Journal
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
Volume -, Issue 16, Pages 2887-2892Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/ejic.201300005
Keywords
Batteries; Block copolymers; Cathode materials; Layered compounds; Lithium; Nanoparticles
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Funding
- National Basic Research Program of China [2009CB220100]
- National High Technology Development Program of China (863) [2012AA110102]
- Independent Research Project of State Grid Corporation of China
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Nanocrystalline Li[Li0.2Mn0.54Ni0.13Co0.13]O2 was prepared by a layered-template method and was tested as a high-capacity and high-power cathode for Li-ion batteries. Structural characterization demonstrates that the Li[Li0.2Mn0.54Ni0.13Co0.13]O2 nanoparticles have a high crystallinity with a monoclinic (C/2m) structure. This material exhibits an initial discharge capacity of 277.4 mAhg1 and a high coulombic efficiency of 87.3%, with a very small capacity fade of 0.046% per cycle over 100 cycles. Such excellent electrochemical performance is likely to result from its monoclinic structure that enables a stable solid solution structure and reversible structural changes during cycling. Therefore, monoclinic Li[Li0.2Mn0.54Ni0.13Co0.13]O2 may meet the high-capacity and high-rate requirements for an alternative cathode for a new generation of Li-ion batteries.
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