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Ethylene Glycol‐Assisted Sol‐Gel Method for Preparing LiNi 1/3 Co 1/3 Mn 1/3 O 2 as Cathode Material for Lithium‐Ion Batteries with Excellent Electrochemical Performance
Author(s) -
Zhu Limin,
Yang Guang,
Liu Jianping,
Bao Chenguang,
Xie Lingling,
Cao Xiaoyu
Publication year - 2019
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201903231
Subject(s) - lithium (medication) , ethylene glycol , diffusion , materials science , cathode , ion , chemical engineering , particle size , cationic polymerization , particle (ecology) , analytical chemistry (journal) , chemistry , chromatography , polymer chemistry , organic chemistry , thermodynamics , medicine , physics , oceanography , geology , engineering , endocrinology
Ethylene glycol‐assisted sol‐gel method is employed for preparing LiNi 1/3 Co 1/3 Mn 1/3 O 2 used as cathode material in lithium‐ion batteries. The prepared material has higher c / a value and lower cationic mixing degree of Li + /Ni 2+ , illuminating a more orderly structure, smaller particle size and more regular particle shape, which shorten the diffusion length for Li + ions and allow the rapid kinetics of Li + ions diffusion. Sure enough, the as‐prepared LiNi 1/3 Co 1/3 Mn 1/3 O 2 material displays the first discharge capacity of 208 mAh g −1 and keeps 133 mAh g −1 after 200 cycles between 2.5 and 4.5 V at 0.2 C. In addition, it demonstrates excellent rate capacity of 143 mAh g −1 at 2 C. The results show that LiNi 1/3 Co 1/3 Mn 1/3 O 2 prepared by this method has high discharge capacity, admirable rate capability and exceptional cycle stability, which provides significant insights into the synthesis of other layered oxides as cathode materials for lithium‐ion batteries.