46results about How to "Increase electrode capacity" patented technology

The teachings herein are directed at a lithium secondary battery negative electrode active material consisting of a Sn Sb based sulfide that delivers a high electrode capacity density, excellent output characteristics, and excellent cycle life characteristics and also provide a method for manufacturing the lithium secondary battery negative electrode active material, said method being capable of easily manufacturing the high performance lithium secondary battery negative electrode active material at low cost without requiring a high-temperature processing step and special facilities as required in a glass melting method. The negative electrode active material preferably is prepared using a method that includes a step of obtaining a Sn Sb based sulfide precipitate by adding an alkali metal sulfide to a mixed solution of a tin halide and an antimony halide.

The invention discloses biomass porous activated carbon and a preparation method thereof and application of the biomass porous activated carbon as an electrode material of a double electric layer capacitor. After a biomass raw material is pulverized by a high-energy pulverizer, the biomass raw material is placed in a furnace, protective gas is introduced into the furnace, the temperature is raisedto an activation temperature under a protective atmosphere, then activation gas is introduced into the furnace for activation treatment, protective gas is introduced into the furnace again, and the temperature is lowered to a normal temperature under a protective atmosphere to obtain the biomass porous activated carbon. The method maintains an original biological structure and ordered pore structure of wood fiber in the biomass material by high-energy pulverization combined with gas activation treatment, the prepared porous activated carbon has a large specific surface area and a high mass transfer rate and is applied as the electrode material of the electric double layer capacitor, and a capacitor with high energy density and good cycle performance can be obtained; and the porous activated carbon has a low preparation cost, simple operation and a short production cycle, and meets industrial production.

The present application relates to a carbon nanotube-sulfur composite including a carbon nanotube aggregate, and a method for preparing the same.

Disclosed is a cathode plate for a secondary battery, which includes a collector, and a cathode active material layer, wherein the cathode active material layer is formed of multiple layers of coating films formed on a surface of the collector and obtained by application and drying of an aqueous paste, which is obtained by kneading and dispersing an iron lithium phosphate material having an olivine structure as the cathode active material, an electroconductive material, a water-soluble thickner, a binder, and water as a dispersion medium.

An electrode material of Fe¿CLi phosphate and its composite metal phosphate is electrode material of LiFePO4 and LiFePO4 / MxP in high density spherical shape with diameter of 2micro m. The electrode material of LiFePO4 and LiFePO4 / MxP can be prepared by low ¿C temperature controllable one ¿C stage atomizing process in short flow.

The invention discloses a Sn-Co / C alloy cathode material of a lithium ion battery and a preparation method thereof. The preparation method comprises the steps: uniformly mixing Sn powder and Co powder according to the mass ratio of (99:1) to (97:3), melting the mixture of the Sn powder and the Co powder, and carrying out spraying cooling to obtain a Sn-Co composite material; then adding an acid solution with the concentration being 1-3mol / L into a Sn-Co composite material for acid treatment to obtain a Sn-Co material subjected to the acid treatment; and mixing and sintering the Sn-Co material with an organic carbon source and asphalt in sequence to obtain an Sn-Co / C alloy cathode material. According to the invention, by adoption of acid etching, primary carbon coating based on the organic carbon source and secondary carbon coating based on the asphalt, the electrode is limited in expansion while being endowed with an expansion space, so that the material is prevented from being pulverized in a discharge / charge process. The prepared Sn-Co / C alloy cathode material is a solid solution alloy, has excellent mechanical strength, is free from the problem of electrode capacity reduction caused by the material itself, is improved in cyclic performance and electrode capacity at the same time, and has the advantages of high charge / discharge capacity and good cyclic performance.

The invention discloses a method for preparing a binder-free lithium-ion battery negative electrode material, and belongs to the technical field of nanometer material preparation technology. The electrode material based on the mixed structure of multi-walled carbon nanotubes and graphite flakes has a special structure, does not require binders of polymer compounds and metal copper foil or aluminum foil current collectors, has high conductivity and specific capacity, and shows good performance. Charge-discharge cycle performance. The preparation method of the present invention is simple and low in cost, and at the same time, the process of preparing the electrode material to assemble the electrode of the lithium ion battery is simple, the process is easy to control, and is suitable for industrial production.

The invention discloses an electrode preparation method and a battery. The battery anode is prepared by pasting an electrode film prepared from an active substrate, a conductive agent and a binder toa current collector, the surface density of a pole piece is improved, the electrode capacity and the pole piece stability are improved, and the internal resistance is reduced. In the preparation process of the electrode film, lamellar crystals of the binder are stretched to paste the active substance and conductive agent, influence of expansion and contraction of the active substance caused by ionembedding and separating is reduced. The battery cathode is prepared by coating a slurry prepared from a pre-lithium active substance, a binder and a conductive agent on the current collector, the active substrate and conductive agent of the cathode are wetted rapidly, dispersed ultra-finely and homogeneous in a binder solution, the amount of the solvent for slurry dispersion is reduced, energy consumption for drying is reduced, the electrode process is shortened, and the load capacity of the cathode active substance is improved. The anode and cathode of the battery can be designed in an integrated way, and energy storage of the battery is improved. The electrode preparation method is simple, production and manufacture are realized by means of existing equipment, and the method is easy topopularize.

The invention relates to a preparation method of an electrode material, in particular to a method for in-situ coating a conductive polymer to increase the capacity of an electrode, and belongs to the technical field of electrochemistry. In the present invention, firstly, the powdery battery material is mechanically mixed with acetylene black and ball-milled, then pressed into tablets, and assembled into a battery as a positive electrode material, charged to 3‑4.2V, and then the charged electrode material is taken out and placed in a conductive Soak in an aqueous solution of polymer monomers and surfactants, take out the soaked electrode material, wash it, and dry it to obtain the electrode material in-situ coated with a conductive polymer, which can be applied to Lithium and sodium ion batteries, and the battery capacity is greatly improved, and the preparation method is simple and easy to operate.