2results about How to "Electrochemical stability" patented technology

The application discloses a preparation method of a titanium carbide doped polymer solid electrolyte, which can effectively reduce the crystallinity of PEO, enhance the ionic conductivity of the polymer solid electrolyte and widen the electrochemical window by grafting PCL (polycaprolactone) on the surface of a two-dimensional material titanium carbide (MXene) and blending the PCL with a PEO (polyethylene oxide) blend.The steps adopted by the application are as follows: firstly, PCL is grafted on the surface of MXene through a one-pot method; then, the grafted material is mixed with PEO and LiTFSI (lithium bis(trifluoromethanesulfonyl)imide) in a certain proportion, is subjected to ultrasonic oscillation and is uniformly mixed by heating; finally, the solution is poured on a glass culture medium, the solvent is volatilized at room temperature, the solvent is removed by heating, and a solid polymer electrolyte film is obtained.The polymer solid electrolyte film prepared by the method of the application has good mechanical properties, high ionic conductivity, a wide electrochemical stability window, stable charge and discharge processes of an assembled battery and excellent cycle performance.

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.