Synthesis of Pseudocapacitive Polymer Chain Anode and Subnanoscale Metal Oxide Cathode for Aqueous Hybrid Capacitors Enabling High Energy and Power Densities along with Long Cycle Life

Cited 5 time in webofscience Cited 0 time in scopus
  • Hit : 163
  • Download : 0
Aqueous electrochemical energy storages are of enormous attention due to their high safety and being environmentally friendly, but they must satisfy very challenging standards in energy and power densities over long repeated charging/discharging cycles. Herein, a strategy to realize high-performance aqueous hybrid capacitors (AHCs) using pseudocapacitive negative and positive electrodes is reported. Polymer chains, which are synthesized by in situ polymerization of polyaniline on reduced graphene sheets, show fiber-like morphologies and the redox-reactive surface area allowing high capacitance as anode materials even at a high current density of 20 A g(-1) and a high loading of approximate to 6 mg cm(-2). Additionally, subnanoscale metal oxide particles on graphene are utilized as pseudocapacitive cathode materials and they show the approximately threefold higher capacitance than nanocrystals of approximate to 10 nm. Assembling these polymer chain anode and subnanoscale metal oxide cathode in full-cell AHCs is shown to give the high energy density exceeding those of aqueous batteries along with the approximate to 100% capacity retention over 100 000 redox cycles. Additionally, AHCs exhibit the high power density allowing ultrafast charging, so that the switching wearable display kit with two AHCs in series can be charged within several seconds by the flexible photovoltaic module and USB switching charger.
Publisher
WILEY-V C H VERLAG GMBH
Issue Date
2018-04
Language
English
Article Type
Article
Citation

ADVANCED ENERGY MATERIALS, v.8, no.10, pp.1702895-1 - 1702895-7

ISSN
1614-6832
DOI
10.1002/aenm.201702895
URI
http://hdl.handle.net/10203/241511
Appears in Collection
EEW-Journal Papers(저널논문)
Files in This Item
There are no files associated with this item.
This item is cited by other documents in WoS
⊙ Detail Information in WoSⓡ Click to see webofscience_button
⊙ Cited 5 items in WoS Click to see citing articles in records_button

qr_code

  • mendeley

    citeulike


rss_1.0 rss_2.0 atom_1.0