9results about How to "Increased nickel content" patented technology

The invention provides a nickel-rich multi-element positive electrode material and a preparation method and application thereof, the nickel-rich multi-element positive electrode material comprises a transition metal element, the transition metal element comprises a nickel element, and the molar content of the nickel element in the transition metal element is greater than or equal to 60%; by mass, the residual alkali content of the nickel-rich multi-element positive electrode material is less than or equal to 3%, and the residual alkali content is the sum of the content of lithium carbonate and the content of lithium carbonate converted from the content of lithium hydroxide. The residual alkali content of the nickel-rich multi-element positive electrode material can be reduced, and the battery performance can be improved.

The invention relates to an impurity removal method for a hydrochloric acid leaching solution containing magnesium minerals, in particular to a method for removing nickel from the hydrochloric acid leaching solution containing the magnesium minerals under high magnesium concentration. According to the method for removing the nickel impurities through the coprecipitation method when the magnesium concentration is high (larger than 50 g / L), the nickel removal effect is good, the nickel slag grade is high, the magnesium loss is small, and the nickel impurities in the magnesium chloride salt solution are low. The high magnesium concentration is that the magnesium concentration is greater than 50g / L, the method is a co-precipitation method, and a neutralizer and an iron inducer are respectively added into the leachate, so that iron ions and nickel ions are subjected to co-precipitation reaction. The method has the following advantages: (1) the iron inducer is added, so that impurities such as nickel can be effectively removed when the concentration of magnesium ions is relatively high; extra water addition for dilution is not needed, and the current production scale is not influenced. And (2) the nickel slag obtained by impurity removal is high in nickel content and high in economic value. And (3) the iron inducer is low in price.

The invention provides a production process of low-nickel molten iron added with medium-nickel ore. The production process comprises a sintering process, raw materials used in the sintering procedure comprise low-aluminum laterite-nickel ore, medium nickel ore and oxide scale. The Ni content and the TFe content of the medium nickel ore are 1.2-1.6% and 28-45% respectively, the Ni content of the medium nickel ore is higher than that of the low-aluminum laterite-nickel ore, the TFe content of the medium nickel ore is lower than that of the low-aluminum laterite-nickel ore, and the TFe content difference value of the medium nickel ore and the low-aluminum laterite-nickel ore is larger than the Ni content difference value; the total adding proportion of the low-aluminum laterite-nickel ore and the medium-nickel ore is limited in a way that the content of Ni in the sintered ore prepared after sintering is 0.8-0.85%; the iron oxide scale is a TFe supplement, and the addition amount of the iron oxide scale is limited by 48-50% of the TFe content in the sintered ore. According to the method, the low-nickel molten iron is produced by matching the laterite-nickel ore with the medium-nickel ore, so that the production cost of the low-nickel molten iron is reduced on the premise of ensuring the quality of the low-nickel molten iron.

According to the composite plating layer electroplating process method, a plating solution comprises, by molar mass, 50%-80% of sodium hydroxide, 2%-3% of ZnO, 3%-7% of nickel sulfate, 2%-9% of triethanolamine, 0.4%-3% of tetraethylenepentamine, 1%-4% of sodium potassium tartrate tetrahydrate, 0.1%-1% of EDTA, 2%-7% of nano silicon dioxide, 0.6%-3% of nano titanium oxide, 12 mL / L of a primary brightener and 12 mL / L of a secondary brightener. By adding the nano silicon oxide and the titanium oxide, a multifunctional composite coating with enhanced surface hardness, self-lubrication, wear resistance and corrosion resistance can be produced, due to the nano size effect, the microstructure of the coating is refined, a finer grain structure is obtained, the compactness of the composite coating is improved, and the corrosion resistance is greatly improved.

