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Integrated Photoelectrochemical Solar Energy Conversion and Organic Redox Flow Battery Devices
Author(s) -
Li Wenjie,
Fu HuiChun,
Li Linsen,
CabánAcevedo Miguel,
He JrHau,
Jin Song
Publication year - 2016
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201606986
Subject(s) - energy storage , flow battery , energy transformation , solar energy , electrochemical energy conversion , photoelectrochemical cell , materials science , energy conversion efficiency , photovoltaic system , battery (electricity) , electrochemistry , optoelectronics , nanotechnology , chemistry , electrode , electrical engineering , power (physics) , quantum mechanics , physics , electrolyte , thermodynamics , engineering
Building on regenerative photoelectrochemical solar cells and emerging electrochemical redox flow batteries (RFBs), more efficient, scalable, compact, and cost‐effective hybrid energy conversion and storage devices could be realized. An integrated photoelectrochemical solar energy conversion and electrochemical storage device is developed by integrating regenerative silicon solar cells and 9,10‐anthraquinone‐2,7‐disulfonic acid (AQDS)/1,2‐benzoquinone‐3,5‐disulfonic acid (BQDS) RFBs. The device can be directly charged by solar light without external bias, and discharged like normal RFBs with an energy storage density of 1.15 Wh L −1 and a solar‐to‐output electricity efficiency (SOEE) of 1.7 % over many cycles. The concept exploits a previously undeveloped design connecting two major energy technologies and promises a general approach for storing solar energy electrochemically with high theoretical storage capacity and efficiency.