Electrochemical Characteristics of LiMn2O4 Cathodes Synthesized from Various Precursors of Manganese Oxide and Manganese Hydroxide

Title
Electrochemical Characteristics of LiMn2O4 Cathodes Synthesized from Various Precursors of Manganese Oxide and Manganese Hydroxide
Authors
이종문김주성홍순기이정진안한철조원일모선일
Keywords
Li-ion battery; cathode; nano-crystal; precursors
Issue Date
2012-08
Publisher
한국전기화학회지; Journal of the Korean Electrochemical Society
Citation
VOL 15, NO 3, 172-180
Abstract
The cathodes for lithium ion battery were synthesized from various precursors of manganese oxides and manganese hydroxides. As the first step, nanosized precursors such as (nano-sticks), (nano-rods), (nano-octahedra), amorphous (nano-spheres), and (nano-plates) were prepared by a hydrothermal or a precipitation method. Spinel with various sizes and shapes were finally synthesized by a solid-state reaction method from the manganese precursors and LiOH. Nano-sized (500 nm) octahedron showed high capacities of 107 mAh and 99 mAh at 1 C- and 50 C-rate, respectively. Three dimensional octahedral crystallites exhibit superior electrochemical characteristics to the other one-dimensional and two-dimensional shaped nanoparticles. After 500 consecutive charge discharge battery cycles at 10 C-rate with the nano-octahedron cathode, the capacity retention of 95% was observed, which is far better than any other morphologies studied in this work.
URI
http://pubs.kist.re.kr/handle/201004/44217
ISSN
12291935
Appears in Collections:
KIST Publication > Article
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