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The effect of cobalt doping on the morphology and electrochemical performance of high-voltage spinel LiNi<sub>0.5</sub>Mn<sub>1.5</sub>O<sub>4</sub> cathode material [electronic resource].

Published
Washington, D.C. : United States. Office of the Assistant Secretary of Energy Efficiency and Renewable Energy, 2016.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy
Physical Description
pages 70-74 : digital, PDF file
Additional Creators
Lawrence Berkeley National Laboratory, United States. Office of the Assistant Secretary of Energy Efficiency and Renewable Energy, National Natural Science Foundation of China (NSFC), and United States. Department of Energy. Office of Scientific and Technical Information
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Summary
In this paper, to reveal the effects of Co-doping on the electrochemical performance of micro-sized LiNi0.5Mn1.5O4 (LNMO), undoped LNMO and Co-doped LiCo0.1Ni0.45Mn1.45O4 (LCoNMO) are synthesized via a PVP-combustion method and calcined at 1000 °C for 6 h. SEM and XRD analyses suggest that Co-doping decreases the particle size and the LizNi1-zO2 impurity at the calcination temperature of 1000 °C. LCoNMO has much better rate capability while its specific capacity at C/5 is 10% lower than that of LNMO. At 15 C rate, their specific capacities are closed, and the LCoNMO delivers 86.2% capacity relative to C/5, and this value for LNMO is only 77.0%. The DLi + values determined by potential intermittent titration technique (PITT) test of LCoNMO are 1–2 times higher than that of LNMO in most SOC region. The LCoNMO shows very excellent cycling performance, which is the best value compared with literatures. After 1000 cycles, the LCoNMO still delivers 94.1% capacity. Finally, moreover, its coulombic efficiency and energy efficiency keep at 99.84% and over 97.3% during 1 C cycling, respectively.
Report Numbers
E 1.99:1433095
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Note
Published through SciTech Connect.
06/03/2016.
"ark:/13030/qt29s0p8v0"
Solid State Ionics 292 ISSN 0167-2738 AM
Jing Mao; Mengze Ma; Panpan Liu; Junhua Hu; Guosheng Shao; Vince Battaglia; Kehua Dai; Gao Liu.
Fundamental Research Funds for the Central Universities of China
Funding Information
AC02-05CH11231
51204038
U1504521
N110802002
L1502004
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