Journal
JOURNAL OF ENERGY STORAGE
Volume 52, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.est.2022.104773
Keywords
Filler; Gel electrolyte; Ionic conductivity; Poly(vinyl alcohol); Supercapacitor; TiO2
Categories
Funding
- Young Scholar Fellowship Program by Ministry of Science and Technology (MOST) in Taiwan [MOST 110-2636-E-027-002]
Ask authors/readers for more resources
This study investigates the addition of TiO2 with different particle sizes and phases as an inorganic filler in gel electrolyte for FSC, aiming to enhance the ionic conductivity. Results show that using P25 TiO2 in gel electrolyte can achieve the best energy storage ability for FSC.
Flexible supercapacitor (FSC) with high power density and cycle life has been considered as efficient energy storage device for soft electronics. Gel electrolyte is used in FSC to avoid electrolyte leakage. Titanium dioxide (TiO2) with high dielectric constant and abundant surface vacant sites is regarded as efficient inorganic filler in gel electrolyte. In this work, TiO2 nanoparticles are incorporated in polyvinyl alcohol/H3PO4 gel electrolyte for FSC. Different particle sizes and phases of TiO2 are firstly used as inorganic filler in gel electrolyte to enhance ionic conductivity via reducing crystallinity of polymer. The FSC with P25 TiO2 in gel electrolyte presents the best energy storage ability due to the smallest particle size and preferable phases. The highest specific capacitance (CF) of 69.2 F/g at 20 mV/s is obtained for FSC with optimized P25 TiO2 amount in gel-electrolyte. This FSC also shows the maximum energy density of 5.9 Wh/kg at 300 W/kg, and CF retention of 94% after 3500 charging/discharging cycles. This work demonstrates feasibility of TiO2 as efficient filler in gel electrolyte. It is worthy to study the relation between intrinsic property of TiO2 and energy storage ability of FSC in other gel-electrolyte systems.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available