39 results about "Electrochemical doping" patented technology

The invention discloses composite electrode materials for a high power lithium secondary battery and a preparation method thereof. The composite electrode materials take lithium-storage active material as an inner core, conductive polymer as an outer shell, the active material inner core is mainly used for carrying out electrochemical reaction and providing main capacity for a battery, the conductive polymer material is used as a conductive agent and an adhesive when preparing electrodes, and simultaneously provides a certain amount of battery capacity by electrochemical doping and undoping reaction. By using the composite electrode materials for preparing electrodes, adhesive and conductive agent with electrochemical inertia can not be used or be used in a small amount, and the lithium secondary battery based on the composite electrode materials has high specific capacity and fine rate performance.

A nonaqueous electrolyte secondary battery comprises a cathode having a cathode active material capable of electrochemically doping / dedoping lithium, an anode having an anode active material capable of electrochemically doping / dedoping lithium and a nonaqueous electrolyte interposed between the cathode and the anode. The nonaqueous electrolyte includes at least one or more kinds of vinylene carbonate, methoxybenzene compounds or antioxidants. The nonaqueous electrolyte secondary battery has a good cyclic characteristic under any environment of low temperature, ambient temperature and high temperature.

The present invention relates to the production of electrochemical capacitors with a DEL. The proposed electrodes with DEL are based on non-metal conducting materials, including porous carbon materials, and are capable of providing for high specific energy, capacity and power parameters of electrochemical capacitors. P-type conductivity and high concentration of holes in electrode materials may be provided by thermal, ionic or electrochemical doping by acceptor impurities; irradiating by high-energy fast particles or quantums; or chemical, electrochemical and / or thermal treatment. The present invention allows for an increase in specific energy, capacity and power parameters, as well as a reduction in the cost of various electrochemical capacitors with DEL. The proposed electrodes with DEL can be used as positive and / or negative electrodes of symmetric and asymmetric electrochemical capacitors with aqueous and non-aqueous electrolytes.

The invention discloses a method for preparing a poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) composite modified electrode. The method comprises the following steps of: uniformly mixing PEDOT:PSS aqueous dispersion liquid and Nafion, which are taken as raw materials, and then directly dispensing a mixture on the surface of a composite modified electrode; and in the conventional three-electrode system, performing secondary electrochemical doping by using hydrophobic ionic liquid, and thus obtaining the PEDOT:PSS composite modified electrode which is high in water resistance and high in conductivity. The PEDOT:PSS composite modified electrode which is prepared by the method fully combines the film-forming property of the PEDOT:PSS aqueous dispersion liquid, the adhesion characteristic, biological compatibility and anti-interference characteristic of the Nafion, high conductivity and hydrophobicity of the ionic liquid and the electrochemical catalysis characteristic of a nanometer material, can be applied to electrochemical biosensors or electrochemical sensors, is directly applicable to electrochemical detection of auxin, roxithromycin, vitamin C, benzenediol isomer, organophosphorus, glucose, hydrogen peroxide and the like, and has the characteristics of good detection effect, short response time, high water resistance, wide linear range, high sensitivity, high anti-interference, high stability and the like.

A resistive element in an electrochemical artificial neural network, includes a transition metal oxide thin film forming a working electrode, a pair of first electrodes connected to the working electrode, and a reference electrode for electrochemical doping of the working electrode. The biasing of the pair of first electrodes with respect to the reference electrode according to a determination of conductivity between the pair of first electrodes controls the resistance of the working electrode.

Present invention relates to an organic light-emitting film electrochemical deposition preparation method and application in preparing electroluminescence device, belonging to organic luminescence field. Said Light-emitting film is formed by electrochemical deposition in electrolytic bath, the monomer for electrochemical polymerization formed by chemical bond connecting electricity activity unit and luminescence unit, wherein electricity activity unit consisting of carbazole, thiophene, pyrrole, ethene, ethyne or phenylamine, diphenylamine, and triphenylamine, luminescence unit being cinnamic dimer, tripolymer, tetramer or terphenyl, quaterphenyl, quinquephenyl, tetracene, pentacene, fluorene dimer, tripolymer or tetramer and terpyridyl (dipyridyl ) rhenium etc, prepared electroluminescence device having simple technology, high device luminous efficiency, easy control area adjustable luminous color etc advantages.

The invention discloses a high energy density lithium secondary battery electrode and a preparation method thereof. The electrode consists of current collector and active material layers adhered on the current collector. The active material layer is made from lithium-storage active material and conductive polymer material, and the mass ratio of the lithium-storage active material and the conductive polymer material is 100:0.1-40. In the invention, the conductive polymer material is adopted as main conductive agent and adhesive, compared with the conductive agent and adhesive of the traditional electrode, the electrode in the invention has high energy density due to that the conductive polymer material can provide a certain amount of reversible capacity for batteries by electrochemical doping and undoping reaction.

