Neutralization and Mixing Entropy Batteries

• Grant number: 15/16867-9
• Support Opportunities: Regular Research Grants
• Start date: December 01, 2015
• End date: November 30, 2017
• Field of knowledge: Physical Sciences and Mathematics - Chemistry - Physical-Chemistry
• Principal Investigator: Fritz Cavalcante Huguenin
• Grantee: Fritz Cavalcante Huguenin
• Host Institution: Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto (FFCLRP). Universidade de São Paulo (USP). Ribeirão Preto , SP, Brazil

Abstract

This project involves the development of a machine capable of performing work when operated between an acid reservoir and another basic in two buffered stages and in two stages with boundaries permeable to matter. Unlike other energy sources, the neutralization batteries contribute to sustainable development, once the energy storage can be obtained from the treatment of acidic wastewater. A practice that can be profitable for industry and at the same time, contributes to environmental preservation. On the other hand, the mixing entropy batteries can be considered a machine that operates between two reservoirs of high and low salt concentration.This project involves studies directed to neutralization and mixing entropy batteries, aiming to produce electrical work from entropy change produced by pH variation and mixing solutions with different salt concentrations. Considering the extensive coastal region and the volume of fluvial water, Brazil has a huge chemical energy reservoir that can be converted into electrical energy. The process of neutralizing for acidic solutions or the exchange of solutions with different salt concentrations (such as NaCl, for example) can be performed with the use of intercalation electrodes, providing the entropy increase and the free energy decrease. Electrodes based on polyoxometalates and polycyanometalates with proton and sodium ion insertion properties will be synthesized and investigated for application as electrodes in these batteries with high storage capacity, insertion rate, and stability in different chemical environments. The materials will be investigated from the electrochemical simulation, cyclic voltammetry, chronopotentiometry, electrochemical impedance spectroscopy, electrochemical microbalance quartz crystal, and scanning electron microscopy. (AU)

Scientific publications

(6)

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

MORAIS, WILLIAM G.; GOMES, WELLINGTON J. A. S.; HUGUENIN, FRITZ. Neutralization Pseudocapacitors: An Acid-Base Machine. Journal of Physical Chemistry C, v. 120, n. 32, p. 17872-17877, AUG 18 2016. (15/16867-9)

MORAIS, WILLIAM G.; LIMA, GILBERTO; GOMES, WELLINGTON J. A. S.; HUGUENIN, FRITZ. Photo-assisted acid-base machine: Battery ensemble to perform work from neutralization reactions. JOURNAL OF ELECTROANALYTICAL CHEMISTRY, v. 823, p. 455-464, AUG 15 2018. (15/16867-9)

MORAIS, WILLIAM G.; LIMA, GILBERTO; GOMES, WELLINGTON J. A. S.; HUGUENIN, FRITZ. Electrochemical Systems for Renewable Energy Conversion from Salinity and Proton Gradients. Journal of the Brazilian Chemical Society, v. 29, n. 5, p. 934-947, MAY 2018. (15/16867-9)

GALIOTE, NELSON A.; ULISSI, ULDERICO; PASSERINI, STEFANO; HUGUENIN, FRITZ. Role Platinum Nanoparticles Play in the Kinetic Mechanism of Oxygen Reduction Reaction in Nonaqueous Solvents. Journal of Physical Chemistry C, v. 122, n. 28, p. 15826-15834, JUL 19 2018. (11/12668-0, 14/15798-0, 15/16867-9)

LIMA, GILBERTO; MORAIS, WILLIAM G.; GOMES, WELLINGTON J. A. S.; HUGUENIN, FRITZ. Acid-base machines: electrical work from neutralization reactions. Physical Chemistry Chemical Physics, v. 19, n. 46, p. 31202-31215, DEC 14 2017. (15/16867-9)

LIMA, GILBERTO; DUBAL, DEEPAK P.; RUEDA-GARCIA, DANIEL; GOMEZ-ROMERO, PEDRO; HUGUENIN, FRITZ. Energy harvesting from neutralization reactions with saline feedback. Electrochimica Acta, v. 275, p. 145-154, JUN 10 2018. (15/17628-8, 15/16867-9)