Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7725405 | Journal of Power Sources | 2018 | 9 Pages |
Abstract
High-temperature H2O/CO2 co-electrolysis through reversible solid oxide electrolysis cell (SOEC) provides potentially a feasible and eco-friendly way to convert electrical energy into chemicals stored in syngas. In this work, La0.8Sr0.2Co0.8Ni0.2O3-δ (LSCN) impregnated Gd0.1Ce0.9O1.95 (GDC)-(La0.8Sr0.2)0.95MnO3-δ (LSM) composite oxygen electrode is studied as high-performance electrode for H2O/CO2 co-electrolysis. The LSCN impregnated cell exhibits competitive performance with the peak power density of 1057â¯mWâ¯cmâ2 at 800â¯Â°C in solid oxide fuel cell (SOFC) mode; in co-electrolysis mode, the current density can reach 1.60â¯Aâ¯cmâ2 at 1.5â¯Vâ¯at 800â¯Â°C with H2O/CO2 ratio of 2/1. With LSCN nanoparticles dispersed on the surface of GDC-LSM to maximize the reaction active sites, the LSCN impregnated cell shows significant enhanced electrochemical performance at both SOEC and SOFC modes. The influence of feed gas composition (H2O-H2-CO2) and operating voltages on the performance of co-electrolysis are discussed in detail. The cell shows a very stable performance without obvious degradation for more than 100â¯h. Post-test characterization is analyzed in detail by multiple measurements.
Related Topics
Physical Sciences and Engineering
Chemistry
Electrochemistry
Authors
Haoyu Zheng, Yunfeng Tian, Lingling Zhang, Bo Chi, Jian Pu, Li Jian,