Effect of increased surface area of LiMn0.475Ni0.475Al0.05O2 cathode material for Li-ion battery
- Authors
- Woo, Sung Pil; Lee, Seok Hee; Lee, Kang Soo; Yoon, Young Soo
- Issue Date
- 15-Aug-2014
- Publisher
- ELSEVIER
- Keywords
- LiMn0.475Ni0.475Al0.05O2; Hydrothermal method; Layered structure; Surface area
- Citation
- MATERIALS LETTERS, v.129, pp.80 - 83
- Journal Title
- MATERIALS LETTERS
- Volume
- 129
- Start Page
- 80
- End Page
- 83
- URI
- https://scholarworks.bwise.kr/gachon/handle/2020.sw.gachon/12383
- DOI
- 10.1016/j.matlet.2014.05.030
- ISSN
- 0167-577X
- Abstract
- In this study, cathode material for Li-ion secondary batteries is synthesized from LiMn0.475Ni0.475Al0.05O2 powders by a hydrothermal method. The precursor has a uniform size distribution with average particle size of approximately 70-100 nm. LiMn0.475Ni0.475Al0.05O2 synthesized using the hydrothermal method exhibits a discharge capacity of 137 mA h g(-1), and demonstrates good capacity retention and cyclability compared to materials synthesized by the more commonly used co-precipitation method. These improved electrochemical properties are due to the increased surface area associated with the smaller particle size and well dispersion, which permits easier mobility of Li+ ions and minimized surface energy of cathode material. Using TEM analysis, it was found that an increasing d-value also provides easier Li+ ion intercalation and deintercalation pathways. (C) 2014 Elsevier B.V. All rights reserved.
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