Ma, S., Hou, X., Huang, Y., Li, C., Hu, S. and Lam, K.-h. (2016) Polymer microsphere-assisted synthesis of lithium-rich cathode with improved electrochemical performance. Ceramics International, 42(4), pp. 4899-4910. (doi: 10.1016/j.ceramint.2015.11.173)
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Abstract
The Li-rich layered cathode material Li1.165Mn0.501Ni0.167Co0.167O2 with porous structure has been successfully synthesized through a facile co-precipitation approach followed with a high-temperature calcination treatment, adopting polymer microsphere (PSA) as a template and conductive agent. The PSA-assisted Li1.165Mn0.501Ni0.167Co0.167O2 composite exhibits remarkably improved cycling stability and rate capability compared with the bare composite. It delivers a high initial discharge capacity of 267.0 mA h g−1 at 0.1 C (1 C=250 mA g−1) between 2.0 V and 4.65 V. A discharge capacity of 214.9 mA h g −1 is still obtained after 100 cycles. Furthermore, the diffusion coefficients of Li+ investigated by the cyclic voltammetry technique are approximately 10−15–10−14 cm2 s−1. Such outstanding performance is mainly ascribed to: on one hand, the carbon residue of PSA after being calcined at high temperature contributes to enhance the electronic conductivity of the electrode and alleviates the volume changes during the Li+-insertion/extraction, leading to an improved rate capability; on the other hand, the unique porous structure and small particle size are conductive to increase the exposed electrochemical active surface, shorten Li+ diffusion distance and thus enhance the lithium storage capacity.
| Item Type: | Articles |
|---|---|
| Status: | Published |
| Refereed: | Yes |
| Glasgow Author(s) Enlighten ID: | Lam, Dr Koko |
| Authors: | Ma, S., Hou, X., Huang, Y., Li, C., Hu, S., and Lam, K.-h. |
| College/School: | College of Science and Engineering > School of Engineering > Systems Power and Energy |
| Journal Name: | Ceramics International |
| Publisher: | Elsevier |
| ISSN: | 0272-8842 |
| ISSN (Online): | 1873-3956 |
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