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- Title
Coaxial MWNTs@MnCo2O4 wrapped in conducting graphene for enhanced lithium ion storage.
- Authors
Chen, Lan; Huang, Yongcong; Chen, Yulu; Zheng, Liqing; Zhao, Yi; Chen, Yan; Zhao, Guiying; Li, Jiaxin; Lin, Yingbin; Huang, Zhigao
- Abstract
In this report, nanocomposites of MWNTs@MnCo2O4@Gs are synthesized via a wet-chemical approach, in which double layer of MnCo2O4 particles evenly attached on MWNTs and wrapped in graphene. As an anode material for lithium batteries (LIBs), the designed MWNTs@MnCo2O4@Gs delivers LIB performance with superior rate capability and a large reversible capacity of 1094 mAh g−1 after 300 cycles tested at 200 mA g−1, respectively. The MWNTs@MnCo2O4@Gs electrodes deliver reversible capacities of 752 and 520 mAh g−1 after 80 cycles at high current densities of 1.0 and 3.0 A g−1, being much larger than those values of 155 and 125 mAh g−1 without Gs wrapping. The results revealed that the reserved space structure combined with conductive carbon supporting of MWNTs and Gs can effectively provide buffer for the volume expansion of Li+ insertion/extraction process, promote the ion/electron transport, and finally improve their LIB performance. Thus, such structure design supplied a promising route to obtain binary metal oxide-based anode in order to achieve high-performance LIBs.
- Subjects
GRAPHENE; ELECTRON transport; LITHIUM cells; POTASSIUM ions; DENSITY currents; ANODES; LITHIUM ions
- Publication
Journal of Materials Science, 2021, Vol 56, Issue 15, p9356
- ISSN
0022-2461
- Publication type
Article
- DOI
10.1007/s10853-021-05867-5