Multifunctional Self‐Charging Electrochromic Supercapacitors Driven by Direct‐Current Triboelectric Nanogenerators

Electrochromic supercapacitor devices (ESCDs) are highly promising for energy‐saving applications or smart windows, whereas they still require electrical energy inputs. In this study, a self‐charging ESCD (SC‐ESCD) based on the ESCD and a sliding‐mode direct‐current triboelectric nanogenerators is s...

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Bibliographic Details
Published in:Advanced functional materials 2021-09, Vol.31 (36), p.n/a
Main Authors: Guo, Wenbin, Cong, Zifeng, Guo, Zi Hao, Zhang, Panpan, Chen, Yanghui, Hu, Weiguo, Wang, Zhong Lin, Pu, Xiong
Format: Article
Language:English
Subjects:
Charging
electrochromic supercapacitors
Electrochromism
Energy
Energy harvesting
Energy storage
Kinetic energy
Materials science
Nanogenerators
Power sources
self‐charging power systems
Sliding
Smart materials
smart windows
Supercapacitors
triboelectric nanogenerators
Windows (apertures)
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Summary:Electrochromic supercapacitor devices (ESCDs) are highly promising for energy‐saving applications or smart windows, whereas they still require electrical energy inputs. In this study, a self‐charging ESCD (SC‐ESCD) based on the ESCD and a sliding‐mode direct‐current triboelectric nanogenerators is successfully proposed. The SC‐ESCD cannot merely convert mechanical sliding kinetic energy into electrical energy and store the electricity in electrochromic supercapacitors but can also show optical responses to the mechanical sliding motions. The prominent electrochemical performances of the SC‐ESCD are confirmed by the high areal capacitance (15.2 mF cm−2 at 0.1 mA cm−2) and stable cycling performance (99% for 5000 cycles). Besides, it can be prepared into arbitrary characters or patterns to adapt to various applications. The study demonstrates a potential approach to develop multifunctional self‐charging power sources which combine energy harvesting, energy storage, and electrochromic functions. Self‐charging electrochromic supercapacitor devices are demonstrated, which cannot only scavenge and store the sliding kinetic energy but also show optical responses according to the mechanical motions.
ISSN:1616-301X
1616-3028
DOI:10.1002/adfm.202104348