Layered Li{sub 1+x}(Ni{sub 0.33}Co{sub 0.33}Mn{sub 0.33})O{sub 2} cathode material prepared by microwave assisted solvothermal method for lithium ion batteries
- Department of Physics, Karunya University, Coimbatore 641 114, Tamilnadu (India)
- Department of Materials Science and Engineering, National University of Singapore, Singapore 117 546 (Singapore)
- Department of Physics, National University of Singapore, Singapore 117 542 (Singapore)
Highlights: • Microwave assisted solvothermal method. • Effect of (0.05–0.2) mol% of excess lithium in layered Li{sub 1+x}(Ni{sub 0.33}Co{sub 0.33}Mn{sub 0.33})O{sub 2}. • Different calcination temperature. • Voltage-cut off optimization. • Conductivity and electrochemical performance correlation. - Abstract: Layered hexagonal structure Li{sub 1+x}(Ni{sub 0.33}Co{sub 0.33}Mn{sub 0.33})O{sub 2} (LNCM) (x = 0, 0.05, 0.1, 0.15 and 0.2 mol%) compounds were prepared by microwave assisted solvothermal method at two different calcination temperature of 850 and 950 °C. The phase purity of the LNCM compounds was confirmed by Rietveld refined XRD pattern, Raman, and HRTEM studies. The average particle sizes were in the submicron range as confirmed by SEM and TEM analysis. Galvanostatic cycling studies were made in various voltage range, 2.5 to 4.4/4.6/4.8 V at a current rate of 0.2 C. Among all the compounds, LNCM prepared at 950 °C (HS3) exhibited an initial discharge capacity of 197 mAh/g and maintained a capacity of 180 mAh/g at the end of 40{sup th} cycle in 2.5–4.6 V window, indicating an excellent capacity retention. HS3 shows the electrical conductivity of 9.31 × 10{sup −6} S/cm, which was higher than all the other compounds and discussed the reason for the improved electrochemical performance.
- OSTI ID:
- 22730398
- Journal Information:
- Materials Research Bulletin, Vol. 93; Other Information: Copyright (c) 2017 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); ISSN 0025-5408
- Country of Publication:
- United States
- Language:
- English
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