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Wearable supercapacitors based on nickel tungstate decorated commercial cotton fabrics
Author(s) -
Hekmat Farzaneh,
Tutel Yusuf,
Unalan Husnu Emrah
Publication year - 2020
Publication title -
international journal of energy research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.808
H-Index - 95
eISSN - 1099-114X
pISSN - 0363-907X
DOI - 10.1002/er.5493
Subject(s) - supercapacitor , tungstate , materials science , capacitance , energy storage , nickel , nanotechnology , composite material , metallurgy , electrode , power (physics) , chemistry , physics , quantum mechanics
Summary Symmetric supercapacitors (SSCs) with remarkable energy storing capability, high specific power as well as long‐term cyclic stability were fabricated from nickel tungstate (NiWO 4 ) @ nickel oxide (NiO x ) decorated commercial cotton fabrics (CCFs). A commercial cotton‐based textile was first made conductive by the state of the art ultrasonic spray coating method. This was followed by chemical and electrochemical processes to decorate activated CCFs with NiO x and NiWO 4 , respectively. The assembled SSCs had the merit of high specific energy of 12 μWh cm −2 at a specific power of 69 μW cm −2 while showing reasonable cyclic stability. Fabricated devices retained over 80% of their initial capacitance after 5500 continuous charge/discharge cycles. The flexibility of the devices was investigated under bending, twisting, and folding providing reliable evidence on the wearability of the fabricated SSCs. Cyclic voltammograms of the fabricated NiWO 4 @NiO x @CCF SSCs showed only a slight change and retained over 95% of the capacitance under bending and folding. The fabricated NiWO 4 @NiO x @CCF SSCs, in this regard, are promising energy storage systems to power up high‐performance wearable electronics.