Membrane-less Direct Formate Fuel Cell Using an Fe-N-Doped Bamboo Internode as the Binder-Free and Monolithic Air-Breathing Cathode.,ACS Applied Materials & Interfaces

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Membrane-less Direct Formate Fuel Cell Using an Fe-N-Doped Bamboo Internode as the Binder-Free and Monolithic Air-Breathing Cathode.
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2020-05-22 , DOI: 10.1021/acsami.0c04277
Linghan Lan _{1,

2} , Wei Yang ₃ , Jun Li _{1,

2} , Liang Zhang _{1,

2} , Qian Fu _{1,

2} , Qiang Liao _{1,

2}

Affiliation

Commercial applications of direct liquid fuel cells require a high-performance, cost-effective, robust, and mechanically/chemically stable cathode for the oxygen reduction reaction. In this study, a membrane-less direct formate fuel cell (DFFC) was constructed by using a Fe–N-doped bamboo internode as the binder-free and monolithic air-breathing cathode and a Pd-electrodeposited graphite rod as the anode. The effect of the preparation procedures including alkali activation, pyrolysis with (NH₄)₃PO₄, and solvothermal treatment with iron phthalocyanine on the physicochemical properties of the cathode is studied with respect to the textural structure, electrical conductivity, and heteroatom incorporation. The results indicated that the resulting cathode exhibited proper distribution of primary/secondary pores for the transport of reactants and ions. Additionally, these procedures effectively increased the electrical conductivity and heteroatom incorporation in the carbon matrix of the as-obtained cathode. The fabricated membrane-less DFFC delivered an open-circuit voltage of 1.04 V and a maximum power density of 10.01 ± 0.16 mW cm^–3 with a limiting current density of 48.95 ± 1.84 mA cm^–3. In addition, this DFFC achieved a high columbic efficiency of 92.3% after 7 h of discharge with one-fueling. Furthermore, the 110 h discharge test at 10 mA cm^–3 demonstrated that the DFFC fabricated with the Fe–N-doped bamboo internode cathode exhibited good stability, showing its promising application as an inexpensive power supply in portable electronics.

中文翻译：

无膜直接格式化燃料电池，使用Fe-N掺杂的竹节间作为无粘合剂和整体式呼吸阴极。

直接液体燃料电池的商业应用需要用于氧还原反应的高性能，成本有效，坚固且机械/化学稳定的阴极。在这项研究中，通过使用掺有Fe-N的竹节间作为无粘结剂和整体式空气呼吸阴极，并使用Pd电沉积石墨棒作为阳极，构建了无膜直接甲酸燃料电池（DFFC）。制备过程的影响包括碱活化，（NH ₄）₃ PO _4的热解，并研究了酞菁铁对阴极的理化性质的溶剂热处理，涉及结构，电导率和杂原子掺入。结果表明，所得的阴极表现出适当的主孔/副孔分布，以输送反应物和离子。另外，这些程序有效地增加了所获得阴极的碳基质中的电导率和杂原子结合。所制造的无膜DFFC的开路电压为1.04 V，最大功率密度为10.01±0.16 mW cm ^–3，极限电流密度为48.95±1.84 mA cm ^–3。此外，该DFFC在一次加油并放电7小时后，达到了92.3％的高哥伦比亚效率。此外，在10 mA cm ^–3的110 h放电测试表明，用掺有Fe-N的竹节间阴极制成的DFFC表现出良好的稳定性，显示了其作为便携式电子产品中廉价电源的有希望的应用。

更新日期：2020-05-22

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