Perovskite SrCo 0.9 Nb 0.1 O 3− δ   as an Anion‐Intercalated Electrode Material for Supercapacitors with Ultrahigh Volumetric Energy Density | Zendy

Zhu Liang | Zendy; Liu Yu | Zendy; Su Chao | Zendy; Zhou Wei | Zendy; Liu Meilin | Zendy; Shao Zongping | Zendy

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Perovskite SrCo 0.9 Nb 0.1 O 3− δ as an Anion‐Intercalated Electrode Material for Supercapacitors with Ultrahigh Volumetric Energy Density

Author(s) -

Zhu Liang,

Liu Yu,

Su Chao,

Zhou Wei,

Liu Meilin,

Shao Zongping

Publication year - 2016

Publication title -

angewandte chemie international edition

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 5.831

H-Index - 550

eISSN - 1521-3773

pISSN - 1433-7851

DOI - 10.1002/anie.201603601

Subject(s) - supercapacitor , gravimetric analysis , capacitance , electrolyte , electrode , materials science , current density , perovskite (structure) , ion , inorganic chemistry , chemical engineering , analytical chemistry (journal) , chemistry , chromatography , physics , organic chemistry , quantum mechanics , engineering

We have synthesized and characterized perovskite‐type SrCo 0.9 Nb 0.1 O 3− δ (SCN) as a novel anion‐intercalated electrode material for supercapacitors in an aqueous KOH electrolyte, demonstrating a very high volumetric capacitance of about 2034.6 F cm −3 (and gravimetric capacitance of ca. 773.6 F g −1 ) at a current density of 0.5 A g −1 while maintaining excellent cycling stability with a capacity retention of 95.7 % after 3000 cycles. When coupled with an activated carbon (AC) electrode, the SCN/AC asymmetric supercapacitor delivered a specific energy density as high as 37.6 Wh kg −1 with robust long‐term stability.

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