Journal
MATERIALS LETTERS
Volume 118, Issue -, Pages 8-11Publisher
ELSEVIER
DOI: 10.1016/j.matlet.2013.11.071
Keywords
Lithium ion batteries; Cathode material; Li1.2Ni0.13Co0.13Mn0.54O2; Carbon nanotubes; Composite materials
Funding
- National Natural Science Foundation of China [20871101]
- China Postdoctoral Science Foundation [2013M531864]
- Natural Science Foundation of Guangdong province [S2012020010937]
- Foundation for Distinguished Young Talents in Higher Education of Guangdong province [2012LYM_0048]
- University-Industry Cooperation Projects of Guangdong province [2011A091000014]
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The layered Li1.2Ni0.13Co0.13Mn0.54O2 cathode material has been synthesized and wired with CNT networks by spray drying technology. Homogeneous CNT networks were wired intimately on the surface of the pristine material. After CNT networks wiring, the electrode discharged superior initial capacity of 250.5 mAh g(-1) at 0.2C between 2.5 and 4.65 V with initial coulombic efficiency improved to 81.7% from 74.3% (the pristine), and moreover, it shows higher rate capability with the capacity of 183.5 mAh g(-1) at 5C. The improved electrochemical performances of the CNT networks-wired sample were mainly attributed to the enhanced electronic conductivity and kinetics of both the lithium-ion diffusion through surface layer and the charge transfer reaction. (C) 2013 Elsevier B.V. All rights reserved.
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