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A Honeycomb‐Layered Oxide Cathode for Sodium‐Ion Batteries with Suppressed P3–O1 Phase Transition
Author(s) -
You Ya,
Kim Sang Ok,
Manthiram Arumugam
Publication year - 2017
Publication title -
advanced energy materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.08
H-Index - 220
eISSN - 1614-6840
pISSN - 1614-6832
DOI - 10.1002/aenm.201601698
Subject(s) - materials science , cathode , faraday efficiency , oxide , intercalation (chemistry) , transition metal , chemical engineering , ion , phase transition , honeycomb , sodium oxide , inorganic chemistry , anode , electrode , composite material , chemistry , thermodynamics , metallurgy , catalysis , organic chemistry , physics , engineering
Mg‐substituted Na 3 Ni 2− x Mg x SbO 6 cathode materials are synthesized via a scalable high‐temperature solid‐state method to improve the cyclability of the honeycomb‐layered oxide cathode in sodium‐ion batteries. The partial substitution of Ni 2+ by Mg 2+ in the transition‐metal layer suppresses the electrochemically unfavorable P3–O1 transition and enlarges the lattice parameters to bring improved performance with respect to capacity retention, Coulombic efficiency, and Na (de)intercalation kinetics.