Cost‐Effective Passive Ammonia Fuel Cells via Synergistic Integration of Optimized Membrane Electrode Assembly and Prototype
Abstract
Abstract Passive ammonia fuel cells (PAFCs) offer modular adaptability but face dual challenges: limited power density and dependency on noble metals. Here, a comprehensive strategy is presented to address these issues through coordinated materials and system design. Pre‐oxidized nickel substrates direct the formation of β‐phase NiOOH/Ni 3 P (β‐NiOOH/Ni 3 P) heterointerfaces in anode, significantly enhancing ammonia oxidation reaction (AOR) kinetics with a high current density of 171 mA cm −2 at 0.7 V. A spinel‐structured MnCo 2 O 4 /C cathode catalyst demonstrates remarkable ammonia tolerance and outperforms Pt/C in stability. A polytetrafluoroethylene/layered double hydroxide (PTFE/LDH) composite membrane is also introduced, which effectively reduces ammonia crossover. Their integration with an optimized graphite prototype further enhances PAFCs' efficiency and stability. This synergistic multi‐phase optimization enables record‐breaking performance for non‐noble metal‐based PAFCs, achieving a peak power density (PPD) of 61 mW cm −2 and an open circuit voltage (OCV) of 0.87 V (outperforming Pt‐based PAFCs). Stable discharge can be sustained by the present PAFC for 9 h by replenishing the ammonia supply. This work establishes a prototype‐to‐performance strategy for cost‐effective PAFC, highlighting the potential of non‐noble metal catalysts in ammonia electrochemical energy conversion.
Article Details
Authors (12)
Xin Ou‐Yang
Key Laboratory of Automobile Materials Ministry of Education School of Materials Science and Engineering Jilin University Changchun 130022 China
Jun‐Yu Wu
Key Laboratory of Automobile Materials Ministry of Education School of Materials Science and Engineering Jilin University Changchun 130022 China
Zhao‐Hui Wang
Key Laboratory of Automobile Materials Ministry of Education School of Materials Science and Engineering Jilin University Changchun 130022 China
Zi‐Xuan Xiang
Key Laboratory of Automobile Materials Ministry of Education School of Materials Science and Engineering Jilin University Changchun 130022 China
Zi‐Han Teng
Key Laboratory of Automobile Materials Ministry of Education School of Materials Science and Engineering Jilin University Changchun 130022 China
Wei‐Ran Wang
Key Laboratory of Automobile Materials Ministry of Education School of Materials Science and Engineering Jilin University Changchun 130022 China
Xin Jiang
Wei‐Yi Xue
Key Laboratory of Automobile Materials Ministry of Education School of Materials Science and Engineering Jilin University Changchun 130022 China
Bai‐Wen Zhang
Key Laboratory of Automobile Materials Ministry of Education School of Materials Science and Engineering Jilin University Changchun 130022 China
Bao‐Guo Wang
The State Key Laboratory of Chemical Engineering Department of Chemical Engineering Tsinghua University Beijing 100084 China
Fei‐Fei Zhang
Key Laboratory of Automobile Materials Ministry of Education School of Materials Science and Engineering Jilin University Changchun China
Jun‐Min Yan
Key Laboratory of Automobile Materials Ministry of Education School of Materials Science and Engineering Jilin University Changchun China