2results about How to "Improved physical contact" patented technology

This invention relates to the field of all-solid-state secondary battery technology and discloses a high-performance all-solid-state secondary battery equipped with a stabilized positive electrode, comprising a positive electrode, a negative electrode layer, and a solid electrolyte layer. The positive electrode is manufactured by coating and drying a slurry containing 80%-88% positive electrode active material, 10%-16% sulfide solid electrolyte, 1%-2% conductive agent, and 1%-2% binder, followed by a heat-pressurization treatment at 100℃-250℃ and 10MPa-100MPa. This invention constructs a dense interface stabilization layer in situ between the positive electrode active material and the sulfide electrolyte by applying a thermo-pressure coupling treatment to the positive electrode precursor. This stabilization layer improves the physical contact between the solid and solid interfaces and reduces interfacial impedance. Simultaneously, this stabilization layer acts as a physical barrier, inhibiting the oxidative decomposition of the electrolyte under high voltage, slowing capacity decay, and improving the battery's cycle life and structural stability.

The invention discloses a titanate self-assembly monomolecular passivation layer and a preparation method and application thereof, and belongs to the technical field of photovoltaic cells. A di (triethanolamine) titanium diisopropyl ester self-assembly molecular layer is introduced to the surface of a nickel oxide film, and a stable molecular-level buffer interface is constructed between nickel oxide and a perovskite light absorption layer. Titanate molecules can be subjected to coordination or condensation reaction with hydroxyl on the surface of nickel oxide, and interact with unsaturated nickel sites through a polydentate triethanolamine structure, so that surface hydroxyl defects and chemical activity of high-valence nickel ions are inhibited at the same time, and interface defect state density and non-radiative recombination loss are remarkably reduced. The passivation layer can be formed under a mild condition, the process is simple and is highly compatible with the preparation process of a trans-type device, and the photoelectric conversion efficiency and the long-term operation stability of the trans-type perovskite solar cell can be synchronously improved on the premise that the structural complexity of the device is not increased.