摘要
A novel iron-hydrogen battery system, whose Fe^(3+)/Fe^(2+)cathode circumvents slowly dynamic oxygen reduction reaction and anode is fed with clean and cordial hydrogen, is systematically investigated. The maximum discharge power density of the iron-hydrogen battery reaches to 96.0 m W/cm^(2) under the room temperature. The capacity reaches to 17.2 Ah/L and the coulombic and energy efficiency are achieved to99% and 86%, respectively, during the galvanostatic charge-discharge test. Moreover, stable cycling test is observed for more than 240 h and 100 cycles with the iron sulfate in the sulfuric acid solutions. It is found that air plasma treatment onto the cathode carbon paper can generate the oxygen-containing groups and increase the hydrophilic pores proportion to ca. 40%, enlarging nearly 6-fold effective diffusion coefficient and improving the mass transfer in the battery performance. The simple iron-hydrogen energy storage battery design offers us a new strategy for the large-scale energy storage and hydrogen involved economy.
基金
financial support granted by National Key R&D Program of China (No.2020YFB1505704)
Dongyue Polymer Material Company of Dongyue Federation
State Key Laboratory of Fluorinated Functional Membrane Materials (Dongyue Group institute)
Dongyue Future Hydrogen Energy Materials Company
sponsored by the Collaborative Innovation Center of Suzhou Nano Science and Technology。
