The hybrid composite electrode comprising CuO and Cu2O micronanoparticles in a highly graphitized porous C matrix (CuO/Cu2O-GPC) has a rational design and is a favorable approach to increasing the rate capability and reversible capacity of metal oxide negative materials for Li- and Na-ion batteries. CuO/Cu2O-GPC is synthesized through a Cu-based metal-organic framework via a one-step thermal transformation process. The electrochemical performances of the CuO/Cu2O-GPC negative electrode in Li- and Na-ion batteries are systematically studied and exhibit excellent capacities of 887.3 mAh g-1 at 60 mA g-1 after 200 cycles in a Li-ion battery and 302.9 mAh g-1 at 50 mA g-1 after 200 cycles in a Na-ion battery. The high electrochemical stability was obtained via the rational strategy, mainly owing to the synergy effect of the CuO and Cu2O micronanoparticles and highly graphitized porous C formed by catalytic graphitization of Cu nanoparticles. Owing to the simple one-step thermal transformation process and resulting high electrochemical performance, CuO/Cu2O-GPC is one of the prospective negative active materials for rechargeable Li- and Na-ion batteries.
Bibliographical noteFunding Information:
This work was supported by the National Research Foundation under the Ministry of Science, ICT and Future, Korea (Grant NRF-2012M1A2A2671792), and a KIST institutional program (2E26291).
© 2016 American Chemical Society.
- Li-ion secondary battery
- Na-ion secondary battery
- copper oxide
- graphitized porous C
- metal-organic framework
- one-step catalytic graphitization process
ASJC Scopus subject areas
- Materials Science(all)