Abstract
To improve the electrochemical performance of Co3O4/graphene composites towards high-performance lithium ion batteries, various facile chemical methods have been developed to form hybrid Co3O4/graphene composites, but the compositions of these composites were considerably different. In this study, a two-step solvothermal synthesis method was employed to accurately control the concentration of Co3O4 nanoparticles (NPs) with particle sizes less than 10 nm in the composite. The Co3O4/reduced graphene oxide (RGO) composites exhibited the highest reversible capacity of 1600 mAh g−1 at 43 wt% Co3O4 NPs. The synergic effects of the sub-10-nm sized Co3O4 and the RGO sheets resulted in improved reversible capacity, cycling stability, and rate capability, which are caused by a large number of active sites and the short diffusion pathways provided by the nano-sized Co3O4, as well as the elastic buffer space and conductive pathway provided by the RGO sheets.
Original language | English |
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Pages (from-to) | 15-21 |
Number of pages | 7 |
Journal | Chemical Engineering Journal |
Volume | 309 |
DOIs | |
Publication status | Published - 2017 Feb 1 |
Bibliographical note
Funding Information:This work was supported by Korea Electric Power Corporation through Korea Electrical Engineering & Science Research Institute, Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT & Future Planning (2013R1A1A1011215), the 2nd phase of the Fundamental R&D Programs for Core Technology of Materials funded by Ministry of Trade, Industry and Energy (2015-2016), Plant Research Program funded by Ministry of Land, Infrastructure and Transport and the Korea Research Institute of Chemical Technology(KRICT).
Publisher Copyright:
© 2016 Elsevier B.V.
All Science Journal Classification (ASJC) codes
- Chemistry(all)
- Environmental Chemistry
- Chemical Engineering(all)
- Industrial and Manufacturing Engineering