Journal
CHEMICAL ENGINEERING JOURNAL
Volume 402, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2020.126241
Keywords
Battery-like; Hybrid supercapacitors; Hollow structure; Hollow spheres
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Funding
- Research councils of Shahid Beheshti University
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The application of battery-like electrode materials with complex hollow structures, huge surface areas, and good redox properties is an appealing approach towards the boosting performance of hybrid supercapacitors. This work proposes a facile strategy for the fabrication of copper-cobalt selenide hollow spheres (CCSe-HSs) as a new battery-type electrode for hybrid supercapacitors. Benefiting from the considerable electrical conductivity and rationally porous structures, this electrode exhibits a higher capacitance/capacity of 1775.4F g(-1)/295.9 mAh g(-1) compared with copper-cobalt sulfide hollow spheres (CCS-HSs) and copper-cobalt oxide hollow spheres (CCO-HSs). Besides, an advanced device (CCSe-HSs//AC) constructs by combining copper-cobalt selenide hollow spheres (positive electrode) and activated carbon (AC, negative electrode). Our device reflects reasonable energy and power densities (53.86 W h kg(-1) at 800 W kg(-1), respectively), and desirable cyclability. Our current study provides a rationale and efficient design strategy to engineer new bimetallic selenides with complex hollow structures for different applications.
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