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Pbo@graphene nanocomposites: supercapacitor for advanced lead-acid batteries for use in micro hybrid cars and energy accumulators coupled to renewable energies


TECCER has been investing efforts in a new area of innovation of new materials for advanced batteries. Through the absorption of knowledge developed by researchers from groups of R&D in batteries at Universities and Institutes of Science and Technology, TECCER is developing pilot routes for the production of new materials for different applications in their mini pilot plant installed for the production of active PbC - Supercapacitor materials, aimed at the national industry lead-acid battery. These new active materials, applied both to the plates negative as well as positive, allow the batteries to function in a partial charge stage with the increase in useful life, necessary for the new demands on advanced batteries coupled to energies renewable. These materials also increase the charge acceptance of lead acid batteries necessary for use in regenerative braking systems of the new hybrid cars that will be launched in Brazil. For the production of these new materials, TECCER will use the route of incorporating nanocomposites based on carbon and niobium oxide. These new active materials avoid the sulphation of the negative plates with a consequent increase in their useful life, increase considerably the load acceptance for demands known as fast loads, with better energy efficiency by increasing the electrochemically active area, and act as a supercapacitor. There are several challenges for the development routes, including: i) eliminating metallic contaminants on the carbon surface; ii) synthesize surface functional groups; iii)increase hydrogen evolution over potentials; iv) increase the electronic conductivity of the active mass; v) increase capacitance; vi) increase pore sizes in carbon; vii) improve the affinity of carbon for lead; viii) evaluate the interaction with the organic component of the mixture of expander on negative plates; iv) evaluate the wettability by the aqueous electrolyte solution; x) increase the electrochemically active area. The reported problem of these new nanometric active carbon materials is increased H2 gas evolution, especially on the negative plate. Therefore, an important step in the development is the addition of metallic oxide nanoparticles that inhibit these undesirable reactions, such as, for example, those of niobium. These materials may also exhibit 'Pseudocapacitance' and participate in electrochemical processes to generate increments in interaction chemistry between lead and nanocarbon. TECCER will use the strategy of developing these products in such a way that they can be adapted to Latin American battery production plants, with the aim of opening the national market both for the sale of additives and for technology transfers. the technical and economical viability use of nanocomposites based on nanometric PbO and Graphene has been proven, and the results reported in the Phase I report attached in the Sage system. This project presents the continuity of research and development with the deepening of the multielectrode patent and the activities to scale up nanocomposites as additives for lead-carbon batteries. Also marketing plan with market strategies is being sent. (AU)

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