Study On Integrated Loading Of Oxygen Cathode Membrane Electrode In Battery Based On Electrospinning Technology

Low-cost development and efficient utilization of new energy devices is one of the main approaches to solve the energy problem.In the face of the oxygen cathode membrane electrode assembly which is difficult to be commercialized at present and with the advantage of electrospinning,a process route on the integration of preparation and fabrication of the oxygen cathode double-layer assembly arises at the historical moment.Non-noble metals with low cost and high abundance are used as raw materials to replace commercial noble metals.At the same time,fiber precursors with uniform size and well morphology can be produced on a large scale by electrospinning technology.The application of electrospinning technology in the development of oxygen cathode catalyst layer has a bright future to be adopted in the industrial production.In recent years,based on the work of electrospinning technology applied in oxygen reduction reaction catalysis,the activity of electrospinning fibers is improved mainly through solution composition regulation,innovating spinneret to construct specific structure on fibers,fiber substrate functionalization,and heteroatom doping.In this study,the synthesis of a high-performance single oxygen cathode catalyst layer by electrospinning technology is firstly explored.Importantly,the effective coordination and dispersion effect of glucose on Fe atoms and the hierarchical structural transformation relationship on the fiber surface at different carbonization temperatures are investigated.The indexes of the single catalyst layer with the best performance are comparable to those of the noble metal electrode,and its half-wave potential of 0.86 V is very close to commercial Pt electrode.Then the proposition about collecting the precursor fibers on the gas diffusion layer is innovatively created,and then pyrolysis stage is carried out together to obtain the home-made oxygen cathode membrane electrode double-layer assembly.This strategy realizes the integrated operation of the catalyst layer from preparation to fabrication and simplifies the process route.Finally,the home-made double-layer assembly is loaded into micro new energy devices and successfully operated,which opens up a new gate for the application of electrospinning technology in the field of new energy.