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Synthesis of Single‐Crystalline Spinel LiMn 2 O 4 Nanorods for Lithium‐Ion Batteries with High Rate Capability and Long Cycle Life
Author(s) -
Xie Xiuqiang,
Su Dawei,
Sun Bing,
Zhang Jinqiang,
Wang Chengyin,
Wang Guoxiu
Publication year - 2014
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201404171
Subject(s) - nanorod , spinel , lithium (medication) , materials science , ion , chemical engineering , mineralogy , inorganic chemistry , nanotechnology , metallurgy , chemistry , engineering , medicine , endocrinology , organic chemistry
The long‐standing challenge associated with capacity fading of spinel LiMn 2 O 4 cathode material for lithium‐ion batteries is investigated. Single‐crystalline spinel LiMn 2 O 4 nanorods were successfully synthesized by a template‐engaged method. Porous Mn 3 O 4 nanorods were used as self‐sacrificial templates, into which LiOH was infiltrated by a vacuum‐assisted impregnation route. When used as cathode materials for lithium‐ion batteries, the spinel LiMn 2 O 4 nanorods exhibited superior long cycle life owing to the one‐dimensional nanorod structure, single‐crystallinity, and Li‐rich effect. LiMn 2 O 4 nanorods retained 95.6 % of the initial capacity after 1000 cycles at 3C rate. In particular, the nanorod morphology of the spinel LiMn 2 O 4 was well‐preserved after a long‐term cycling, suggesting the ultrahigh structural stability of the single crystalline spinel LiMn 2 O 4 nanorods. This result shows the promising applications of single‐crystalline spinel LiMn 2 O 4 nanorods as cathode materials for lithium‐ion batteries with high rate capability and long cycle life.