Flexible Asymmetric Threadlike Supercapacitors Based on NiCo Se Nanosheet and NiCo O /Polypyrrole Electrodes.

ChemSusChem

CSIRO Manufacturing, 75 Pigdons Road, Waurn Ponds, Victoria, 3216, Australia.

Published: April 2017

Flexible threadlike supercapacitors with improved performance are needed for many wearable electronics applications. Here, we report a high performance flexible asymmetric all-solid-state threadlike supercapacitor with a NiCo Se positive electrode and a NiCo O @PPy (PPy: polypyrrole) negative electrode. The as-prepared electrodes display outstanding volume specific capacitance (14.2 F cm ) and excellent cycling performance (94 % retention after 5000 cycles at 0.6 mA) owing to their nanosheet and nanosphere structures. The asymmetric all-solid-state threadlike supercapacitor expanded the stability voltage window from 0-1.0 V to 0-1.7 V and exhibits high volume energy density (5.18 mWh cm ) and superior flexibility under different bending conditions. This study provides a scalable method for fabricating high performance flexible supercapacitors from easily available materials for use in wearable and portable electronics.

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http://dx.doi.org/10.1002/cssc.201700149DOI Listing

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