TY - JOUR
T1 - Low-cost and eco-friendly synthesis of octahedral LiMn2O4 cathode material with excellent electrochemical performance
AU - Zhao, Hongyuan
AU - Nie, Yongfang
AU - Li, Yongfeng
AU - Wu, Tingting
AU - Zhao, Erqing
AU - Song, Jiangxuan
AU - Komarneni, Sridhar
N1 - Funding Information:
This work was financially supported by the Key Research Project of Education Department of Henan Province (No. 19A150023 , No. 19A430014 ), Research Project of Science and Technology of Henan Province (No. 192102210301 , No. 192102210215 ), Young Key Teachers Projects in Henan Higher Education Institutions (No. 2018GGJS113 ), National Natural Science Foundation of China (No. 51602250 , No. 51502318 ).
PY - 2019/10/1
Y1 - 2019/10/1
N2 - Here, high-performance LiMn2O4 particles of octahedral morphology with exposed (111) planes were synthesized via an easy, inexpensive and eco-friendly process using octahedral-shaped Mn3O4 as precursor, which was fabricated by reacting potassium permanganate (KMnO4) with a tiny amount of ethylene glycol (C2H6O2) using the hydrothermal method. Without cation doping and surface modification, the octahedral LiMn2O4 particles showed very good cycling life and outstanding high-temperature performance. When cycled at 1.0 C, it exhibited a desirable capacity of 123.6 mAh g−1 (Retention after 200 cycles: 93.7%). At high rate of 10 C, this material delivered 85.7 and 85.3 mAh g−1 discharge capacities with excellent retentions of 94.7% and 90.5% after 200 cycles at 25 and 55 °C, respectively. Such impressive performance was obtained largely from the unique octahedral morphology with exposed (111) planes, high crystallinity and uniform particle size distribution, which effectively mitigated the dissolution of manganese, maintained the structural stability and accelerated the diffusion of lithium ions.
AB - Here, high-performance LiMn2O4 particles of octahedral morphology with exposed (111) planes were synthesized via an easy, inexpensive and eco-friendly process using octahedral-shaped Mn3O4 as precursor, which was fabricated by reacting potassium permanganate (KMnO4) with a tiny amount of ethylene glycol (C2H6O2) using the hydrothermal method. Without cation doping and surface modification, the octahedral LiMn2O4 particles showed very good cycling life and outstanding high-temperature performance. When cycled at 1.0 C, it exhibited a desirable capacity of 123.6 mAh g−1 (Retention after 200 cycles: 93.7%). At high rate of 10 C, this material delivered 85.7 and 85.3 mAh g−1 discharge capacities with excellent retentions of 94.7% and 90.5% after 200 cycles at 25 and 55 °C, respectively. Such impressive performance was obtained largely from the unique octahedral morphology with exposed (111) planes, high crystallinity and uniform particle size distribution, which effectively mitigated the dissolution of manganese, maintained the structural stability and accelerated the diffusion of lithium ions.
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U2 - 10.1016/j.ceramint.2019.05.273
DO - 10.1016/j.ceramint.2019.05.273
M3 - Article
AN - SCOPUS:85066288823
SN - 0272-8842
VL - 45
SP - 17183
EP - 17191
JO - Ceramics International
JF - Ceramics International
IS - 14
ER -