TY - JOUR
T1 - Silver-Quantum-Dot-Modified MoO 3 and MnO 2 Paper-Like Freestanding Films for Flexible Solid-State Asymmetric Supercapacitors
AU - Zhang, Xingyan
AU - Fu, Qiangang
AU - Huang, Heming
AU - Wei, Lu
AU - Guo, Xin
N1 - Publisher Copyright:
© 2019 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
PY - 2019/3/27
Y1 - 2019/3/27
N2 - Free-standing paper-like thin-film electrodes have great potential to boost next-generation power sources with highly flexible, ultrathin, and lightweight requirements. In this work, silver-quantum-dot- (2–5 nm) modified transition metal oxide (including MoO 3 and MnO 2 ) paper-like electrodes are developed for energy storage applications. Benefitting from the ohmic contact at the interfaces between silver quantum dots and MoO 3 nanobelts (or MnO 2 nanowires) and the binder-free nature and 0D/1D/2D nanostructured 3D network of the fabricated electrodes, substantial improvements on the electrical conductivity, efficient ionic diffusion, and areal capacitances of the hybrid nanostructure electrodes are observed. With this proposed strategy, the constructed asymmetric supercapacitors, with Ag quantum dots/MoO 3 “paper” as anode, Ag quantum dots/MnO 2 “paper” as cathode, and neutral Na 2 SO 4 /polyvinyl alcohol hydrogel as electrolyte, exhibit significantly enhanced energy and power densities in comparison with those of the supercapacitors without modification of Ag quantum dots on electrodes; present excellent cycling stability at different current densities and good flexibility under various bending states; offer possibilities as high-performance power sources with low cost, high safety, and environmental friendly properties.
AB - Free-standing paper-like thin-film electrodes have great potential to boost next-generation power sources with highly flexible, ultrathin, and lightweight requirements. In this work, silver-quantum-dot- (2–5 nm) modified transition metal oxide (including MoO 3 and MnO 2 ) paper-like electrodes are developed for energy storage applications. Benefitting from the ohmic contact at the interfaces between silver quantum dots and MoO 3 nanobelts (or MnO 2 nanowires) and the binder-free nature and 0D/1D/2D nanostructured 3D network of the fabricated electrodes, substantial improvements on the electrical conductivity, efficient ionic diffusion, and areal capacitances of the hybrid nanostructure electrodes are observed. With this proposed strategy, the constructed asymmetric supercapacitors, with Ag quantum dots/MoO 3 “paper” as anode, Ag quantum dots/MnO 2 “paper” as cathode, and neutral Na 2 SO 4 /polyvinyl alcohol hydrogel as electrolyte, exhibit significantly enhanced energy and power densities in comparison with those of the supercapacitors without modification of Ag quantum dots on electrodes; present excellent cycling stability at different current densities and good flexibility under various bending states; offer possibilities as high-performance power sources with low cost, high safety, and environmental friendly properties.
KW - asymmetric supercapacitor
KW - flexibility
KW - manganese dioxide
KW - molybdenum trioxide
KW - silver quantum dots
UR - http://www.scopus.com/inward/record.url?scp=85062337991&partnerID=8YFLogxK
U2 - 10.1002/smll.201805235
DO - 10.1002/smll.201805235
M3 - 文章
C2 - 30821918
AN - SCOPUS:85062337991
SN - 1613-6810
VL - 15
JO - Small
JF - Small
IS - 13
M1 - 1805235
ER -