TY - JOUR
AU - Chen, Chengmeng
AB - Using graphene oxide and a cobalt salt as precursor, a three‐dimensional graphene aerogel with embedded Co3O4 nanoparticles (3D Co3O4–RGO aerogel) is prepared by means of a solvothermal approach and subsequent freeze‐drying and thermal reduction. The obtained 3D Co3O4–RGO aerogel has a high specific capacitance of 660 F g−1 at 0.5 A g−1 and a high rate capability of 65.1 % retention at 50 A g−1 in a three‐electrode system. Furthermore, the material is used as cathode to fabricate an asymmetric supercapacitor utilizing a hierarchical porous carbon (HPC) as anode and 6 M KOH aqueous solution as electrolyte. In a voltage range of 0.0 to 1.5 V, the device exhibits a high energy density of 40.65 Wh kg−1 and a power density of 340 W kg−1 and shows a high cycling stability (92.92 % capacitance retention after 2000 cycles). After charging for only 30 s, three CR2032 coin‐type asymmetric supercapacitors in series can drive a light‐emitting‐diode (LED) bulb brightly for 30 min, which remains effective even after 1 h.
TI - Self‐Assembled 3D Graphene‐Based Aerogel with Co3O4 Nanoparticles as High‐Performance Asymmetric Supercapacitor Electrode
JF - ChemSusChem - Chemistry and Sustainability, Energy & Materials
DO - 10.1002/cssc.201500355
DA - 2015-07-07
UR - https://www.deepdyve.com/lp/wiley/self-assembled-3d-graphene-based-aerogel-with-co3o4-nanoparticles-as-Hw1cA6G4kC
SP - 2917
EP - 2926
VL - 8
IS - 17
DP - DeepDyve
ER -