Membrane-based alkaline fuel cells have become a research hotspot because of their non-platinum system's high electrochemical reaction rate. However, current liquid alkaline fuel cells (eg, methanol, ethanol, glucose, etc.) still have anion exchange membranes with low ion conductivity, poor thermal and chemical stability, and anode solutions that require additional electrolytes to maintain electrode reactions. The existence of the above problems has limited the development of alkaline fuel cells.
In response to these problems, Professor Li Yinshi from the Academician He Yaling's key laboratory of the Ministry of Education's Key Laboratory of Heat Flow Science and Engineering of the Ministry of Education of Xi'an Jiaotong University, recently proposed a sodium ion direct formate fuel cell without the need for additional electrolytes. The system uses a sodium-based cation membrane with good ion conductivity, thermal stability, and chemical stability as the membrane electrode membrane. At the same time, the hydrolysis of sodium formate provides sufficient OH- and Na+ for electrode reaction and ion transport. Experiments show that when the battery is discharged at 60 °C, the power density reaches 33mW cm-2. In addition, unlike the traditional chlor-alkali industry, this system can achieve synchronous power generation and alkali production without polluting the environment. The preliminary experiment obtained 13 hours of continuous discharge, and the theoretical production of NaOH was 195 mg, which has broad application prospects.
The above research results were published in the form of papers in the top journal of international chemistry, Angewandte Chemie International Edition (impact factor 11.709), entitled “A Sodium-Ion-Conducting Direct Formate Fuel Cell: Generating Electricity and Producing Baseâ€. The paper was selected as very important paper, was selected in the cover of the magazine (Incover Cover) article, was selected by the well-known websites such as material as "Top Cover of the Journal: Top Ten Outstanding Achievements in Materials Field in May", Xi'an Jiaotong University was the only signature of the paper. unit.
This work was supported by projects such as the Youth Thousand Talents Program and the Xi'an Jiaotong University Youth Top Talent Support Program.
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