Journal
ELECTROCHEMISTRY COMMUNICATIONS
Volume 27, Issue -, Pages 92-95Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.elecom.2012.11.004
Keywords
LiMn1.5Ni0.5O4 spheres; Cathode; Self-supporting template synthesis; High capacity retention
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Funding
- Fundamental Research Funds for the Central Universities [SCUT2012ZZ0042]
- China Postdoctoral Science Foundation [2011M501090]
- National Natural Science Foundation of China [21176045]
- Guangdong Province Science and Technology Bureau [20108091000004, 2011B05030008]
- Fok Ying Tung Foundation [NRC07/08.EG01]
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Spinel LiMn1.5Ni0.5O4 (LMNO) sub-micrometer-sized spheres were prepared in one step using porous MnCO3 microspheres as a self-supporting template. The LMNO spheres were characterized by XRD, SEM and TEM. The obtained LMNO was in a well-crystallized cubic phase with little impurity. It showed high rate capability and excellent cycling stability as a cathode material for lithium ion batteries. Initial discharge capacities of 122.0, 120.3, 119.5 and 112.1 mAh g(-1) were found at 2, 3,5 and 10C respectively with 1C being 146.7 mA g(-1). Their capacity retentions are 92, 91, 82 and 79% respectively after 500 cycles. The as-prepared LMNO is a promising cathode material for high power and long-life lithium ion batteries. (C) 2012 Elsevier B.V. All rights reserved.
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