6results about How to "Uniform conductivity" patented technology

The invention discloses a preparation method of a standardized sheet for a thermoelectric test of minerals or mineral materials and alloys, belongs to the technical field of mineralogy, material science and prospecting prediction, and establishes a preparation process of a universal mineral or mineral material and alloy thermoelectric sheet. Covering all semiconductor mineral types or mineral material types such as pyrite, magnetite, graphite and sintered ore; accurate thickness control is achieved through a double-face polishing-loading sheet supporting structure, in-situ testing of the thermoelectricity of minerals or mineral materials and alloys is achieved, and the testing precision is improved; by adopting a conductive adhesive-copper plate composite structure, the interface resistance is reduced, the supporting strength is met, and the requirement of eliminating detection interference is met; residual colloid is thoroughly removed through ultrasonic cleaning, and the insulation effect is avoided; according to the standardized sheet, the hollow aminated phenolic resin nanosphere is used as a conductive substrate and is used for bonding a sample and a copper plate, the contact resistance between the sample and an electrode can be greatly reduced, and the accuracy of test data is improved.

The invention discloses transition metal oxide / polymer gel and a preparation method thereof, a negative active material, a negative pole piece and a lithium ion battery, and belongs to the technical field of lithium ion batteries. The preparation method comprises the following steps: adding a transition metal oxide into a conductive polymer monomer-phytic acid aqueous solution, uniformly dispersing, adding an ammonium persulfate aqueous solution, and carrying out ice-bath ultrasonic treatment to obtain the gel, the molar ratio of the transition metal oxide to the conductive polymer monomer is (0.38-0.63): (0.05-1.2); and / or the molar ratio of the conductive polymer monomer to the phytic acid is (0.05-1.2): (0.03-0.5). The gel is composed of the transition metal oxide coated with the conductive polymer gel layer, use of solvents and the like is avoided, the cost is reduced, oxide particles are connected through a three-dimensional porous network of the conductive polymer gel, rapid transmission of electrons and ions is facilitated, and the conductivity of the conductive polymer gel is improved. Meanwhile, stress generated by volume expansion / shrinkage of the transition metal oxide during charging and discharging is effectively buffered, and the specific capacity, the cycling stability and the rate capability of the battery are improved.

The present invention pertains to a negative electrode for a lithium secondary battery, a method for manufacturing same, and a lithium secondary battery including same. More specifically, the negative electrode for a lithium secondary battery according to the present invention has a protective layer containing a three-dimensional structure composed of metal and lithium nitride, and thus uniform ionic conductivity and electrical conductivity can be induced on the surface of the negative electrode.

The utility model belongs to the energy -conserving and carbon -reducing electrolytic aluminium anode technical field, especially relates to a current -sharing composite electrolytic aluminium anode structure, and anode structure includes aluminium alloy guide rod, is located aluminium alloy guide rod bottom and its fixed connection's section is the composite transition structure of convex, and the composite transition structure is fixedly connected with carbon top through the graphene / copper composite expansion connecting column of its bottom, the utility model discloses the addition of graphene / copper composite board has reduced the interface resistance between expansion connecting structure and carbon, and when anode is installed on electrolytic cell, anode overall temperature rises, graphene / copper composite expansion connecting structure is heated, produces the thermal expansion outward, and the contact resistance with carbon is also smaller.

A method for preparing a carbon black-based composite conductive agent for automotive lithium batteries, belonging to the technical field of new energy automotive lithium batteries, the preparation method of the present invention uses a vapor deposition method to deposit conductive carbon black on the surface and voids of MOF-Ni3(HITP)2 to obtain MOF-Ni3(HITP)2-loaded carbon black, and then uses a spray to perform surface modification on the MOF-Ni3(HITP)2-loaded carbon black to obtain a carbon black-based composite conductive agent. The spray contains water, polyvinyl alcohol, water-based polyurethane, behenamide propyl dimethylamine and fatty alcohol polyoxyethylene ether. The carbon black-based composite conductive agent prepared by the present invention can greatly improve the dispersibility of the conductive agent, improve the conductivity and long-term conductive stability, has good high-rate charge and discharge efficiency, and improves the rate performance of lithium iron phosphate batteries.

The present invention belongs to the field of electrochemical energy storage technology, and specifically relates to a lithium ion hybrid supercapacitor with matched positive and negative electrodes and a preparation method thereof. The lithium ion hybrid supercapacitor prepared in the present invention uses a high-capacity capacitor-battery hybrid positive electrode material (carbon aerogel-manganese iron phosphate lithium composite positive electrode material) and a high-rate, long-cycle-life battery-type negative electrode material (phosphorus-carbon composite negative electrode material) as the positive and negative electrode materials of the lithium ion hybrid supercapacitor, which is conducive to achieving the maximum degree of positive and negative electrode matching. The lithium ion hybrid supercapacitor assembled therefrom has both high energy density, high power density and excellent cycle stability.