Flexible solid-state symmetric supercapacitors based on MnO2 nanofilms with high rate capability and long cyclability | Zendy

Lingxia Wu | Zendy; Ruizhi Li | Zendy; Junling Guo | Zendy; Cheng Zhou | Zendy; Wenpei Zhang | Zendy; Chong Wang | Zendy; Yu Huang | Zendy; Yuanyuan Li | Zendy; Jinping Liu | Zendy

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Flexible solid-state symmetric supercapacitors based on MnO2 nanofilms with high rate capability and long cyclability

Author(s) -

Lingxia Wu,

Ruizhi Li,

Junling Guo,

Cheng Zhou,

Wenpei Zhang,

Chong Wang,

Yu Huang,

Yuanyuan Li,

Jinping Liu

Publication year - 2013

Publication title -

aip advances

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.421

H-Index - 58

ISSN - 2158-3226

DOI - 10.1063/1.4820353

Subject(s) - supercapacitor , electrolyte , horizontal scan rate , separator (oil production) , materials science , solid state , voltage , electrode , chemical engineering , nanotechnology , composite material , optoelectronics , capacitance , electrical engineering , electrochemistry , chemistry , thermodynamics , engineering , cyclic voltammetry , physics

Flexible solid-state symmetric supercapacitor was fabricated using MnO2 nanofilms growing directly on carbon cloth as the electrodes and PVA/H3PO4 gel as the electrolyte/separator. The device can be operated at a stable cell-voltage up to 1.4 V, obviously larger than that of conventional solid-state symmetric supercapacitors (≤1 V). It exhibited excellent rate capability with a scan rate as high as 20 V s−1 and a long cyclability (∼60000 cycles) even under severe mechanical deformation. The charge storage mechanism at different scan rates was also quantitatively analyzed

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