Graphene Quantum Dots Coated VO 2 Arrays for Highly Durable Electrodes for Li and Na Ion Batteries
Nanyang Technological University · China Jiliang University
Abstract
Nanoscale surface engineering is playing important role in enhancing the performance of battery electrode. VO2 is one of high-capacity but less-stable materials and has been used mostly in the form of powders for Li-ion battery cathode with mediocre performance. In this work, we design a new type of binder-free cathode by bottom-up growth of biface VO2 arrays directly on a graphene network for both high-performance Li-ion and Na-ion battery cathodes. More importantly, graphene quantum dots (GQDs) are coated onto the VO2 surfaces as a highly efficient surface "sensitizer" and protection to further boost the electrochemical properties. The integrated electrodes deliver a Na storage capacity of 306 mAh/g at 100…
Citation impact
- FWCI
- 33.00
- Percentile
- 100%
- References
- 57
Authors
11Topics & keywords
- Graphene
- Materials science
- Battery (electricity)
- Electrode
- Cathode
- Electrochemistry
- Nanotechnology
- Quantum dot