Deng, Y., Mou, J., Wu, H., Jiang, N., Zheng, Q., Lam, K. H. , Xu, C. and Lin, D. (2017) A superior Li2SiO3-composited LiNi0.5Mn1.5O4 cathode for high-voltage and high-performance lithium-ion batteries. Electrochimica Acta, 235, pp. 19-31. (doi: 10.1016/j.electacta.2017.03.066) (PMID:33807763) (PMCID:PMC7961538)
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Abstract
In this work, Li2SiO3, a layer-structured fast Li+-ion conductor with three-dimensional Li+ paths, has been firstly introduced into LiNi0.5Mn1.5O4 to form novel cathode composites of (1-x)LiNi0.5Mn1.5O4·xLi2SiO3 via a citric acid-assisted sol-gel method. The effects of Li2SiO3 on the phase structure, morphology and electrochemical performance of the materials were investigated. As x increases, the structure and electrochemical properties of the materials are tailored. The cathode material with x = 0.10 delivers ultrahigh initial discharge capacity ∼150.3 mAh g−1, which is 24.4% larger than that of the pristine LiNi0.5Mn1.5O4 (120.8 mAh g−1). The Li2SiO3-composited LiNi0.5Mn1.5O4 materials present an enhanced cycling stability, better rate performance and lower charge transfer resistance. These excellent electrochemical properties indicate that the compositing of fast Li+-ion conductor Li2SiO3 is an effective method to enhance the electrochemical performance of LiNi0.5Mn1.5O4-based cathode materials.
| Item Type: | Articles |
|---|---|
| Status: | Published |
| Refereed: | Yes |
| Glasgow Author(s) Enlighten ID: | Lam, Dr Koko |
| Authors: | Deng, Y., Mou, J., Wu, H., Jiang, N., Zheng, Q., Lam, K. H., Xu, C., and Lin, D. |
| College/School: | College of Science and Engineering > School of Engineering > Systems Power and Energy |
| Journal Name: | Electrochimica Acta |
| Publisher: | Elsevier for International Society of Electrochemistry |
| ISSN: | 0013-4686 |
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