Supercapacitors based on flexible graphene/polyaniline nanofiber composite films.
Composite films of chemically converted graphene (CCG) and polyaniline nanofibers (PANI-NFs) were prepared by vacuum filtration the mixed dispersions of both components. The composite film has a layered structure, and PANI-NFs are sandwiched between CCG layers. Furthermore, it is mechanically stable and has a high flexibility; thus, it can be bent into large angles or be shaped into various desired structures. The conductivity of the composite film containing 44% CCG (5.5 x 10(2) S m(-1)) is about 10 times that of a PANI-NF film. Supercapacitor devices based on this conductive flexible composite film showed large electrochemical capacitance (210 F g(-1)) at a discharge rate of 0.3 A g(-1). They also exhibited greatly improved electrochemical stability and rate performances.
Wu
Qiong
Q
Department of Chemistry and Laboratory of Bio-organic Phosphorus, Tsinghua University, Beijing 100084, People's Republic of China.
Xu
Yuxi
Y
Yao
Zhiyi
Z
Liu
Anran
A
Shi
Gaoquan
G
D000814:Aniline Compounds / Q000737:chemistry*; D002244:Carbon / Q000737:chemistry*; D025802:Electric Capacitance; D004563:Electrochemistry; D055595:Mechanical Phenomena; D008855:Microscopy, Electron, Scanning; D053761:Nanocomposites / Q000737:chemistry*; D057139:Nanofibers / Q000737:chemistry*; D014867:Water / Q000737:chemistry
D000814:Aniline Compounds; C416807:polyaniline; D014867:Water; D002244:Carbon