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Lithium‐Ion Transport through a Tailored Disordered Phase on the LiNi 0.5 Mn 1.5 O 4 Surface for High‐Power Cathode Materials
Author(s) -
Jo Mi Ru,
Kim YongIl,
Kim Yunok,
Chae Ji Su,
Roh Kwang Chul,
Yoon WonSub,
Kang YongMook
Publication year - 2014
Publication title -
chemsuschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.412
H-Index - 157
eISSN - 1864-564X
pISSN - 1864-5631
DOI - 10.1002/cssc.201402109
Subject(s) - spinel , electrochemistry , lithium (medication) , cathode , materials science , phase (matter) , diffusion , ion , chemical engineering , analytical chemistry (journal) , electrode , chemistry , thermodynamics , metallurgy , physics , medicine , chromatography , engineering , endocrinology , organic chemistry
The phase control of spinel LiNi 0.5 Mn 1.5 O 4 was achieved through surface treatment that led to an enhancement of its electrochemical properties. Li + diffusion inside spinel LiNi 0.5 Mn 1.5 O 4 could be promoted by modifying the surface structure of LiNi 0.5 Mn 1.5 O 4 through phosphidation into a disordered phase ( Fd 3 m ) that allows facile Li + transport. Phosphidated LiNi 0.5 Mn 1.5 O 4 showed a significantly enhanced electrochemical performance, even at high rates exceeding 10 C, demonstrating that the improved kinetics (related to the amount of Mn 3+ ) can render LiNi 0.5 Mn 1.5 O 4 competitive as a high‐power cathode material for electric vehicles and hybrid electric vehicles.
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