Photo-assisted symmetric and asymmetric supercapacitors based on molybdenum cobalt coated bismuth vanadate photoelectrodes: All-in-one energy harvesting and storage devices

被引：0

作者：

Renani, Atefeh Sharifi ^{[1
]}

Hosseini, Zohreh ^{[1
]}

Eberhart, Denis ^{[2
,3
]}

Maijenburg, A. Wouter ^{[2
,3
]}

Momeni, Mohamad Mohsen ^{[1
]}

机构：

[1] Isfahan Univ Technol, Dept Chem, Esfahan 8415683111, Iran

[2] Martin Luther Univ Halle Wittenberg, Inst Chem, Inorgan Chem, Kurt Mothes Str 2, D-06120 Halle, Germany

[3] Martin Luther Univ Halle Wittenberg, Ctr Innovat Competence SiLi Nano, Karl Freiherr von Fritsch Str 3, D-06120 Halle, Germany

来源：

JOURNAL OF POWER SOURCES | 2025年 / 640卷

关键词：

Photorechargeable supercapacitors; Molybdenum-cobalt; Bismuth vanadate; Electrodeposition; PHOTOCAPACITOR; PERFORMANCE; HYBRID; PHOTOCATALYST; CAPACITORS; CONVERSION; BATTERIES; VOLTAGE;

D O I：

10.1016/j.jpowsour.2025.236687

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

In this paper, we developed photoresponsive heterogeneous interfaces between bismuth vanadate (BiVO4) and molybdenum cobalt (MoCo) to improve the performance of photo-assisted supercapacitors. We measured the areal capacitance under both dark and illuminated conditions using cyclic voltammetry and galvanostatic charge-discharge. An increase in areal capacitance of approximately 50 %-275 % was observed for prepared samples with different Mo:Co ratios under illumination, measured by galvanostatic charge-discharge (GCD) at 0.02 mA/cm2. The optimal MoCo@BiVO4 electrode showed a favorable energy storage capacity of 725 mF/cm2 when irradiated with a xenon lamp. In addition, we have developed novel photochargeable supercapacitors using MoCo@BiVO4 electrodes as dual functional materials, focusing on the fabrication of symmetric and asymmetric photosupercapacitors using MoCo@BiVO4 and graphite sheets (GS) as electrode materials. We then investigated their supercapacitive performance in a polyvinyl alcohol (PVA)-potassium chloride (KCl) gel polymer electrolyte. These photochargeable supercapacitors show a capacitance of 136 mF/cm2 and 240 mF/cm2 at 0.15 mA/cm2 under dark and light illumination, respectively. In addition, the energy density of the fabricated devices increased from 4.5 mWh/cm2 to 15 mWh/cm2 (for symmetric supercapacitors) and from 153 mWh/cm2 to 270 mWh/cm2 (for asymmetric supercapacitors) at a power density of 0.15 mW/cm2 under light.

引用

页数：13