Composite Electrode Material for Assembling Asymmetric Supercapacitor
Firstly, we optimized the reaction time, reaction temperature and formula to obtain cobalt oxide/graphene composite with stable structure, high electrical conductivity and high capacity. Then we adjusted the activation ways and conditions to prepare activated carbon/graphene composite with proper pore size distribution, high specific surface area and high electrical conductivity. Finally, these two electrode materials were assembled to an asymmetric supercapacitor, which achieved the 1.5V working voltage, 40wh/kg energy density and excellent cycle performances. Coin cell and soft package were further developed by the matching of anode and cathode, the choose of electrolyte types and the optimizing of the packaging technology. Demonstration of lighting LED was displayed.
Advantages
High loading amount was realized by uniformly dispersing the cobalt oxide on graphene sheet, and the capacity performance of the composite was enhanced. This technology obtained coin cell and soft package with high energy density by optimizing the structure, mass and voltage of both electrode materials in asymmetric supercapacitor.
Technical Index
Graphene/activated carbon composite as cathode
| Item | Index |
| Specific Surface Area（m2/g） | ≥2000 |
| Pore Size（nm） | 0.5~100 |
| Working Voltage（V） | -1~0 |
| Specific Capacity(three-electrode in aqueous solution, 1 A /g)（F/g） | ≥150 |
Co3O4/graphene composite as anode
| Item | Index |
| Specific Surface Area （m2/g） | ≥100 |
| Pore Size（nm） | 0.5~100 |
| Working Voltage（V） | 0~0.5 |
| Specific Capacity(three-electrode in aqueous solution, 1 A/g)（F/g） | ≥200 |
Power-mode symmetrical supercapacitor
| Item | Index |
| Working Voltage（V） | 0~1 |
| Charging Time（s） | 50 |
| Cycle Life（after cycling for 200,000 times） | ≥90% |
| Power Density（W/kg） | ≥10000 |
| Energy Density（Wh/kg） | ≥7 |
Asymmetric supercapacitor
| Item | Index |
| Working voltage（V） | 0~1.5 |
| Charging time（min） | 3 |
| Cycle life（after cycling for 3,000 times） | ≥90% |
| Power density（W/kg） | ≥3000 |
| Energy density（Wh/kg） | ≥15 |
Intellectual Properties
Four authorized patents（ZL201510232487.0, ZL201611071556.5, ZL201510062450.8, ZL201510062117.7）.
Market Prospects
According to the statistical data from DTechEX, the global market of supercapacitors was $ 1.1 billion in 2014. It is expected that the global market of supercapacitors will reach $ 3.5 billion in 2020. In future, supercapacitor will play important role in hybrid electric vehicles and new energy acquisition system.
Technology Maturity
Laboratory research and development.
Cooperation
Cooperative development.
Schematic of the structure of as-made asymmetric supercapacitor consisting of 3D Co3O4-RGO aerogel and hierarchically porous carbon electrodes
Cycling stability of as-made asymmetric supercapacitor consisting of 3D Co3O4-RGO aerogel and hierarchically porous carbon electrodes
Ragone plots of the symmetric supercapacitors of 3D Co3O4-RGO //3D Co3O4-RGO, HPC//HPC and the asymmetric supercapacitor of Co3O4-RGO//HPC. Inset shows a red LED powered by three asymmetric supercapacitors connected in series.
Composite Electrode Material for Assembling Asymmetric Supercapacitor
Firstly, we optimized the reaction time, reaction temperature and formula to obtain cobalt oxide/graphene composite with stable structure, high electrical conductivity and high capacity. Then we adjusted the activation ways and conditions to prepare activated carbon/graphene composite with proper pore size distribution, high specific surface area and high electrical conductivity. Finally, these two electrode materials were assembled to an asymmetric supercapacitor, which achieved the 1.5V working voltage, 40wh/kg energy density and excellent cycle performances. Coin cell and soft package were further developed by the matching of anode and cathode, the choose of electrolyte types and the optimizing of the packaging technology. Demonstration of lighting LED was displayed.
Advantages
High loading amount was realized by uniformly dispersing the cobalt oxide on graphene sheet, and the capacity performance of the composite was enhanced. This technology obtained coin cell and soft package with high energy density by optimizing the structure, mass and voltage of both electrode materials in asymmetric supercapacitor.
Technical Index
Graphene/activated carbon composite as cathode
| Item | Index |
| Specific Surface Area（m2/g） | ≥2000 |
| Pore Size（nm） | 0.5~100 |
| Working Voltage（V） | -1~0 |
| Specific Capacity(three-electrode in aqueous solution, 1 A /g)（F/g） | ≥150 |
Co3O4/graphene composite as anode
| Item | Index |
| Specific Surface Area （m2/g） | ≥100 |
| Pore Size（nm） | 0.5~100 |
| Working Voltage（V） | 0~0.5 |
| Specific Capacity(three-electrode in aqueous solution, 1 A/g)（F/g） | ≥200 |
Power-mode symmetrical supercapacitor
| Item | Index |
| Working Voltage（V） | 0~1 |
| Charging Time（s） | 50 |
| Cycle Life（after cycling for 200,000 times） | ≥90% |
| Power Density（W/kg） | ≥10000 |
| Energy Density（Wh/kg） | ≥7 |
Asymmetric supercapacitor
| Item | Index |
| Working voltage（V） | 0~1.5 |
| Charging time（min） | 3 |
| Cycle life（after cycling for 3,000 times） | ≥90% |
| Power density（W/kg） | ≥3000 |
| Energy density（Wh/kg） | ≥15 |
Intellectual Properties
Four authorized patents（ZL201510232487.0, ZL201611071556.5, ZL201510062450.8, ZL201510062117.7）.
Market Prospects
According to the statistical data from DTechEX, the global market of supercapacitors was $ 1.1 billion in 2014. It is expected that the global market of supercapacitors will reach $ 3.5 billion in 2020. In future, supercapacitor will play important role in hybrid electric vehicles and new energy acquisition system.
Technology Maturity
Laboratory research and development.
Cooperation
Cooperative development.
Schematic of the structure of as-made asymmetric supercapacitor consisting of 3D Co3O4-RGO aerogel and hierarchically porous carbon electrodes
Cycling stability of as-made asymmetric supercapacitor consisting of 3D Co3O4-RGO aerogel and hierarchically porous carbon electrodes
Ragone plots of the symmetric supercapacitors of 3D Co3O4-RGO //3D Co3O4-RGO, HPC//HPC and the asymmetric supercapacitor of Co3O4-RGO//HPC. Inset shows a red LED powered by three asymmetric supercapacitors connected in series.
CONTACT US
Sales Manager:
0086+18835170493（Miss. Liu）
WeChat：18835170493
Technical support:
0086+13934640625（Miss. Guo）
graphene@sxicc.ac.cn
WeChat:13934640625
Tel/Fax：0086+03514049061
Post Code：030001
Adress：27 South Taoyuan Road, Taiyuan, Shanxi, P.R.China
Website：http://709.sxicc.ac.cn
0351-4049061
