99results about How to "Improve charging performance" patented technology

A toner containing a colorant, a binder resin and a laminar inorganic mineral in which part or all of the ions present between layers are modified by organic ions. The toner can be prepared by a method including dispersing or emulsifying a toner constituent mixture liquid containing the colorant, the binder resin and/or a precursor thereof, and the laminar inorganic mineral, in an aqueous medium. The density of the laminar inorganic mineral measured by XPS for the toner surface before (A) and after(B) mixing and kneading satisfies the following relationship: A>B.

The invention discloses a lithium ion battery capable of being subjected to high-rate charge and discharge and a preparation method thereof. The lithium ion battery capable of being subjected to high-rate charge and discharge comprises a positive pole, a negative pole and a diaphragm, wherein the positive pole comprises the following components in percentage by weight: 80-98% of positive active material, 1-19% of conductive agent and 1-19% of binder; the negative pole comprises the following components in percentage by weight: 80-98% of negative active material, 1-19% of conductive agent and 1-19% of binder; the positive active material includes one or two of Li(NiCoMn)O2 and lithium manganate; the negative active material includes one or two of hard carbon and soft carbon; the conductive agent is one of superconducting carbon black, carbon fiber, crystalline flake graphite and a carbon nanotube; and the binder is one of kynar, butadiene styrene rubber, sodium carboxymethylcellulose and hydroxypropyl/carboxymethyl cellulose. According to the lithium ion battery capable of being subjected to high-rate charge and discharge and the preparation method thereof disclosed by the invention, the lithium ion battery has high-rate charge and discharge characteristics, and is good in charge and discharge characteristics, wide in temperature application range, excellent in low-temperature charge performance, long in cycle life and high in safety.

Disclosed are a porous spherical carbon-coated sodium vanadium phosphate composite positive electrode material and a preparation method thereof. The composite positive electrode material is prepared by the steps of (1) dissolving a vanadium source compound and a reducing agent into water, performing heating and then adding a phosphorus source compound and a sodium source compound to obtain a mixedsolution; (2) adding an organic solvent, wherein the polarity of the organic solvent is greater than that of water, and putting into a sealed container to be subjected to a heating reaction, and next, performing cooling, centrifuging, washing, depositing and drying to obtain precursor powder; and (3) performing mixing with glucose, and performing sintering and cooling on the mixture in protectiveatmosphere. The positive electrode material is spherical and has the primary granular diameter of 50-200nm; when the composite positive electrode material is assembled into a battery, the initial discharge capacity per gram at 0.2C and 10C within a voltage range of 2.0-3.8V can reach 110 mAh.g<-1> and 95 mAh.g<-1> respectively; the capacity retention rate can reach 99.47% at 10C rate after 100 cycles; and the method is simple and low in reaction temperature.

A charging member, one embodiment of which includes a conductive support; a conductive elastomer layer stacked on the conductive support; and a conductive resin layer stacked on the conductive elastomer layer, wherein the conductive resin layer includes: a matrix material; and a plurality of particles dispersed in the matrix material, wherein the particles include first particles, and when a thickness of a portion formed of the matrix material alone of the conductive resin layer is referred to as A [μm], an average particle size of the first particles is referred to as B₁ [μm], and an interparticle distance of the particles is referred to as Sm [μm], then A is in a range of 1.0 μm to 7.0 μm, B₁/A is in a range of 5.0 to 30.0, and Sm is in a range of 50 μm to 400 μm.

The invention discloses a method for preparing a natural polyelectrolyte nanofiltration membrane and belongs to the technical field of preparation of membrane materials. According to the method disclosed by the invention, a quaternary ammonium cation cellulose ether and a quaternized chitosan blend form an ultra-thin separation layer material, polyvinyl alcohol serves as a casting solution additive, and polysulfone serves as a supporting layer material; two kinds of natural polyelectrolyte serve as a membrane material, and a cross-linking agent is added, so that the two polymers are cross-linked to form a spatial semi-interpenetrating network structure, the polymer networks are mutually tangled, and therefore, the membrane structure stability is enhanced. Meanwhile, the natural polyelectrolyte charged nanofiltration membrane has an antibacterial group capable of inhibiting and killing bacterium components in water, while the membrane structure is provided with many hydrophilic groups,and the hydrophilic property on the membrane surface is excellent. Meanwhile, the raw materials are readily available, the cellulose belongs to renewable resources, the chitosan belongs to natural polysaccharides, any risk of environmental pollution is avoided, and the preparation method is convenient and practical.

