Energy storage and hydrogen production by proton conducting solid oxide electrolysis cells with a novel heterogeneous design

•A novel design is proposed for proton conducting solid oxide electrolysis cell.•Energy efficiency and stability are considered in this novel heterogeneous design.•The merits of proton-conducting materials can be taken advantage of in this design.•The drawbacks of proton-conducting materials can be...

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Veröffentlicht in:Energy conversion and management 2020-08, Vol.218, p.113044, Article 113044
Hauptverfasser: Lei, Libin, Zhang, Jihao, Guan, Rongfeng, Liu, Jianping, Chen, Fanglin, Tao, Zetian
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container_issue
container_start_page 113044
container_title Energy conversion and management
container_volume 218
creator Lei, Libin
Zhang, Jihao
Guan, Rongfeng
Liu, Jianping
Chen, Fanglin
Tao, Zetian
description •A novel design is proposed for proton conducting solid oxide electrolysis cell.•Energy efficiency and stability are considered in this novel heterogeneous design.•The merits of proton-conducting materials can be taken advantage of in this design.•The drawbacks of proton-conducting materials can be circumvented in this design. The proton-conducting solid oxide electrolysis cell is a promising technology for energy storage and hydrogen production. However, because of the aggressive humid condition in the air electrode side, the stability of electrolysis cells is still a concern. In addition, the energy efficiency needs further improvement before its practical application. In this work, considering both stability and energy efficiency, a novel heterogeneous design is proposed for proton-conducting solid oxide electrolysis cells. In this heterogeneous design, the merits of proton-conducting materials can be taken advantage of and the drawbacks of proton-conducting materials can be circumvented synchronously, resulting in better stability and higher efficiency of electrolysis cells. The feasibility and advantages of the heterogeneous design are demonstrated in electrolysis cells with yttrium and zirconium co-doped barium cerate-nickel as the fuel electrode material and yttrium-doped barium zirconate as the electrolyte material by experiment and modeling. The experimental results demonstrate that compared with the conventional homogeneous design, this novel design can efficiently improve the proton conductivity of the yttrium-doped barium zirconate electrolyte (from 0.88 × 10−3 S cm−1 to 2.13 × 10−3 S cm−1 at 873 K) and slightly improve the ionic transport number of the electrolyte (from 0.941 to 0.964 at 873 K), resulting in better electrochemical performance. The electrolysis cells with this design also show good stability. Moreover, the simulation results show that the faradaic efficiency and energy efficiency of electrolysis cells are improved by applying this novel design. These impressive results demonstrate that heterogeneous design is a rational design for high-performance and efficient proton-conducting solid oxide electrolysis cell.
doi_str_mv 10.1016/j.enconman.2020.113044
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The proton-conducting solid oxide electrolysis cell is a promising technology for energy storage and hydrogen production. However, because of the aggressive humid condition in the air electrode side, the stability of electrolysis cells is still a concern. In addition, the energy efficiency needs further improvement before its practical application. In this work, considering both stability and energy efficiency, a novel heterogeneous design is proposed for proton-conducting solid oxide electrolysis cells. In this heterogeneous design, the merits of proton-conducting materials can be taken advantage of and the drawbacks of proton-conducting materials can be circumvented synchronously, resulting in better stability and higher efficiency of electrolysis cells. The feasibility and advantages of the heterogeneous design are demonstrated in electrolysis cells with yttrium and zirconium co-doped barium cerate-nickel as the fuel electrode material and yttrium-doped barium zirconate as the electrolyte material by experiment and modeling. The experimental results demonstrate that compared with the conventional homogeneous design, this novel design can efficiently improve the proton conductivity of the yttrium-doped barium zirconate electrolyte (from 0.88 × 10−3 S cm−1 to 2.13 × 10−3 S cm−1 at 873 K) and slightly improve the ionic transport number of the electrolyte (from 0.941 to 0.964 at 873 K), resulting in better electrochemical performance. The electrolysis cells with this design also show good stability. Moreover, the simulation results show that the faradaic efficiency and energy efficiency of electrolysis cells are improved by applying this novel design. These impressive results demonstrate that heterogeneous design is a rational design for high-performance and efficient proton-conducting solid oxide electrolysis cell.