La0.75Sr0.25Cr0.5Mn0.5O3- as cathode for electrolysis and co-electrolysis of CO2 and H2O in solid oxide electrolysis cell
La0.75Sr0.25Cr0.5Mn0.5O3- as cathode for electrolysis and co-electrolysis of CO2 and H2O in solid oxide electrolysis cell
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DOI：
10.1016/j.ceramint.2021.05.049
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发表时间：
2021-05
影响因子：
5.2
通讯作者：
Zheng Ma;Yongyong Li;Yifeng Zheng;Wenlu Li;Xing Chen;Xiufu Sun;Xing Chen;Juan Zhou
中科院分区：
文献类型：
--
作者：
Zheng Ma;Yongyong Li;Yifeng Zheng;Wenlu Li;Xing Chen;Xiufu Sun;Xing Chen;Juan Zhou
固体氧化物电解电池（SOEC）的阴极作为燃气电解/共电解的场所，其性能对电解效率有重要影响。La0.75Sr0.25Cr0.5Mn0.5O3-δ(LSCM)具有良好的氧化还原稳定性和对燃气的催化能力，是一种很有潜力的SOEC正极材料。制备了电解质支撑的LSCM/YSZ/LSCM对称槽和LSCM/YSZ/LSCF全槽，并对高温蒸汽电解、二氧化碳电解和共电解进行了评价。在外加电压作用下，对称电解槽和全电解槽均能有效电解co2和H2O。在实验过程中，通过改变操作条件，研究了不同温度、co2和H2O浓度、外加电压对SOEC电化学性能的影响。为了进一步验证SOEC的长期性能，采用恒电压对co2和H2O进行共电解。在整个电解过程中，在1.5 V电压下，SOEC的电流密度稳定在0.1A·cm-2以上，持续时间超过24 h。
The cathode of solid oxide electrolysis cell (SOEC) is used as a place for fuel gas electrolysis/co-electrolysis, and its performance significantly affects the efficiency of electrolysis. La0.75Sr0.25Cr0.5Mn0.5O3-δ(LSCM) is a potential SOEC cathode material due to its excellent redox stability and catalytic ability for fuel gas. An electrolyte-supported LSCM/YSZ/LSCM symmetrical cell and LSCM/YSZ/LSCF full cell were prepared and evaluated for high temperature steam electrolysis, carbon dioxide electrolysis and co-electrolysis. Under the applied voltage, both the symmetrical electrolysis cell and the full electrolysis cell can effectively electrolysis CO2and H2O. During the experiment, by changing the operating conditions, the influence of different temperatures, concentration of CO2and H2O, and applied voltage was studied to evaluate the electrochemical performance of SOEC. In order to further verify the long-term performance of SOEC, constant voltage was applied for co-electrolysis of CO2and H2O. During the entire electrolysis process, the SOEC showed a stable current density of 0.1A·cm-2under the applied voltage 1.5 V for more than 24 h.