59results about How to "Lower open circuit voltage" patented technology

The present invention relates to a polymer electrolyte, a lithium secondary battery using the same, and a method for manufacturing the lithium secondary battery, wherein: an electrode assembly is formed by using a porous nanofiber web as an electrolyte matrix; an organic electrolyte having a mixture of a gel polymer-forming monomer and a polymerization initiator is injected, and a gel polymer electrolyte is formed by polymerization; and the porous nanofiber web is maintained in a web form such that stability can be increased by preventing a short circuit between a cathode and an anode. The polymer electrolyte, according to the present invention, comprises: the porous nanofiber web which is provided with a plurality of nanofibers; and a gel polymer portion which is impregnated into the porous nanofiber web, wherein the gel polymer portion is formed by polymerizing the gel polymer-forming monomer after a non-aqueous organic solvent, a solute of lithium salt, and the organic electrolyte having the gel polymer-forming monomer and the polymerization initiator have been impregnated into the porous nanofiber web.

An anode of a lithium battery includes a composite film, the composite film comprising a carbon nanotube film structure and a plurality of nanoscale tin oxide particles dispersed therein. A method for fabricating an anode of a lithium battery, the method includes the steps of: (a) providing an array of carbon nanotubes; (b) pulling out, by using a tool, at least two carbon nanotube films from the array of carbon nanotubes to form a carbon nanotube film structure; and (c) dispersing a plurality of nanoscale tin oxide particles in the carbon nanotube film structure to form a composite film, and thereby, achieving the anode of the lithium battery.

The invention relates to a method for preparing a wide bandgap nanometer cadmium sulfide thin film, which comprises the following steps that: indium tin oxide (ITO) glass using as substrates is placed in a reaction container after organic solvent soaking, ultrasonic cleaning and drying, and oxidbillity additives are added into reaction solution; in the reaction solution preparation stage, cadmiumsalt and the same acid radical ammonium salt are added into the container, de-ionized water is then added, when the temperature is heated to 40 to 70 DEG C, the proper amount of weak base aqueous solution (ammonia solution) is added for producing cadmium complex compounds, and the reaction solution in the first step is formed; and the weak base solution is added, simultaneously, the oxidbillity additives are added, the additives are organic peroxide (ROOH), organic peroxyacetic acid (RCOOOH) and 2 percent to 30 percent of oxyful, and the addition quantity of the oxidbillity additives is 1 percent to 10 percent of the mol number of the cadmium salt. At the time, thiourea is then added, the light transmittance and the energy gap of the wide bandgap nanometer cadmium sulfide thin film are obviously improved, and window materials of copper indium gallium selenium batteries or cadmium telluride batteries can be more favorably manufactured.

The invention discloses a lithium ion battery. A liquid electrolyte is filled in apertures of positive and negative pole active material layers of the lithium ion battery. A gel state electrolyte is filled in apertures of a separation film. The porosity pr of the separation film is great than or equal to 50% and is less than or equal to 78%. The elastic modulus of the gel state electrolyte is greater than that of a common separation film material. When pole pieces swell in lithium ion battery charging, the gel state electrolyte is easy to be compressed so that a space needed by pole piece thickness increase is obtained, and thus thickness increase of the whole lithium ion battery is reduced in lithium ion battery charging. In addition, the lithium ion battery provided by the invention has good short circuit safety and good electrochemical properties.