Abstract: The embodiment herein provides a simple, one-pot and scalable methodology for the synthesis of porous monoliths of Transition-metal-doped-noble-metal nanoparticles for cathode catalyst in a metal-air battery, PEMFCs, AFCs, and anode catalyst in water electrolysers. Silver is used as a base material on which doping is done with the transition metals selected from Cu, Co, Mn, Fe, and Ni.

Abstract: The embodiments herein provide a facile four-step process for the preparation of binder-free graphene felts that are free standing and mechanically robust. The step of deagglomeration of graphene material leads to a uniform size distribution which when combined/integrated with an appropriate moulding technique allows an easy fine tuning of various attributes of graphene felts including electrical conductivity, porosity, surface area, surface morphology and surface functionalization depending on the desired application. Since graphene felts obtained from this process do not incorporate any binder, to achieve better electrical conductivity, electrochemical activity and catalytic and sensing properties compared to conventional graphene felts while not compromising with their mechanical properties.

Abstract: The various embodiments of the present invention provide a method of fabricating carbon felt based electrodes without any binder additive. A coating of conductive polymer adhesives is applied on the current collector. The carbon felts are placed on either side of the current collector to get an assembly. The assembly comprising current collector and carbon felt is placed between the plates of hot press with predetermined conditions for curing the adhesive applied on the surface of current collector and to obtain sandwich structure of electrode. The sandwich structure of electrode is subjected under a roller and pressed depending on required thickness and porosity of the electrodes. The electrodes are cut into desired shape using electrode cutting die in tailoring process. The prepared carbon felt based electrode illustrates high flexibility and mechanical robustness when compared to carbon felt electrodes that are binder based and brittle in nature.

Abstract: The embodiments of the present invention provide a system for optimizing a performance of metal-air fuel cells. The system includes the metal-air fuel cells comprising a plurality of stacks of metal-air fuel cell units. The plurality of stacks of metal-air fuel cell units are designed to be connected in at least one of a series configuration and a parallel configuration. Each metal-air fuel cell unit comprises at least one metal anode sheet placed between at least two cathodes sheets. One or more cathode electrodes (111) are held together with one of an epoxy and a silicone based elastomer adhesive. The at least one metal anode sheet and the at least two cathode sheets are included in a shell apparatus.

Abstract: The embodiments herein provide a facile four-step process for the preparation of binder-free graphene felts that are free standing and mechanically robust. The step of deagglomeration of graphene material leads to a uniform size distribution which when combined/integrated with an appropriate moulding technique allows an easy fine tuning of various attributes of graphene felts including electrical conductivity, porosity, surface area, surface morphology and surface functionalization depending on the desired application. Since graphene felts obtained from this process do not incorporate any binder, to achieve better electrical conductivity, electrochemical activity and catalytic and sensing properties compared to conventional graphene felts while not compromising with their mechanical properties.

Abstract: The embodiments herein disclose a power backup system comprising a graphene-based metal-air battery (GMAB), and at least one auxiliary power source as a secondary and additional back-up. The GMAB comprises an electrolyte reservoir for storing electrolyte; a pump for pumping the electrolyte to a plurality of cells; a filter, coupled to the pump, for entrapping aluminum oxide particles generated by electrolyte flow through the cells, to free the electrolyte from any metal oxide particle impurities; at least one rotameter coupled to the pump; at least one settling tank to remove metal oxide particles from the electrolyte; at least one buffer tank to replenish the electrolyte to a desired composition; and a mechanical refuelling unit for mechanical retraction of consumed aluminum and insertion of a plurality of fresh aluminum cassettes into the cells simultaneously.

Abstract: A system for extending a range of an electric vehicle includes a graphene-based metal-air battery system (GMABS), an electrolyte management system (EMS), a flow management system (FMS), one or more auxiliary power sources, and a real-time monitoring and feedback system (RMS). The GMABS includes multiple cells electrically connected to each other and filled with an electrolyte for initiating a reaction to generate power. The EMS regulates a temperature of the electrolyte flowing through the cells. The FMS regulates a circulation of the electrolyte in the GMABS. At least one auxiliary power source is connected to the GMABS to receive and deliver the power to components of the electric vehicle. The RMS continuously computes and monitors a state of charge of each auxiliary power source in real time to facilitate a continuous power delivery to the electric vehicle, thereby extending the range of the electric vehicle.

Abstract: The embodiments herein provide a facile four-step process for the preparation of binder-free graphene felts that are free standing and mechanically robust. The step of deagglomeration of graphene material leads to a uniform size distribution which when combined/integrated with an appropriate moulding technique allows an easy fine tuning of various attributes of graphene felts including electrical conductivity, porosity, surface area, surface morphology and surface functionalization depending on the desired application. Since graphene felts obtained from this process do not incorporate any binder, to achieve better electrical conductivity, electrochemical activity and catalytic and sensing properties compared to conventional graphene felts while not compromising with their mechanical properties.