The invention relates to the technical field of intermediate alloys, in particular to a silver-nickel intermediate alloy and a preparation method and application thereof. The content of Ni in the silver-nickel intermediate alloy is 1%-20%, the content of O is smaller than 30 ppm, the content of N is smaller than 10 ppm, the content of H is smaller than 8 ppm, and the nickel content deviation is smaller than or equal to 0.05%. The preparation method comprises the following steps: melting a first silver-nickel alloy with low nickel content to prepare alloy liquid; cooling to obtain semi-solid alloy liquid, adding nickel particles, stirring, and cooling to obtain a cast ingot; and forging to obtain an intermediate alloy blank, and then processing the intermediate alloy blank into a silver-nickel intermediate alloy wire or alloy foil. The silver-nickel intermediate alloy prepared through the method is high in nickel content, good in nickel distribution uniformity, high in cleanliness and good in mechanical property; the technical problem that the high-nickel-content silver-nickel intermediate alloy cannot be obtained through a conventional method is solved, and the defects that the silver-nickel intermediate alloy obtained through a powder metallurgy method is high in impurity content and poor in mechanical property are overcome.

The invention relates to the technical field of brazing materials, in particular to silver brazing filler metal and a preparation method thereof. The brazing filler metal of the silver brazing filler metal is in a foil shape containing a plurality of nickel layers or a strip shape containing a plurality of nickel cores; the foil-shaped silver solder comprises a plurality of nickel layers and a plurality of silver alloy layers, the nickel layers and the silver alloy layers are alternately arranged, and the outermost layer is the silver alloy layer; the strip-shaped silver brazing filler metal comprises a plurality of nickel cores and a silver alloy part wrapping the outer sides of the nickel cores. A plurality of nickel layers or a plurality of nickel cores are fixed in a mold cavity at intervals, a multi-layer plate-shaped or multi-nickel-core columnar cast ingot is obtained after the remaining brazing filler metal liquid is cast and demolded, foil-shaped silver brazing filler metal or strip-shaped silver brazing filler metal with the high nickel content can be obtained through a conventional machining mode, the nickel content can reach 20 wt% or above, and the nickel content can reach 20 wt% or above. The problem that the current high-nickel-silver brazing filler metal is difficult to process due to high brittleness is solved; and the silver solder provided by the invention is high in cleanliness, and the shear strength of a soldered joint can be remarkably improved.

The invention discloses a nickel-plated carbon tank valve element which comprises the following components: 80-90% of a metal piece; 10-15% of a rubber buffer part; 0.1%-0.5% of a special adhesive; wherein a proper amount of special tackifier is added into the rubber. According to the invention, the rubber buffer part is made of high-performance fluorosilicone rubber, and a proper amount of special reinforcing material is added. Common fluorosilicone rubber is poor in tensile property, the cycle motion service life is affected, and the tensile property is greatly improved by adding a proper amount of special reinforcing material. And the high and low temperature performance, the tensile performance, the impact fatigue resistance and the permanent deformation performance of the material are improved on the whole. The service life of circulating motion is prolonged, and noise is reduced.

The application relates to the technical field of lithium ion batteries, in particular to a high-entropy high-nickel cobalt-free precursor, a high-entropy high-nickel cobalt-free single-crystal positive electrode material and a preparation method thereof and a lithium ion battery. The high-entropy high-nickel cobalt-free precursor comprises a core layer and a high-entropy doped shell layer coated on at least part of the surface of the core layer; the core layer comprises a first nickel-manganese hydroxide; the high-entropy doped shell layer comprises a high-entropy doped second nickel-manganese hydroxide; and the doped elements in the high-entropy doped second nickel-manganese hydroxide include titanium, magnesium, aluminum, zirconium and molybdenum. The high-entropy high-nickel cobalt-free precursor provided by the application is coated with a high-entropy doped shell layer containing titanium, magnesium, aluminum, zirconium and molybdenum on the surface of the core layer containing the first nickel-manganese hydroxide, which is beneficial to reducing the exposure degree of {010} active crystal faces in the precursor, promoting the preferred growth of the positive electrode material along the (003) plane, and further improving the electrochemical performance and cycle stability of the high-entropy high-nickel cobalt-free single-crystal positive electrode material.

The application discloses a nickel-iron powder and a preparation method and application thereof, and relates to the technical field of atomized nickel-iron powder. The nickel-iron powder provided by the application satisfies the variance S of the mass ratio of iron to nickel 2 The nickel-iron elements are in a non-uniform state, the content of nickel in a solution can be quickly increased during subsequent wet acid leaching, and downstream hydrometallurgy is facilitated.