Electrochemical Performance and Degradation Mechanisms of BaCe 0.7 Zr 0.1 Y 0.2 O 3‐δ /BaZr 0.8 Y 0.2 O 3‐δ Based Tubular Protonic Ceramic Electrolysis Cells and Stacks for Stable Hydrogen Production
Year: 2025
Type: article
Abstract: Protonic Ceramic Electrolysis Cells (PCECs) attract much attention for efficient green hydrogen production in recent years, however, their application is still limited due to the lack of stable and robust large area single cells. In this paper, small batch production of large area tubular PCEC single cells with 10–31 cm 2 effective area is reported, and PCEC stacks are assembled and evaluated. The assembled 4‐cell‐stack in parallel based on BaZr 0.8 Y 0.2 O 3‐δ (BZY) electrolyte cells achieves 26 W and 257 mA cm −2 at 1.4 V, and it maintains hydrogen production for 15 200 h at 700 °C with a degradation rate of 1.4% 1000 h −1 . Ni agglomeration and BaCO 3 formation are found to be the main degradation mechanisms by post‐mortem analysis. The added BaCe 0.7 Zr 0.1 Y 0.2 O 3‐δ (BCZY) electrolyte interlayer improves the electrochemical performance and the 15 cm 2 single cell can get an electrolysis current density of 200 mAcm −2 at 1.3 V and 550 °C. The assembled 4‐cell‐stack in combined serial and parallel connections achieves 58 W at 650 °C. Several thermal cycles to room temperature of the single cell and stack are both achieved to show structural stability and reliability. All these results show excellent stability of BZY material and Ni‐BCZY electrode supported tubular structure for PCEC applications.
Source: Small
Language: English
Subfield: Materials Chemistry
Field: Materials Science
Domain: Physical Sciences
Open Access status: bronze
Awards: G1561210188, G5697201922, G7289818407
OpenAlex ID: W4409307295