To provide a magnetic toner which: enables a stable image density to be obtained irrespective of a use environment; and exhibits excellent low-temperature fixability, little image deterioration upon fixation, high coloring power, and a reduced toner consumption. The present invention relates to a magnetic toner containing at least: a binder resin; and a magnetic body. The binder resin contains a polyester unit. The toner has a weight average particle size of 5.0 to 9.0 μm, a true specific gravity of 1.3 to 1.7 g/cm³, and a saturated magnetization of 20 to 35 Am²/kg in a magnetic field of 796 kA/m. The dielectric loss tangent (tan δ) of the toner satisfies (tan δ_H−tan δ_L)/tan δ_L≦0.20 at 100 kHz.

The invention discloses a charging control method, device and system. The charging control method comprises the following steps that charging current or charging temperature of a terminal charging port is acquired every scheduled time, and the required voltage of charging equipment is acquired according to the charging current or the charging temperature; and charging voltage of the terminal charging port is acquired, and the required voltage is transmitted to the charging equipment when the charging voltage is not equal to the required voltage so that the charging equipment performs voltage regulation. The charging voltage of the charging equipment can be flexibly regulated by the terminal according to the charging state of the terminal so that charging efficiency is enhanced and a better charging performance of the terminal can be maintained.

The invention discloses a method for preparing a carboxymethylcellulose sodium composite-filled polyamide nanofiltration membrane. The method comprises the steps: preparing a carboxymethylcellulose sodium composite by an ionic crosslinking method, adding the carboxymethylcellulose sodium composite into an aqueous phase monomer solution for synthesis of a polyamide membrane, and preparing the carboxymethylcellulose sodium composite-filled polyamide nanofiltration membrane by an interfacial polymerization method. With utilization of good hydrophilicity, charge performance and a unique nano pore structure of the composite, the water permeation flux of the membrane is greatly improved while the high selectivity of the polyamide membrane on an inorganic salt is kept. Under an operating pressure of 0.6 MPa, the nanofiltration membrane has the water flux of 50-65 L.m<-2>.h<-1>, has quite high interception rate on divalent ions and the highest reaching 97%, and has the interception rate on monovalent ions of generally less than 25%. Therefore, the prepared carboxymethylcellulose sodium composite-filled polyamide nanofiltration membrane has high separation selectivity and water permeation flux, and has the advantages of simple and feasible membrane preparation method, low cost, and good industrialized application prospects.

The invention provides a wireless charging system and a wireless charging device thereof. The wireless charging system comprises equipment to be charged and the wireless charging device, the equipment to be charged comprises a target battery and a first communication unit, the target battery supports wireless charging, the wireless charging device comprises a charging unit, a starting control unit and a second communication unit, and the charging unit comprises a power supply, a charging circuit, a discharging circuit and a charging control unit; after the wireless charging device recognizes charging requirements of the equipment to be charged, a target battery charging process comprises a first charging stage, a discharging stage and a second charging stage which are sequential, continuous and circulatory; in the first charging state, the target battery is charged with constant voltage; in the discharging stage, the target battery is discharged with continuously reduced discharging voltage until the voltage is zero; and in the second charging state, the target battery is charged with continuously increased charging voltage until the voltage is constant voltage. The wireless charging system and the wireless charging device thereof can simultaneously meet requirements of convenience of wireless charging, prolongation of endurance time and prolongation of the service life of the battery.

A developing device includes a developer carrying member; a first feeding path in which a developer is to be supplied and fed to the developer carrying member at a position in which the first feeding path opposes the developer carrying member; a second feeding path, communicating with the first feeding path, for forming a circulation path with the first feeding path; a discharge opening for permitting discharge of an excessive developer in the developing device; a first supply opening, located downstream of the first feeding path opposing the developer carrying member with respect to a developer feeding direction and located upstream of the discharge opening with respect to the developer feeding direction, for permitting supply of a first developer containing at least toner; and a second supply opening, located upstream of the first feeding path with respect to the developer feeding direction and located downstream of the discharge opening with respect to the developer feeding direction, for permitting supply of a second developer which has a toner ratio lower than that of the first developer or is consisting only of a carrier.

The invention relates to an amphoteric composite forward osmosis membrane. According to the amphoteric composite forward osmosis membrane, an adopted porous support membrane is a super-hydrophilic polyvinylidene fluoride membrane; a polyamide layer is formed on the porous support membrane, and a zwitterionic layer is formed on the polyamide layer. In the present invention, the zwitterionic layer is formed by amido groups through zwitterionic reaction; through cooperation with the super-hydrophilic characteristic of the polyvinylidene fluoride membrane prepared through water vapor induced phaseseparation, the strong hydration and the charging performance of a catechol derivative modified graphene oxide nano-water channel and the zwitterionic skin layer, the water flux of the composite forward osmosis membrane is greatly improved while a low back-mixing salt flux is kept.

