The effect of cobalt doping on the morphology and electrochemical performance of high-voltage spinel LiNi0.5Mn1.5O4 cathode material
- Zhengzhou Univ. (China). School of Materials Science and Engineering. International Joint Research Lab. for Low-Carbon & Environmental Materials of Henan Province; Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Energy Storage and Distributed Resource Division. Energy Technologies Area
- Zhengzhou Univ. (China). School of Materials Science and Engineering. International Joint Research Lab. for Low-Carbon & Environmental Materials of Henan Province
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Energy Storage and Distributed Resource Division. Energy Technologies Area
- Northeastern Univ., Shenyang (China). School of Materials and Metallurgy; Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Energy Storage and Distributed Resource Division. Energy Technologies Area
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.
- Research Organization:
- Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
- Sponsoring Organization:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE), Vehicle Technologies Office (EE-3V); National Natural Science Foundation of China (NSFC); Fundamental Research Funds for the Central Universities of China; USDOE Office of Energy Efficiency and Renewable Energy (EERE), Office of Sustainable Transportation. Vehicle Technologies Office (VTO)
- Grant/Contract Number:
- AC02-05CH11231; 51204038; U1504521; N110802002; L1502004
- OSTI ID:
- 1433095
- Alternate ID(s):
- OSTI ID: 1326447
- Journal Information:
- Solid State Ionics, Vol. 292; ISSN 0167-2738
- Publisher:
- ElsevierCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Understanding structural, optical, magnetic and electrical performances of Fe- or Co-substituted spinel LiMn1.5Ni0.5O4 cathode materials
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journal | January 2019 |
Effects of LiBF4 concentration in carbonate-based electrolyte on the stability of high-voltage LiNi0.5Mn1.5O4 cathode
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journal | March 2019 |
P2-type Na 2/3 Ni 1/3 Mn 2/3 O 2 Cathode Material with Excellent Rate and Cycling Performance for Sodium-Ion Batteries
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journal | January 2019 |
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