32results about How to "Lower initial resistance" patented technology

Disclosed is a separator for non-aqueous batteries which not only has a shutdown mechanism, but can also achieve a higher output and has short-circuit resistance. The separator is configured of a laminate which is provided with a low melting point polymer-fibre layer (A), formed of a low melting point polymer having a melting point of 100-200 DEG C, and a heat-resistant polymer-fibre layer (B), formed above the low melting point polymer-fibre layer (A) and formed of a heat infusible polymer or a high melting point polymer, having a melting point of over 200 DEG C. The low melting point polymer-fibre layer (A) includes low melting point polymer fibres having a fibre diameter not greater than 1000nm; the heat-resistant polymer-fibre layer (B) is formed from the heat resistant polymers and includes an amalgam of nanofibres and non-nanofibres.

A conductive particle comprising: a core particle having an electrical conductivity; and a insulating coating provided on the surface of the core particle and comprising an organic polymeric compound, wherein the conductive particle has a coverage ratio as defined by the formula (1) of 20 to 40%.

An overcurrent protection device includes a first electrode, a second electrode and a positive temperature coefficient multilayer structure including a first polymer layer, a second polymer layer and a third polymer layer. The first polymer layer is bonded to the first electrode and has a first polymer substrate made of a first polymer composition. The second polymer layer has perforations and has a second polymer substrate made of a second polymer composition. The third polymer layer is bonded to the second electrode and has a third polymer substrate made of a third polymer composition. The overcurrent protection device of the present invention has both low initial resistance and sufficient peeling strength.

The invention discloses a method for preparing a storage unit of a resistance random access memory. Step 1, forming a conductive film on the surface of a substrate as a first electrode; Step 2, preparing an argon plasma bombardment treatment on the surface of the first electrode obtained in step 1 The ZnO thin film is used as the intermediate layer; step 3, the conductive film is prepared on the surface of the intermediate layer obtained in step 2 as the second electrode; step 4, an isolated device is prepared on the basis of the structure obtained in step 3, and the resistive random access memory is obtained storage unit. The invention provides a method for preparing a storage unit of a resistive random access memory, which performs argon plasma bombardment treatment on a ZnO thin film as an intermediate medium layer, thereby greatly improving the flatness of the surface of the ZnO thin film; ZnO treated with the argon plasma bombardment The memory prepared by the thin film as the intermediate layer initially exhibits a low-resistance state, and the erasing and writing of all devices does not require an electrical formation process, and the erasing and writing voltage is relatively small.

The present invention pertains to a method for producing a positive electrode active material for secondary batteries, the method comprising: a step for preparing a positive electrode active material precursor containing at least 60 mol% of nickel (Ni) with respect to the entirety of the metal components; a step for mixing the positive electrode active material precursor and a lithium source material, and performing first pre-firing under an oxidizing atmosphere to form a pre-fired product; and a step for performing a second main-firing on the pre-fired product under an air atmosphere to form a lithium transition metal oxide.

The invention relates to an anti-CO interference ethanol sensing material, a preparation method and a gas sensitive sensing element using the sensing material. The ethanol sensing material is composed of 0.1%-0.5% La2O3 powder and 99.9%-99.5% % Sb-doped SnO2 nanometer powder is mixed, and the Sb / Sn molar ratio in the Sb-doped SnO2 nanometer powder is 0.05-0.1%. The preparation method comprises: preparing tin chloride ethanol solution and antimony-containing hydrochloric acid solution according to the above-mentioned Sb / Sn molar ratio, adding the antimony-containing hydrochloric acid solution dropwise into the tin chloride ethanol solution, stirring and mixing, adding a chelating agent, and then Add ammonia water dropwise until the pH value reaches 9.0, take the precipitated product, wash, dry, and sinter to obtain Sb-doped SnO2 nanopowder, and then grind and mix with La2O3 powder according to the above ratio to obtain the final product. The sensing material has a low initial resistance and a much higher response to ethanol than CO.

The invention belongs to the technical field of functional composite materials, and provides a fast-response highly-sensitive polymer-based gas-sensitive material and a preparation method thereof in order to solve the problem of long gas response time of a silicon rubber gas-sensitive material filled with conductive particles. The gas-sensitive material comprises, by mass, 2-35 parts of conductive nano-particles, 100 parts of silicone rubber and 0.05-7 part of montmorillonite. The preparation method comprises the steps of solution blending, and casting film molding. The material has detection and early warning functions to toxic and flammable solvent vapor, obviously shortens the gas response time, can reach a high gas sensitivity within a short time, and has a very good reusable stability.

