5results about How to "Avoid chemical corrosion" patented technology

The embodiment of the application provides a wafer horizontal cleaning device, which comprises a clamping disc, a power assembly and a back spraying assembly. The clamping disc is used for horizontally clamping a wafer, and a cleaning hole is arranged in a central region of the clamping disc. The power assembly is arranged below the clamping disc, an end of an output shaft of the power assembly penetrates the cleaning hole, the output shaft is a hollow pipe and is in communication with the cleaning hole. The back spraying assembly is arranged in the output shaft, the back spraying assembly sprays cleaning liquid towards a back central region of the wafer, a first gap is formed between an outer circumferential surface of the back spraying assembly and an inner wall surface of the output shaft, the first gap is in communication with the cleaning hole, and waste liquid is discharged through the first gap. According to the wafer horizontal cleaning device, the waste liquid can be discharged through the first gap in time, the waste liquid can be effectively prevented from corroding other structural members, and the waste liquid can be prevented from being accumulated to cause liquid beads to be condensed on the back of the wafer, thereby affecting the process effect.

The invention discloses a modified PVDF (Polyvinylidene Fluoride) binder for a sulfide all-solid-state battery as well as a preparation method and application of the modified PVDF binder. The preparation method of the modified PVDF binder comprises the following steps: dissolving polyvinylidene fluoride, a polymerizable monomer and a chain transfer agent in N, N-dimethylformamide, and carrying out a modification reaction to obtain a block copolymer; precipitating and separating out in methanol, washing, and drying in vacuum to obtain the white powdery modified PVDF binder. The invention also discloses the modified PVDF binder prepared by the method, a composite positive electrode with a gradient structure, and an all-solid-state battery comprising the composite positive electrode. The prepared modified PVDF has good solubility in a non-polar solvent, and erosion of the polar solvent to sulfide electrolyte is avoided. A continuous gradient structure from an electron enrichment area to an ion enrichment area is constructed in the pole piece, the prepared composite positive pole piece has excellent electron and ion conduction at the same time, and the problems of interface transmission bottleneck and solvent compatibility in a sulfide system are effectively solved.

The invention belongs to the technical field of sodium-ion batteries, and particularly relates to a solid particle volatilization pore-forming type sodium-electricity dry-method positive plate as well as a preparation method and application thereof. The positive plate is prepared by compounding positive electrode diaphragms prepared from a positive electrode material by a dry method on two sides of a current collector, the positive electrode material comprises a positive electrode active material, a conductive agent, a binder and a pore-forming agent, the pore-forming agent is solid particle hexachloroethane, and the D50 particle size of the solid particle hexachloroethane is less than or equal to 0.3 mu m. And the solid pore-forming agent is added into the positive electrode and forms tiny pores after high-temperature sublimation, so that the porosity of the pole piece is improved, the electrolyte retention capacity is increased, the concentration polarization is reduced, and the rate capability is improved under high surface density, thereby improving the energy density of the sodium ion battery.

The utility model discloses an anti-seismic protective corrugated pipe assembly with axial buffer joint structures, which comprises a corrugated pipe main body, external pipelines are arranged on both sides of the corrugated pipe main body, the axial buffer joint structures are arranged between both ends of the corrugated pipe main body and the external pipelines, and a protective structure is arranged outside the corrugated pipe main body. The axial buffering connector structure comprises a first connecting ring, a second connecting ring, a buffering spring and a limiting rod, the first connecting ring is fixedly connected with one end of the corrugated pipe body, the second connecting ring is fixedly connected with an external pipeline, and the two ends of the buffering spring are fixedly connected with the first connecting ring and the second connecting ring respectively. And one end of the limiting rod is fixedly connected with the first connecting ring, and the other end of the limiting rod penetrates through the second connecting ring and extends to the outside, so that the anti-seismic property of the corrugated pipe assembly can be improved, and joint damage caused by axial stress can be effectively avoided.

The scheme discloses an anti-corrosion sleeve for a photovoltaic frame bolt in the technical field of photovoltaic accessories, the anti-corrosion sleeve comprises a fixed cylinder with an opening at one end, the inner wall of the opening end of the fixed cylinder is provided with an internal thread matched with a screw of the photovoltaic frame bolt for use, and the outer wall of the fixed cylinder is sequentially coated with a heat insulation layer and an anti-aging layer from inside to outside. The anti-corrosion sleeve can effectively prevent or delay corrosion of the exposed part of the screw of the bolt.