An electrophotographic developer and a process for forming an image are provided in that the fixing can be conducted at a lower temperature than the conventional technique, and that are excellent in the powder storage stability, the anti-blocking property and the image storage stability after fixing without impairing the density, the coloring property and the transparency of the image after fixing, and further have appropriate electric charging property without any problem of fogging or cloud with excellent maintenance property of electric charge. The electrophotographic developer contains a toner for developing an electrostatic image containing a coloring agent and a binder resin containing, as a main component, a crystalline resin having a melting point of about from 60 to 120 DEG C., and a carrier having a resin film containing a nitrogen-containing resin on a surface thereof. The process for forming an image is carried out by using the electrophotographic developer.

The invention provides a method for preparing a compound carbon polymer lead-acid battery. The preparation method comprises preparation of a compound carbon material, compounding with a conducting polymer and preparation of a battery. The prepared compound carbon material is physically mixed with the conducting polymer to obtain a compound carbon polymer composite material. The compound carbon conducting polymer composite material is added into a positive electrode of the lead-acid battery, so that the conductivity of the positive electrode can be effectively improved; the void ratios of positive electrode active substances are increased; and meanwhile, agglomeration of graphene can be blocked, and a carbon material can form a space conductive network structure. The conducting polymer can be taken as a conducting framework in the positive electrode active substances to restrain early argillization of the positive electrode, so that the cycle life is prolonged. The prepared compound carbon conducting polymer lead-acid battery has the characteristics of short forming time, long battery cycle life and high capacity.

Magnetic particles having an average particle size of 10 to 200 mum, comprising:magnetic core particles; anda coating layer formed on each surface of said magnetic core particles, comprising at least one metal alkoxide represented by the general formula (I): wherein R is a C1 to C16 alkyl group; M is Al, Ti, Na,K, Ca, Zn or Fe; and n is an integer of 1 to 4, at least one silane-based coupling agent, and a silicone resin.Such magnetic particles have an excellent durability and a stable charging property.

The invention relates to a power generation device and a charging system. The power generation device is composed of a thermoelectric generating component, a heat radiating component, a heating component, a first heat conductive gasket, a second heat conductive gasket, a first electric energy output unit and a power supply interface. The first heat conductive gasket includes a first surface and a second surface; the first surface is in contact with a heat radiating end of the heat radiating component; and the second surface is in contact with a cold end of the thermoelectric generating component. The second heat conductive gasket includes a third surface and a fourth surface; the third surface and a thermal end of the thermoelectric generating component are in contact; and the fourth surface and a heating end of the heating component are in contact. The first heat conductive gasket and/or the second heat conductive gasket employ/employs flexible materials/ a flexible material that can store energy and has a good uniform heat transferring performance. The first electric energy output unit connected with the thermoelectric generating component is used for outputting the electric energy generated by the thermoelectric generating component and carrying out external power supplying through the power supply interface. According to the technical scheme, uniform heat radiation during the heat conduction process can be guaranteed; a local high temperature phenomenon can be avoided; and the heat conduction efficiency and power generation efficiency can be improved.

Disclosed are a resin-filled ferrite carrier core material for an electrophotographic developer, including a porous ferrite particle having an average compression strength of 100 mN or more and a coefficient of variation of the compression strength of 50% or less, a ferrite carrier obtained by filling a resin in the voids of the ferrite carrier core material, and an electrophotographic developer using the ferrite carrier.

The invention discloses a preparation method of a graphene low-temperature battery. The preparation method is applied to batteries of lithium titanate negative pole systems. An existing rechargeable battery only can be charged to 50-70% the total battery capacity in a low-temperature environment. The preparation method includes the steps that slurry needed for coating a battery positive pole plate is prepared from a lithium manganate positive electrode, a binding agent and a conductive agent; homogenate of slurry needed for coating a battery negative pole plate is prepared from a conductive agent containing conductive graphene slurry; coating of the battery positive pole and the battery negative pole is carried out, and blank foil is reserved on the upper and lower sides of the positive pole and the negative pole; rolling and cutting of the battery positive pole plate and the battery negative pole plate are carried out; battery assembling is carried out; battery formation and aftertreatment are carried out. The preparation method has the advantages that the battery can be charged to 90% the total battery capacity within 6 min in an environment where the temperature is -40 DEG C, and meanwhile the battery has super-high cycle performance and low internal resistance.