key Laboratory of Environmentally Friendly Chemistry and Applications of Ministry of Education,School of Chemistry,Xiangtan University,Xiangtan 411105,Hunan,China

出　　处：《Journal of Energy Chemistry》2022年第6期555-560,I0015,共7页能源化学（英文版）

基　　金：supported by the Key R&D Program of Shandong Province China (2020CXGC010402);the National Natural Science Foundation of China (51801197);the Youth Innovation Promotion Association CAS (2019189);the Liaoning Revitalization Talents Program (XLYC2002076);the Dalian High-level Talents Program (2019RD09);the K.C. Wong Education Foundation (GJTD2018-06)。

摘　　要：One of the major obstacles to the application of potassium-ion batteries in large-scale energy storage is the lack of safe and effective electrolytes.KNH_(2),a new potassium-ion solid electrolyte has been developed in this study.Its ionic conductivity reaches 4.84×10^(-5)S cm^(-1)at 150°C and can reach3.56×10^(-4)S cm^(-1)after mechanochemical treatment.The result from electron paramagnetic resonance(EPR) measurement shows that the increment of ionic conductivity is dependent on the concentration of nitrogen defects in the KNH_(2) electrolyte.To the best of our knowledge,this is the first report that adopts inorganic amide as an electrolyte for potassium-ion battery and initiates the search for a new amidebased solid electrolyte for an all-solid-state potassium-ion battery.

关 键 词：Solid-state conductor Potassium ionic conductivity Nitrogen defect Potassium amide 

分 类 号：TM912[电气工程—电力电子与电力传动] O646.1[理学—物理化学]