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Liquid K–Na Alloy Anode Enables Dendrite‐Free Potassium Batteries
Author(s) -
Xue Leigang,
Gao Hongcai,
Zhou Weidong,
Xin Sen,
Park Kyusung,
Li Yutao,
Goodenough John B.
Publication year - 2016
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201602633
Subject(s) - anode , electrolyte , battery (electricity) , materials science , cathode , potassium , alloy , battery capacity , interface (matter) , dendrite (mathematics) , chemical engineering , metallurgy , composite material , chemistry , thermodynamics , physics , power (physics) , geometry , mathematics , electrode , engineering , capillary number , capillary action
A K–Na liquid alloy allows a dendrite‐free high‐capacity anode ; its immiscibility with an organic liquid electrolyte offers a liquid–liquid anode–electrolyte interface. Working with a sodiated Na 2 MnFe(CN) 6 cathode, the working cation becomes K + to give a potassium battery of long cycle life with an acceptable capacity at high charge/discharge rates.