48results about How to "Improve fade resistance" patented technology

The invention discloses a preparation method of a positive composite material of a graphene-lithium battery. The preparation method comprises the following steps of (1) performing coprecipitation-loading on graphene, a graphene precursor, graphene powder or graphene dispersion and a positive material of a lithium battery, namely adding the graphene, the graphene precursor, the graphene powder or the graphene dispersion and the positive material of the lithium battery in the mass ratio of 1:8 to 1:100 into a solvent to keep the concentration at 1-120 g / L, then adding auxiliaries which is 1-10 mass percent of the grapheme, adjusting the hydrogen ion concentration to be 1.0*10<-5> to 1.0*10<2> mol / L through a pH value adjustment agent, and mixing at the temperature of 10-80 DEG C for 1-96 hours to obtain a loaded product; (2) performing centrifugal separation on the loaded product, wherein one product is a solid sample; (3) roasting the separated solid sample at the temperature of 400-700 DEG C for 0.5-4 hours, and performing activation to obtain the positive composite material of the graphene-lithium battery. The preparation method disclosed by the invention has the beneficial effects that the volume specific capacity and the attenuation resistance are improved, the cycle life is long, and the capacity stability is high.

The invention discloses a novel carbon-carbon nanotube lithium ion battery cathode material and a preparation method thereof, and belongs to the technical field of lithium ion batteries and the nanometer technology field. The novel carbon-carbon nanotube lithium ion battery cathode material is characterized in that the novel carbon-carbon nanotube lithium ion battery cathode material is formed by spherical graphite and a cladding material wrapped on the surface of the spherical graphite, and the cladding material accounts for 8-12% of the total weight of the spherical graphite and the cladding material; and the cladding material is prepared through mixing carbon nanotubes with organic carbon powder, and the weight ratio of the carbon nanotubes to the organic carbon powder is 3:7. The novel carbon-carbon nanotube lithium ion battery cathode material prepared in the invention can well solve the carbon nanotube agglomeration phenomenon through multi-time grading diffusion, the cladding material is wrapped on the surface of the spherical graphite, and the carbon nanotubes generate a pompon-like grid structure on the surface of the spherical graphite, so the surface strength is enhanced, the conductive performance and the anti-damping performance are substantially improved, and the first discharge capacity is substantially improved.

The invention discloses a printing and dyeing auxiliary, and relates to the technical field of spinning dyeing. The printing and dyeing auxiliary comprises, by weight, 10-15 parts of guar gum, 7-9.5 parts of poly alkyl acrylate, 15-20 parts of sodium carboxymethylcellulose, 5-8 parts of octadecyl dimethyl benzyl ammonium chloride, 2-3 parts of tannin and 10-15 parts of barium chloride. A preparing method comprises the steps that the raw materials are weighed according to the weight part, the poly alkyl acrylate, the sodium carboxymethylcellulose and the octadecyl dimethyl benzyl ammonium chloride are added into a reaction kettle to be heated and stirred until reaction is thorough, and cooling is carried out; the tannin and the barium chloride are added, stirred and heated, the guar gum is added, and stirring is even. The printing and dyeing auxiliary has the advantages of being high color fastness, good in color protecting performance and fading proof.

The invention discloses a monocrystal-like solar battery texturing process which comprises the following steps: placing a silicon wafer into a HNO3 and HF mixed acid solution for corrosion; taking out the treated silicon wafer from the mixed acid solution when the corrosion depth of the silicon wafer is up to 2-5 micrometers; carrying out water washing and drying treatment on the silicon wafer after acid corrosion; placing the dried silicon wafer into KOH or NaOH aqueous alkali with a single crystal for corrosion; taking out the silicon wafer from the aqueous alkali when the corrosion depth of the silicon wafer is up to 2-5 micrometers; and carrying out water washing and drying treatment on the silicon wafer after alkali corrosion. According to the process, the texturing treatment is carried out on the silicon wafer, a battery piece which is manufactured by the silicon wafer treated by using the process is small in reflectivity difference rate among crystalline grains with different sizes, and has better anti-damping performances.

