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Polyaniline modified graphene and carbon nanotube composite electrode for asymmetric supercapacitors of high energy density
| Content Provider | Semantic Scholar |
|---|---|
| Author | Cheng, Qian Tang, Jie Shinya, Norio Qin, Lu Chang |
| Copyright Year | 2013 |
| Abstract | Abstract Graphene and single-walled carbon nanotube (CNT) composites are explored as the electrodes for supercapacitors by coating polyaniline (PANI) nano-cones onto the graphene/CNT composite to obtain graphene/CNT–PANI composite electrode. The graphene/CNT–PANI electrode is assembled with a graphene/CNT electrode into an asymmetric pseudocapacitor and a highest energy density of 188 Wh kg−1 and maximum power density of 200 kW kg−1 are achieved. The structure and morphology of the graphene/CNT composite and the PANI nano-cone coatings are characterized by both scanning electron microscopy and transmission electron microscopy. The excellent performance of the assembled supercapacitors is also discussed and it is attributed to (i) effective utilization of the large surface area of the three-dimensional network structure of graphene-based composite, (ii) the presence of CNT in the composite preventing graphene from re-stacking, and (ii) uniform and vertically aligned PANI coating on graphene offering increased electrical conductivity. |
| Starting Page | 423 |
| Ending Page | 428 |
| Page Count | 6 |
| File Format | PDF HTM / HTML |
| DOI | 10.1016/j.jpowsour.2013.04.105 |
| Volume Number | 241 |
| Alternate Webpage(s) | https://research.physics.unc.edu/lcqin/www1/papers/2013-Cheng-JPS.pdf |
| Alternate Webpage(s) | https://doi.org/10.1016/j.jpowsour.2013.04.105 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
