综合智慧能源 ›› 2022, Vol. 44 ›› Issue (8): 43-49.doi: 10.3969/j.issn.2097-0706.2022.08.004

• 氧离子导体电池系统 • 上一篇    下一篇

La/Ni共掺杂SrTi0.35Fe0.65O3-δ对称电极用于SOEC共电解H2O/CO2研究

韩倩雯1(), 张琨1(), 陈晓阳1,2(), 朱腾龙1,*()   

  1. 1.南京理工大学 化学与化工学院,南京 210094
    2.哈尔滨工业大学(深圳) 材料科学与工程学院,广东 深圳 518055
  • 收稿日期:2022-07-17 修回日期:2022-08-09 出版日期:2022-08-25 发布日期:2022-09-15
  • 通讯作者: 朱腾龙
  • 作者简介:韩倩雯(1998),女,在读硕士研究生,从事固体氧化物燃料电池方面的研究, hanqw1998@163.com;
    张琨(1999),男,在读硕士研究生,从事固体氧化物燃料电池方面的研究, 2498249631@qq.com;
    陈晓阳(1998),男,在读硕士研究生,从事电催化、锌离子电池的研究, 21S155060@stu.hit.edu.cn
  • 基金资助:
    国家重点研发计划项目(2018YFB1502203);中央高校基本科研业务费专项资金资助项目(30920041108)

Study on La/Ni co-doped SrTi0.35Fe0.65O3-δ symmetric electrode for H2O/CO2 co-electrolysis in SOECs

HAN Qianwen1(), ZHANG Kun1(), CHEN Xiaoyang1,2(), ZHU Tenglong1,*()   

  1. 1. School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
    2. School of Materials Science and Engineering, Harbin Institute of Technology(Shenzhen), Shenzhen 518055, China
  • Received:2022-07-17 Revised:2022-08-09 Online:2022-08-25 Published:2022-09-15
  • Contact: ZHU Tenglong

摘要:

通过固体氧化物电解池(SOEC)电解水蒸气制氢及共电解H2O/CO2生产合成气是拓展可再生能源应用、促进化学工业绿色低碳转型的重要技术路线。面向SOEC对高性能、稳定电极的需求,采用La/Ni共掺杂SrTi0.35Fe0.65O3-δ的电极策略,设计并制备了La0.1Sr0.85Ti0.35Fe0.6Ni0.05O3(LSTFN),并将其同时作为SOEC的氢电极和氧电极。通过扫描电子显微镜(SEM)、能量分散光谱(EDS)和X射线衍射(XRD)等方法,对LSTFN电极结构组成及微观形貌演化进行研究,并考察了单电池共电解H2O/CO2性能和可逆运行稳定性。结果表明,在还原气氛中,LSTFN氢电极表面原位析出了纳米Ni-Fe合金颗粒,并在含水和含碳复杂气氛中稳定存在;在800 ℃,10% H2保护气和1.8 V的条件下(H2/H2O/CO2=10∶45∶45),LSTFN的共电解电流达到了1.8 A/cm2,并在发电/电解可逆条件下稳定运行,表现出良好的应用前景。

关键词: 固体氧化物电解池, CO2/H2O共电解, 对称电极, SrTi0.35Fe0.65O3-δ, 绿色低碳转型, 制氢, 钙钛矿, 可再生能源

Abstract:

Hydrogen production from water steam electrolysis powered by solid oxide electrolysis cells (SOECs) and syngas production by co-electrolysis of H2O/CO2 are important routes to promote the application of renewable energy and development of green and low-carbon chemical industry. To meet the demands for high performance and stable operation of SOECs,La/Ni co-doped SrTi0.35Fe0.65O3-δ strategy was adopted,and La0.1Sr0.85Ti0.35Fe0.6Ni0.05O3 (LSTFN) was designed and prepared as both hydrogen and oxygen electrodes for SOECs. The structural composition and micromorphological evolution of LSTFN electrode were investigated by scanning electron microscopy(SEM), energy dispersive spectroscopy (EDS) and X-ray diffraction (XRD). The H2O/CO2 co-electrolysis performance and reversible operation stability were examined. The results show that, Ni-Fe alloy nanoparticles in-situ precipitated on LSTFN hydrogen electrode surface are stable in complex steam and carbon-containing atmospheres. The LSTFN co-electrolysis current reaches 1.8 A/cm2 in 800 ℃,1.8 V and 10% H2 protective atmosphere(H2/H2O/CO2=10∶45∶45). LSTFN symmetric cell performs stably in reversible operations between power generation and co-electrolysis, showing good application prospects.

Key words: solid oxide electrolysis cell, CO2/H2O co-electrolysis, symmetrical electrode, SrTi0.35Fe0.65O3-δ, green and low-carbon development, hydrogen production, perovskite, renewable energy

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