</description><identifier>ISSN: 0196-8904</identifier><identifier>EISSN: 1879-2227</identifier><identifier>DOI: 10.1016/j.enconman.2020.113044</identifier><language>eng</language><publisher>Oxford: Elsevier Ltd</publisher><subject>Barium ; Barium zirconates ; Computer simulation ; Design ; Electrochemical analysis ; Electrochemistry ; Electrode materials ; Electrodes ; Electrolysis ; Electrolytes ; Electrolytic cells ; Energy efficiency ; Energy storage ; Heterogeneous design ; Hydrogen production ; Hydrogen storage ; Hydrogen-based energy ; Nickel ; Proton conductors ; Protons ; Solid oxide electrolysis cells ; Stability ; Yttrium ; Zirconium</subject><ispartof>Energy conversion and management, 2020-08, Vol.218, p.113044, Article 113044</ispartof><rights>2020 Elsevier Ltd</rights><rights>Copyright Elsevier Science Ltd. 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The proton-conducting solid oxide electrolysis cell is a promising technology for energy storage and hydrogen production. However, because of the aggressive humid condition in the air electrode side, the stability of electrolysis cells is still a concern. In addition, the energy efficiency needs further improvement before its practical application. In this work, considering both stability and energy efficiency, a novel heterogeneous design is proposed for proton-conducting solid oxide electrolysis cells. In this heterogeneous design, the merits of proton-conducting materials can be taken advantage of and the drawbacks of proton-conducting materials can be circumvented synchronously, resulting in better stability and higher efficiency of electrolysis cells. The feasibility and advantages of the heterogeneous design are demonstrated in electrolysis cells with yttrium and zirconium co-doped barium cerate-nickel as the fuel electrode material and yttrium-doped barium zirconate as the electrolyte material by experiment and modeling. The experimental results demonstrate that compared with the conventional homogeneous design, this novel design can efficiently improve the proton conductivity of the yttrium-doped barium zirconate electrolyte (from 0.88 × 10−3 S cm−1 to 2.13 × 10−3 S cm−1 at 873 K) and slightly improve the ionic transport number of the electrolyte (from 0.941 to 0.964 at 873 K), resulting in better electrochemical performance. The electrolysis cells with this design also show good stability. Moreover, the simulation results show that the faradaic efficiency and energy efficiency of electrolysis cells are improved by applying this novel design. 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The proton-conducting solid oxide electrolysis cell is a promising technology for energy storage and hydrogen production. However, because of the aggressive humid condition in the air electrode side, the stability of electrolysis cells is still a concern. In addition, the energy efficiency needs further improvement before its practical application. In this work, considering both stability and energy efficiency, a novel heterogeneous design is proposed for proton-conducting solid oxide electrolysis cells. In this heterogeneous design, the merits of proton-conducting materials can be taken advantage of and the drawbacks of proton-conducting materials can be circumvented synchronously, resulting in better stability and higher efficiency of electrolysis cells. The feasibility and advantages of the heterogeneous design are demonstrated in electrolysis cells with yttrium and zirconium co-doped barium cerate-nickel as the fuel electrode material and yttrium-doped barium zirconate as the electrolyte material by experiment and modeling. The experimental results demonstrate that compared with the conventional homogeneous design, this novel design can efficiently improve the proton conductivity of the yttrium-doped barium zirconate electrolyte (from 0.88 × 10−3 S cm−1 to 2.13 × 10−3 S cm−1 at 873 K) and slightly improve the ionic transport number of the electrolyte (from 0.941 to 0.964 at 873 K), resulting in better electrochemical performance. The electrolysis cells with this design also show good stability. Moreover, the simulation results show that the faradaic efficiency and energy efficiency of electrolysis cells are improved by applying this novel design. 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ispartof Energy conversion and management, 2020-08, Vol.218, p.113044, Article 113044
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source Elsevier ScienceDirect Journals
subjects Barium
Barium zirconates
Computer simulation
Design
Electrochemical analysis
Electrochemistry
Electrode materials
Electrodes
Electrolysis
Electrolytes
Electrolytic cells
Energy efficiency
Energy storage
Heterogeneous design
Hydrogen production
Hydrogen storage
Hydrogen-based energy
Nickel
Proton conductors
Protons
Solid oxide electrolysis cells
Stability
Yttrium
Zirconium
title Energy storage and hydrogen production by proton conducting solid oxide electrolysis cells with a novel heterogeneous design
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