The present invention relates to: a non-aqueous electrolytic solution including an organic solvent, a lithium salt, and an additive, wherein the additive includes a compound represented by chemical formula I and a compound represented by chemical formula II; and a lithium secondary battery comprising same.

The invention discloses a flexible sensor and a preparation method thereof. The flexible sensor is featured in that the protonic acid doping peak in the infrared Fourier spectra of a protonic-acid-doped polyaniline sheet is 1240cm<-1>, two ends of the protonic-acid-doped polyaniline sheet are provided with electrodes, and the protonic-acid-doped polyaniline sheet is coated with a flexible insulating material. The method comprises steps of firstly uniformly mixing aniline and protonic acid to obtain a transparent solution, placing an anode and a graphite cathode in the transparent mixed solution for electrodeposition to obtain protonic-acid-doped polyaniline coating on the anode, then dying the protonic-acid-doped polyaniline, arranging electrodes at two ends of the protonic-acid-doped polyaniline to obtain electrode-contained protonic-acid-doped polyaniline coating on the anode, separating the electrode-contained protonic-acid-doped polyaniline from the anode, coating the flexible insulating material on the surface of the protonic-acid-doped polyaniline provided with the electrodes at two ends, and dying the coated protonic-acid-doped polyaniline to obtain a target product. The flexible sensor has a high resistance change rate in stretching, can be widely used in working conditions of folding, distorting, stretching and the like, and is particularly suitable for the field of wearable equipment.

The present invention provides a conductive particle, a conductive material, and a contact structure. The conductive particle is characterized in that: in the conductive particle electrically connected to the electrode by being contained between the electrodes, the conductive particle includes an insulator core, and is equipped with an insulator core. The conductive layer or the conductive layer with protrusions on the surface of the above-mentioned core, after compressing the above-mentioned conductive particles at 25° C. using a micro-pressure tester, the deformation rate of the above-mentioned conductive particles is used as the x-axis and is expressed by the following formula 1 In the graph plotted with the determined elastic work ratio as the y-axis, the interval (a) where a certain elastic work ratio is maintained after the first discontinuity point and the interval (b) where a constant x elastic work ratio is maintained after the second discontinuity point ) within the deformation rate range of the conductive particles, the above-mentioned oxide plating layer is destroyed by the above-mentioned electrode layer or the above-mentioned conductive layer with protrusions [Formula 1] nIT=W elastic / W total *100.

The invention discloses a tension-sensitive sensor with a positive resistance effect. The tension-sensitive sensor comprises a tension-sensitive material and a metal electrode made on the surface of the tension-sensitive material; and the tension-sensitive material is a conductive rubber material with the resistivity between 1.0 * 10<-3> omega.cm and 1.0 * 10<1> omega.cm, prepared through filling a rubber material with a conductive filler. The tension-sensitive sensor with a positive resistance effect has increasing resistance under the action of tension, that is the tension-sensitive sensor having a positive resistance effect, and the tension-sensitive sensor in a tensile deformation range being lower than 100% can generate 1000 times or above resistance change. Resistance change of the sensor before and after tension is converted into a high and low level current, voltage or capacitance signal which can be used for detecting the information of outside action force. The sensor has the advantages of good material flexibility, large mechanical quantity change amplitude and simple structure, so the sensor has wide application prospect in fields of electronic technologies, apparatus instruments, health medical treatment and artificial intelligence.

The invention discloses a preparation method of Pd quantum dot modified molybdenum oxide nanofiber paper, which is exclusively used for preparing a hydrogen-sensitive element in a high-performance hydrogen sensor with fast response ability at normal temperature and is an improvement based on Molybdenum Oxide Nanofiber Paper and Preparation Method thereof (CN104909407B). The preparation method is characterized by uniformly adding 0.013-0.034 weight parts of Pd quantum dots into the suspension D in a process of stirring a suspension D in the step (5); in a process of preparing a hydrogen-sensitive element of a hydrogen sensor by use of the nanofiber paper, in an environment with relatively low hydrogen concentration, initial resistance is lower, the response time and recovery time of the sensor are shorter while the sensitivity is high, and the performance is stable at normal temperature while recycling can be realized; and the integrated hydrogen-sensitive element also can be conveniently integrated in various flexible circuits. The preparation method disclosed by the invention has the advantages of simple technology, low energy consumption and pollution-free preparation process.