The invention provides compound cathode slurry of graphene high-power lithium batteries, relates to the technical field of cathode slurry of lithium batteries and aims to solve the technical problems that cathode slurry used in the prior art causes reduced energy storage capacity and poor cycle performance and stability of the lithium batteries, as a result, the lithium batteries easily heat and are short in service life and low in utilization rate during usage. Thus, the invention provides the compound cathode slurry of graphene high-power lithium batteries. Compared with traditional cathode slurry for the lithium batteries, the prepared compound cathode slurry has the battery capacity reduced from 195.256 mAh / g to 193.658 mAh / g and the capacity retention rate up to 99.18% under the conditions that the temperature is 35 DGE C and 1C charge and 6C discharge are circulated 500 times, the discharge specific capacity and attenuation resistance are improved, and the high cycle life and high capacity stability are realized.

The invention discloses a mine microseism wave detector installed in a deep hole. The mine microseism wave detector installed in the deep hole comprises a wave detector sensing unit, a vibration testing unit, a variable gain and controllable filtering module, an azimuthal angle and dip angle measurement module and a core control module with data collection and communication functions. The wave detector can achieve automatic recording of related information, lowers the complexity of artificial operation, avoids introducing more artificial measurement errors, achieves self-measurement of the azimuthal angle and the dip angle, reduces the amount of the related information recorded manually, lightens the workload of manual recording and the probability of wrong recording, and guarantees normal work. A work state self-detection function of the wave detector is added, maintenance difficulty and complexity are lowered, the utilization rate is improved, variable gains and controllable filtering are increased, the grain range and the filtering frequency band are adjustable, the signal-to-noise ratio and the anti-attenuation capacity of a single source are improved, and the wave detector sensing unit is favorable for improving the signal-to-noise ratio of the wave detector array.

The invention discloses a cable anti-theft device, and belongs to the technical field of anti-theft of street lamp cables. The anti-theft device comprises a detecting host and a terminal node, wherein the detecting host comprises a control unit, a current pulse sending unit and a current loop signal resolving unit, and the control unit controls the current pulse sending unit to send current pulse signals to the terminal node; the terminal node resolves the current pulse signals and sends response current pulse signals to the current loop signal resolving unit of the detecting host according to the resolution result, and the current loop signal resolving unit of the detecting host resolves the response current pulse signals and transmits the resolution result to the control unit; the control unit calculates the terminal node address information according to the resolution result and judges whether the terminal node is lost or not according to the address information and uploads the lost information to a street lamp manager when the terminal node is lost. The current is used as a carrier to transmit data to ensure the quality of communication and achieve longer-distance signal transmission, so that the cable anti-theft device has the advantages of accurate detection and efficient operation.

The invention discloses a light-emitting diode (LED) module based on a high-voltage constant current technology. The LED module comprises a constant current module, a high-voltage direct current stabilized power source which is connected with an input end of the constant current module and an LED lamp set which is connected with an output end of the constant current module, wherein the constant current module comprises an injection outer shell and a constant current circuit board which is totally coated by the injection outer shell. The constant current circuit board comprises a printed circuit board (PCB) and a constant current circuit which is installed on the PCB. The constant current circuit comprises two LC1912 triodes and a fast-recovery voltage stabilizing diode SS14, wherein the two LC1912 triodes are connected in parallel, and the fast-recovery voltage stabilizing diode SS14 is connected with a parallel branch of the two LC1912 triodes in series. A collector electrode of each LC1912 triode is connected with a resistor. An input end of the constant current circuit is connected with the high-voltage direct current stabilized power source, and the output end of the constant current circuit is connected with the LED lamp set. The LED module based on the high-voltage constant current technology is capable of achieving uniform luminescence of all LED lamps and improving whole performance of the LED module, and has high practical value and promotional value.