Photoelectrochemical regeneration of all vanadium redox species for construction of a solar rechargeable flow cell

作     者：Shichao Liao Jingying Shi Chunmei Ding Mingyao Liu Fengqiang Xiong Nan Wang Jian Chen Can Li 

作者机构：State Key Laboratory of CatalysisDalian Institute of Chemical PhysicsChinese Academy of Sciences Dalian National Laboratory for Clean EnergyiCHEMDalian 116023LiaoningChina University of Chinese Academy of SciencesBeijing 100049China 

出 版 物：《Journal of Energy Chemistry》 (能源化学（英文版）)

年 卷 期：2018年第27卷第1期

页      面：278-282页

核心收录：

学科分类：081705[工学-工业催化] 08[工学] 0817[工学-化学工程与技术] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：financially supported by the National Natural Science Foundation of China(grant no.21573230) 973 National Basic Research Program of the Ministry of Science and Technology(grant no.2014CB239400) 

主　　题：Photoelectrocatalysis Vanadium species Photocharge Solar energy storage 

摘      要：Energy storage is pivotal for the continuous utilization of solar energy suffering from the intermittency issue. Herein, we demonstrate a solar rechargeable flow cell（SRFC） based on photoelectrochemical regeneration of vanadium redox species for in-situ solar energy harvest and storage. In this device, TiO_2 and MWCNT/acetylene black（MWCNT/AB） composite are served as the photoanode and the counter electrode,respectively, with all vanadium redox couples, VO_2~＋/VO^（2＋）and VO^（2＋）/V^（3＋）, as solar energy storage *** from solar energy, the cell can be photocharged under a bias as low as 0.1 V, which is much lower than the discharge voltage of ~0.5 V. Photocharged under the optimized condition, the cell delivers a discharge energy of 23.0 mWh/L with 67.4% input electric energy savings. This prototype work may inspire the rational design for cost-effective solar energy storage devices.