Electroalkaline salt co-produced direct-formate fuel cell

Abstract

An electroalkaline salt co-produced direct-formate fuel cell (Na-DFFC) comprises a flow field arranged on a bipolar plate, a cathode and anode diffusion layer immediately adjacent to the flow field, an anode catalyst layer composed of an anion exchange resin and a non-noble metal catalyst, a cationic membrane in a form of sodium ions and a cathode catalyst layer composed of polytetrafluoroethylene (PTFE) and the non-noble metal catalyst. According to the electroalkaline salt co-produced direct-formate fuel cell, the cationic membrane in the form of sodium ions is used for replacing a traditional anionic membrane aiming at a formate fuel cell, and shortcomings of low ion conductivity and poor stability of the anionic membrane are overcome. An anode takes the anion exchange resin as a binder, so that hydroxide ions required by a reaction are transmitted to corresponding three-phase reaction sites in a more favorable condition. At the same time, the anode does not need to add additional electrolyte (such as sodium hydroxide), energy density of a system is improved, and complexity and input costs of the system are reduced. In addition, the sodium hydroxide and sodium carbonate generated in battery output power process can also be used as chemical raw materials.

Description

technical field [0001] The invention belongs to the field of fuel cells, in particular to a direct formate fuel cell with co-production of electro-alkali salt. Background technique [0002] With the rapid development of the global economy, the burning of more fossil fuels is needed to meet the increasing energy demand, resulting in two major crises of environmental pollution and energy shortage. Therefore, an efficient, renewable, and zero-emission energy system urgently needs to emerge. Fuel cells have come into people's sight due to their advantages of small size, high efficiency and no pollution. Among them, the direct formate fuel cell has the advantages of: 1) low cost of battery fuel, non-toxic, and can be used as a food additive; 2) stable battery fuel, easy to dissolve, easy to store and transport; 3) high theoretical energy density of battery fuel and other advantages , and thus received much attention. [0003] Most of the traditional formate fuel cells are anio...

AI Technical Summary

Problems solved by technology

[0003] Most of the traditional formate fuel cells are anion membrane fuel cells, even the most advanced anion membranes have the disadvantages of low ion conductivity and poor thermal and chemical stability, and need to add additional electrolytes (such as hydrogen oxide Sodium, potassium hydroxide, etc.), on the one hand, it is not friendly to the environment, on the other hand, it reduces the theoretical energy density of battery fuel and increases the complexity and cost of the system

In addition, while the traditional chlor-alkali industry prepares caustic soda, it needs to consume clean electric energy, and it will pollute the environment in the process

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