Co-production of hydrogen, oxygen, and electricity via an integrated solar-driven system with decoupled water electrolyzer and Na-Zn ion battery  

作　　者：Fei Lv Longjie Liu Jiazhe Wu Pengfei Wang Lixia Pan Dengwei Jing Yubin Chen 

机构地区：[1]International Research Center for Renewable Energy,State Key Laboratory of Multiphase Flow in Power Engineering,Xi’an Jiaotong University,Xi’an 710049,Shaanxi,China

出　　处：《Journal of Energy Chemistry》2025年第1期621-627,共7页能源化学(英文版)

基　　金：National Natural Science Foundation of China (Nos. 52488201, 52076177, and 52476222);China National Key Research and Development Plan Project (No. 2021YFF0500503);Key Research and Development Program of Shaanxi (No. 2024GH-YBXM-02);China Fundamental Research Funds for the Central Universities。

摘　　要：Combining water electrolysis and rechargeable battery technologies into a single system holds great promise for the co-production of hydrogen (H_(2)) and electricity.However,the design and development of such systems is still in its infancy.Herein,an integrated hydrogen-oxygen (O_(2))-electricity co-production system featuring a bipolar membrane-assisted decoupled electrolyzer and a Na-Zn ion battery was established with sodium nickelhexacyanoferrate (NaNiHCF) and Zn^(2+)/Zn as dual redox electrodes.The decoupled electrolyzer enables to produce H_(2)and O_(2)in different time and space with almost 100%Faradaic efficiency at 100 mA cm^(-2).Then,the charged NaNiHCF and Zn electrodes after the electrolysis processes formed a Na-Zn ion battery,which can generate electricity with an average cell voltage of 1.75 V at 10 m A cm^(-2).By connecting Si photovoltaics with the modular electrochemical device,a well-matched solar driven system was built to convert the intermittent solar energy into hydrogen and electric energy with a solar to hydrogen-electricity efficiency of 16.7%,demonstrating the flexible storage and conversion of renewables.

关 键 词：HYDROGEN ELECTRICITY Decoupled water electrolyzer Na-Zn ion battery Solar energy 

分 类 号：TM912[电气工程—电力电子与电力传动] TQ116.2[化学工程—无机化工]