Self‐Charged Dual‐Photoelectrode Vanadium–Iron Energy Storage Battery

Abstract

The efficient utilization of solar energy in battery systems has emerged as a crucial strategy for promoting green and sustainable development. In this study, an innovative dual‐photoelectrode vanadium–iron energy storage battery (Titanium dioxide (TiO2) or Bismuth vanadate (BiVO4) as photoanodes, polythiophene (pTTh) as photocathode, and VO2+/Fe3+ as redox couples.) is proposed, which can autonomously charge under sunlight. The dual‐photoelectrode structure enables the efficient harnessing of solar energy. All processes are spontaneous and do not require external power sources. It is noteworthy that the vanadium–iron energy storage battery demonstrates excellent stability and remarkably low cost. The results show that the combinations of TiO2‐pTTh and BiVO4‐pTTh as photoelectrodes achieve spontaneous conversion rates of 29.17% and 25.46% for VO2+ and 25.6% and 23% for Fe3+ after 4 h of light charging. This study offers a promising solution for the development of large‐scale, low‐cost solar energy storage batteries.

Dual Engine Boosts Organic Photoelectrochemical Transistor for Enhanced Modulation and Bioanalysis

“…With the integration of both the photoanode and photocathode, dual-photoelectrode systems have proved superiority over single-photoelectrode system across diverse sectors, such as photocatalysis, electrochemiluminescence, and photovoltaic. − In biosensors, dual-photoelectrode systems have exhibited enhanced photoelectric response due to the dual responses and the so-called “self-biasing” effect, which has been increasingly applied for detecting various targets. , Further endeavors have been made to enhance photoelectric conversion efficiency through exploring new materials or constructing heterojunctions upon one or two photoelectrodes. For example, Yan et al employed WO 3 @CdS photoanode and Co-CuInS 2 photocathode for the analysis of carcinoembryonic antigen .…”