Perovskite SrCo0.9 Nb0.1 O3-δ as an Anion-Intercalated Electrode Material for Supercapacitors with Ultrahigh Volumetric Energy Density

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

doi:10.1002/anie.201603601

Perovskite SrCo0.9 Nb0.1 O3-δ as an Anion-Intercalated Electrode Material for Supercapacitors with Ultrahigh Volumetric Energy Density

Angew Chem Int Ed Engl. 2016 Aug 8;55(33):9576-9. doi: 10.1002/anie.201603601. Epub 2016 Jul 1.

Authors

Liang Zhu¹, Yu Liu², Chao Su², Wei Zhou¹, Meilin Liu³, Zongping Shao^{4

5}

Affiliations

¹ State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemistry & Chemical Engineering, Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University, No. 5 Xin Mofan Road, Nanjing, 210009, P.R. China.
² Department of Chemical Engineering, Curtin University, Perth, Western Australia, 6845, Australia.
³ Center for Innovative Fuel Cell and Battery Technologies, School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA, 30332-0245, USA. meilin.liu@mse.gatech.edu.
⁴ Department of Chemical Engineering, Curtin University, Perth, Western Australia, 6845, Australia. shaozp@njtech.edu.cn.
⁵ State Key Laboratory of Materials-Oriented Chemical Engineering, College of Energy, Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University, No. 5 Xin Mofan Road, Nanjing, 210009, P.R. China. shaozp@njtech.edu.cn.

PMID: 27363300
DOI: 10.1002/anie.201603601

Abstract

We have synthesized and characterized perovskite-type SrCo0.9 Nb0.1 O3-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.

Keywords: electrodes; energy storage; oxygen vacancy; perovskite oxides; supercapacitors.

Publication types

Research Support, Non-U.S. Gov't