Electrochemical performance of LiMn0.5-xNi 0.5-xAl2xO2 by hydrothermal method
- Authors
- Woo, S.P.; Lee, S.H.; Lee, K.S.; Yoon, Y.S.
- Issue Date
- 2013
- Publisher
- John Wiley and Sons Inc.
- Keywords
- Homogeneous; Hydrothermal method
- Citation
- 8th Pacific Rim International Congress on Advanced Materials and Processing 2013, PRICM 8, v.1, pp.45 - 50
- Journal Title
- 8th Pacific Rim International Congress on Advanced Materials and Processing 2013, PRICM 8
- Volume
- 1
- Start Page
- 45
- End Page
- 50
- URI
- https://scholarworks.bwise.kr/gachon/handle/2020.sw.gachon/14866
- ISSN
- 0000-0000
- Abstract
- In lithium ion batteries, lithium cobalt oxide is extensively used as a cathode material. However, cobalt has high cost and toxicity, researchers have been investigating for the development of a cobalt free cathode material. LiMn0.5Ni0.5O2 is one of the most alternative materials due to its high capacity and energy density. Besides, Al is used to improve the stability. Al-substituted LiMn0.5Ni0.5O 2 exhibits high rate capability and cycle performance. The hydrothermal method of LiMn0.5-xNi0.5-xAl 2xO2 (x = 0.01, 0.02, 0.05, 0.1) results in enhancement of electrochemical performance and stability. The precursors were prepared by stirring in a mixture of de-ionized water and NH4OH for 2h. Afterwards, the mixtures were heated in a Teflon lined autoclave for 4h followed by calcination at 900 °C for 12h. The cyclic performance of LiMn 0.5-xNi0.5-xAl2xO2 was measured in the range of 2.0 to 4.5 V. It was observed that LiMn0.5-xNi 0.5-xAl2xO2 exhibited the highest capacity at x = 0.05.
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