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High‐Temperature CO 2 Electrolysis in Solid Oxide Electrolysis Cells: Developments, Challenges, and Prospects
Author(s) -
Song Yuefeng,
Zhang Xiaomin,
Xie Kui,
Wang Guoxiong,
Bao Xinhe
Publication year - 2019
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201902033
Subject(s) - electrolysis , overpotential , anode , materials science , electrolyte , oxide , electrochemistry , cathode , polymer electrolyte membrane electrolysis , electrolytic cell , chemical engineering , high temperature electrolysis , electrode , metallurgy , chemistry , engineering
High‐temperature CO 2 electrolysis in solid‐oxide electrolysis cells (SOECs) could greatly assist in the reduction of CO 2 emissions by electrochemically converting CO 2 to valuable fuels through effective electrothermal activation of the stable CO bond. If powered by renewable energy resources, it could also provide an advanced energy‐storage method for their intermittent output. Compared to low‐temperature electrochemical CO 2 reduction, CO 2 electrolysis in SOECs at high temperature exhibits higher current density and energy efficiency and has thus attracted much recent attention. The history of its development and its fundamental mechanisms, cathode materials, oxygen‐ion‐conducting electrolyte materials, and anode materials are highlighted. Electrode, electrolyte, and electrode–electrolyte interface degradation issues are comprehensively summarized. Fuel‐assisted SOECs with low‐cost fuels applied to the anode to decrease the overpotential and electricity consumption are introduced. Furthermore, the challenges and prospects for future research into high‐temperature CO 2 electrolysis in SOECs are included.