title: Flexible Asymmetric Threadlike Supercapacitors Based on NiCo2Se4Nanosheet and NiCo2O4/Polypyrrole Electrodes.
abstract: 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 NiCo2Se4positive electrode and a NiCo2O4@PPy (PPy: polypyrrole) negative electrode. The as-prepared electrodes display outstanding volume specific capacitance (14.2 F cm-3) 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-3) 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.
authors.affiliation: Key Laboratory of Catalysis and Materials Science of the State Ethnic Affairs, Commission and Ministry of Education, South-Central University for Nationalities, Wuhan, Hubei Province, 430074, P. R. China.
authors.forename: Qiufan
authors.initials: Q
authors.lastname: Wang
authors.affiliation: Key Laboratory of Catalysis and Materials Science of the State Ethnic Affairs, Commission and Ministry of Education, South-Central University for Nationalities, Wuhan, Hubei Province, 430074, P. R. China.
authors.forename: Yun
authors.initials: Y
authors.lastname: Ma
authors.affiliation: Key Laboratory of Catalysis and Materials Science of the State Ethnic Affairs, Commission and Ministry of Education, South-Central University for Nationalities, Wuhan, Hubei Province, 430074, P. R. China.
authors.forename: Yunlong
authors.initials: Y
authors.lastname: Wu
authors.affiliation: Key Laboratory of Catalysis and Materials Science of the State Ethnic Affairs, Commission and Ministry of Education, South-Central University for Nationalities, Wuhan, Hubei Province, 430074, P. R. China.
authors.forename: Daohong
authors.initials: D
authors.lastname: Zhang
authors.affiliation: CSIRO Manufacturing, 75 Pigdons Road, Waurn Ponds, Victoria, 3216, Australia.
authors.forename: Menghe
authors.initials: M
authors.lastname: Miao
mesh_terms: D003035:Cobalt / Q000737:chemistry*; D025802:Electric Capacitance; D004563:Electrochemistry; D004566:Electrodes; D008958:Models, Molecular; D008968:Molecular Conformation; D049329:Nanostructures / Q000737:chemistry*; D009532:Nickel / Q000737:chemistry*; D010087:Oxides / Q000737:chemistry; D011108:Polymers / Q000737:chemistry*; D011758:Pyrroles / Q000737:chemistry*; D018036:Selenium Compounds / Q000737:chemistry
chemical_list: D010087:Oxides; D011108:Polymers; D011758:Pyrroles; D018036:Selenium Compounds; C067635:polypyrrole; D003035:Cobalt; D009532:Nickel
keywords: asymmetric supercapacitors; bimetallic selenide; energy storage; nanosheets; polypyrrole