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109results about How to "Reduce the amount of coating" patented technology

Water-based high-viscosity glued diaphragm, preparation method thereof, and application of diaphragm in battery

The invention relates to a water-based high-viscosity glued diaphragm, a preparation method thereof and an application of the diaphragm in a battery. The water-based high-viscosity glued diaphragm comprises a base membrane, and a positive polymer layer and a negative polymer layer which are respectively arranged at two sides of the base membrane, wherein a positive ceramic layer is arranged between the base membrane and the positive polymer layer, and/or a negative ceramic layer is arranged between the base membrane and the negative polymer layer; a binder in the positive polymer layer and a battery positive electrode piece is the same type of binder, and a binder in the negative polymer layer and a battery negative electrode piece is the same type of binder. The diaphragm disclosed by theinvention has the characteristics of small coating amount of coatings on two sides, light and thin coatings, high cohesiveness and the like, so the shaping effect of a battery cell is optimal, and module boxing is facilitated; meanwhile, a module limiting effect is achieved. Moreover, the risk of hole blockage of the diaphragm is low, so the internal resistance of the battery cell is stable and controllable, the lithium precipitation risk is reduced, and the cycle life and safety performance of the battery cell are ensured.
Owner:HUBEI JINQUAN NEW MATERIALS CO LTD

Positive electrode sheet capable of discharging at high rate, and lithium ion battery comprising positive electrode sheet

The invention provides a positive electrode sheet capable of realizing high-rate discharge, and a lithium ion battery comprising the positive electrode sheet. According to the invention, a first positive electrode active material layer is prepared from a first positive electrode active material comprising a polycrystalline nickel-containing ternary material, and a second positive electrode activematerial layer is prepared from a second positive electrode active material comprising a monocrystalline or monocrystalline-like nickel-containing ternary material; by arranging the first positive electrode active material layer and the second positive electrode active material layer, the coating amount can be reduced, and the rate capability of a lithium ion battery can be improved, or the energydensity of the lithium ion battery can be increased while the rate capability of the lithium ion battery is ensured; and by utilizing the characteristics of good stability of the second positive electrode active substance and relatively small contact area with an electrolytic solution, the side reaction in the high-rate discharge process can be reduced, the risk of gas production failure is reduced, and the quick discharge performance of the system can also be ensured.
Owner:ZHUHAI COSMX BATTERY CO LTD

Coated titanium anode and spraying pyrolysis preparation method thereof

ActiveCN107779847AOvercome the technical flaw of short lifespanLow costLiquid/solution decomposition chemical coatingSlurryMaterials science
The invention belongs to the field of preparing electrodes for electrochemical engineering, and more specifically, relates to a coated titanium anode and a spraying pyrolysis preparation method thereof. The method includes following steps: (1), coating the surface of a titanium plate after being pretreated with an antioxidation layer; (2), controlling temperature of the titanium plate to 250-300 DEG C, and atomizing and spraying electrode preparation raw material slurry onto the surface of the antioxidation layer of the titanium plate; (3), sintering the titanium plate at high temperature to obtain the coated titanium anode. The coated titanium anode is prepared by combining spraying technology with step-by-step thermal treatment, so that the technical defect of short service life of electrodes caused by the fact that coatings are prone to dry-cracking when being baked at high temperature in a brush-coating method in the prior art is overcome ingeniously; quick and accurate preparationof the coated titanium anode is realized, preparation cost is low, and product quality is controllable. On the premise that performance is ensured, coating amount of precious metal is lowered greatly, cost of the coated titanium plate is lowered remarkably, and expansion and parity of applying the coated titanium anode are facilitated.
Owner:SHANGHAI TECHASE ENVIRONMENT PROTECTION +1

Electrode and method for manufacturing same

The invention relates to an electrode and a method for manufacturing the same. The electrode is manufactured by mixing slurry, coating, drying, rolling and cutting to shape, and includes a current collector and an electrode material layer coated on the surface of the current collector. The surface of the electrode material layer is arranged in a peak-valley shape after roughening treatment, and the roughening treatment step of electrode material layer is arranged after any step of drying, rolling or cutting to shape. According to the invention, the specific surface area of the electrode surface is increased by changing the surface morphology of the electrode, so that the electrode has a high specific surface area, the coating amount of an electrode active material can not be reduced, and the absorption rate and absorption amount of electrolyte by the electrode, thereby breaking the rule of a trade-off between rate and capacity and enabling the lithium battery to have both a high capacity density and improved rate performance, so that the lithium battery has high-rate charge and discharge characteristics; and a high coating amount of the electrode active material can better control stability of the prepared lithium battery, without foil leakage risks, thereby greatly reducing the security risks of lithium batteries.
Owner:SHENZHEN BAK BATTERY CO LTD +1

