3results about How to "Raise the overpotential" patented technology

The invention discloses a stable electrochemical extraction design method of an irregular titanium-containing electrode, and belongs to the technical field of electrochemical metallurgy. The method is realized based on an in-situ detection device of high-temperature electrochemistry. The in-situ detection device comprises an X-ray source, an X-ray fluorescent screen, an aluminum-based alloy protective shell, a heating device, a rotary base, a quartz crucible, a crucible sealing cover with a hole and a vacuum pump. The implementation method comprises the following steps: adopting a 4D visualization method to realize real-time in-situ observation of spatial dissolution and deposition morphology change of the irregular titanium-containing electrode at any time, carrying out three-dimensional reconstruction on a CT image to realize numerical modeling of a real structure of the electrode, and establishing correlation between electrode morphology evolution and electrochemical parameters according to a numerical modeling result, so as to realize real-time in-situ observation of the titanium-containing electrode. According to the association, on the basis of non-uniform distribution of the overpotential in different spatial positions of the irregular titanium-containing electrode, a coaxial cathode matched with the irregular anode is designed, so that the non-uniform distribution of the overpotential is reduced, and stable electrochemical extraction is realized.

The invention provides an aqueous cadmium ion-vanadium dioxide battery as well as a preparation method and application thereof, and relates to the field of ocean energy storage. The battery comprises a negative electrode, a positive electrode, a diaphragm and an aqueous electrolyte, the negative electrode is metal cadmium or cadmium-based alloy; the active material of the positive electrode is metastable monoclinic phase vanadium dioxide; the diaphragm is a glass fiber diaphragm; the aqueous electrolyte is an aqueous solution containing cadmium salt; the total concentration of the cadmium salt in the aqueous electrolyte is 1-4 mol / L. The aqueous vanadium dioxide-cadmium metal secondary battery disclosed by the invention has the advantages of safe aqueous electrolyte system, high rate capability, ultra-long cycle life and the like, and has remarkable advantages when being applied to ocean energy storage.

This invention discloses an aluminum-containing heavy water-based electrolyte, its preparation method, and its applications. The electrolyte comprises a solvent and a solute. The solvent includes heavy water, a deuterated solvent, and a low-barrier hydrogen bond reconstructing agent. The solute comprises a main aluminum salt and an auxiliary monovalent metal salt. This electrolyte can construct low-barrier hydrogen bonds in solution by controlling the solvent composition, significantly reducing the activity of water in the solution, improving the electrochemical stability of the solution, and suppressing side reactions. Simultaneously, it improves the electrochemical reaction behavior of aluminum in the solution and at the electrolyte / electrode interface, which is beneficial for improving the electrochemical deposition efficiency of aluminum in aqueous solution.