Preparation method of waterborne bass with pressure change resistance and high resilience property

The invention relates to a preparation method of a waterborne bass with pressure change resistance and high resilience property. The method comprises steps as follows: (1) preparation of slurry: 1) preparation of waterborne bass foaming slurry: 10-30 parts of tap water, 2-5 parts of a waterborne dispersant, 1-3 parts of a waterborne crosslinking agent, 3-6 parts of a waterborne stabilizer, 3-6 parts of a waterborne foaming agent, 2-5 parts of a medium-temperature microsphere foaming agent, 20-40 parts of filling powder and 1-2 parts of a thickener are sequentially added to 200-300 parts of waterborne polyurethane resin, the mixture is stirred and mechanically foamed, and the waterborne bass foaming slurry with uniform pores is prepared; 2) preparation of a curing liquid: 85-95 parts of tap water are added to 6-14 parts of a demulsifying curing agent and stirred uniformly, and the curing liquid is obtained; (2) preparation of the waterborne bass: the waterborne bass foaming slurry is uniformly applied to knitted or woven fabric and sequentially subjected to water washing and press drying after being solidified through the curing liquid and finally enters a five-zone stepped heating oven to be foamed and dried, and the waterborne bass is obtained. The waterborne bass is low in cost, safe, environment-friendly and high in pressure change resistance and air permeability.
Owner:HEFEI KETIAN WATERBORNE TECH CO LTD

Lithium ion battery positive electrode plate and lithium ion battery negative electrode plate, making methods thereof, roll core, and lithium ion battery

The invention belongs to the technical field of lithium ion batteries, and concretely discloses a lithium ion battery positive electrode plate and a lithium ion battery negative electrode plate, making methods thereof, a roll core, and a lithium ion battery. In the lithium ion battery positive electrode plate and the lithium ion battery negative electrode plate, the positive/negative electrode plate comprises a positive/negative electrode current collector layer, a positive/negative electrode light surface material layer and a positive/negative electrode shadow surface material layer; the positive electrode light surface material layer and the positive electrode shadow surface material layer are respectively arranged on two external surfaces of the positive electrode current collector layer; the negative electrode light surface material layer and the negative electrode shadow surface material layer are respectively arranged on two external surfaces of the negative electrode current collector layer; the surface density of the electrode material in the shadow material layer is 30-48% of the surface density of the total electrode material of the corresponding electrode plate; and the surface density of the electrode material in the light material layer is 52-70% of the surface density of the total electrode material of the corresponding electrode plate. The above positive and negative plate structure makes the positive electrode plate closely cooperate with the negative electrode plate in order to effectively increase the compacted density of the positive electrode plate and the negative electrode plate, so the energy density of the finally obtained lithium ion battery is improved by at least 8.5%.
Owner:ZHENGZHOU BAK BATTERY CO LTD +1

Low-air-permeability one-time forming safety air bag and production technology thereof

The invention discloses a low-air-permeability one-time forming safety air bag which comprises double cloth. The edge of the double cloth is continuously bonded together, and a cavity can be formed inthe double cloth. A moistening layer evenly covers the fiber surface of the double cloth, and the moistening layer is manufactured through a moistening layer treatment agent. The moistening layer treatment agent comprises the following components including, by weight, 0.5-10 parts of fatty alcohol and ethylene oxide condensation compounds, 0.5-10 parts of fatty alcohol polyoxyethylene ether, 0.5-10 parts of fatty alcohol glycol ether and 70-97.5 parts of water. Each of the front surface and the back surface of the moistening layer is evenly coated with a coating. The invention further discloses a production technology of the above low-air-permeability one-time forming safety air bag. The low-air-permeability one-time forming safety air bag and the production technology of the above low-air-permeability one-time forming safety air bag have the beneficial effects that on the premise that the same pressure maintaining performance is reached, 23%-31% of the coating amount can be reduced,the use amount of the chemical raw material of organic silica gel is reduced, the cost is saved, and the production process is more environment-friendly.
Owner:HMT XIAMEN NEW TECHN MATERIALS
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