In the preparation process of carbon nanotube-polyaniline composite material for super capacitor, polyaniline is deposited onto the surface of carbon nanotube. During charging and discharging, polyaniline produces electrochemical doping-dedoping effect to generate false capacitance and to increase the specific capacitance of carbon nanotube. By means of the selection of the deposited material and the control of the deposition process, the present invention prepares carbon nanotube-polyaniline composite material with excellent performance and greatly raised specific capacitance.

The electrochemical capacitor of the invention comprises a nonaqueous electrolyte and a pair of polarizable electrodes, wherein carbon nanotubes are used as an electrode material for at least one of the positive electrode and the negative electrode, the carbon nanotubes have a specific surface area of at least 700 m2 / g and contain semiconductive carbon nanotubes, and the electrode material exhibits a voltage dependency of differential capacity by electrochemical doping.The electrochemical capacitor solves the problems with activated carbon electrodes and, exploiting the excellent characteristics of carbon nanotubes, has further increased capacitance and increased energy density, therefore realizing a reduced internal resistance and a prolonged service life.

The invention discloses a lithium pre-doping method for an electrode plate of a lithium-ion battery. Lithium pre-doping of the battery electrode plate can be finished through a solution preparation step, an electrode plate soaking step, a washing step and a drying step. The lithium pre-doping method has the advantages that lithium for pre-doping is directly catalyzed in the electrode plate; and compared with an existing electrochemical doping method, the lithium pre-doping method is relatively simple and convenient. The lithium pre-doping method is free of a specific limitation on the electrode plate; a positive electrode and a negative electrode can be simultaneously pre-doped with lithium; and the doping efficiency is improved. A porous foil is adopted by a current collector of the electrode plate disclosed by the invention, transportation of lithium ions is facilitated; the doping time is shortened; and meanwhile, the specific capacity of the electrode plate is increased. The battery prepared by lithium pre-doping has the advantages of high output voltage and high specific capacity, so that the battery has relatively high energy density.

The invention belongs to the field of organic light emission, in particular to an electro-chemical deposition preparation method of high-efficiency organic light emitting film, and an application of the light emitting film in preparing high-efficiency organic electroluminescent light emitting device. The light emitting film is prepared through an electro-chemical deposition method in an electrolytic cell in the following steps: electrolytic solution preparation, electro-chemical deposition, deposition film cleaning and drying and the like; the prepared light emitted film has the advantages of simple process, high light emission rate, small impact of electro-chemical doping on efficiency, easy control of area and size and adjustable light emission color. The light emitting film can be used as a light emission layer in the organic electroluminescent light emitting device, to prepare single-layer or multi-layer high-efficiency organic electroluminescent light emitting devices and obtain dark blue light emission devices; the lumen efficiency of the devices reaches 4.436cd / A which reaches or exceeds the efficiency level of most parts prepared through the traditional part processing technologies.

The present invention relates to a high power energy storage device additive and a lithium ion capacitor including the same, and more particularly, to: a preparation method of a new lithium ion capacitor additive which is added to a carbon-based material applied as a cathode active material of a lithium ion capacitor such that the new lithium ion capacitor additive is capable of improving capacity and energy density by electrochemically doping a lithium ion onto an anode; the lithium ion capacitor additive prepared thereby; and the lithium ion capacitor including the lithium ion capacitor additive.The lithium ion capacitor additive according to the present invention can release 3 mols or more of lithium ions even at a low voltage of 4.4 V or less, and the lithium ion capacitor including the lithium ion capacitor additive according to the present invention can electrochemically dope lithium onto the anode even without performing a pre-doping process using lithium metal as in the conventional lithium ion capacitor.

The invention relates to an oligothiophene derivative and a preparation method thereof. The preparation method of the oligothiophene derivative mainly comprises the following steps of: dissolving 3TB into dichloromethane, adding NBS (N-bromosuccinimide), stirring and reacting so as to obtain 3TB-3Br; adding EDOT (3,4-ethylenedioxythiophene) and tetrahydrofuran into a three-neck flask, controlling the reaction temperature to be minus 78 DEG C, dropwise adding n-butyllithium, gradually raising to be room temperature after the dropwise adding, and continuously reacting; subsequently decreasing the reaction temperature to be minus 78 DEG C, dropwise adding tributyl stannic chloride, gradually raising to be the room temperature after the dripping, and reacting to obtain an EDOT tin reagent; under the protection of nitrogen, adding methylbenzene into the three-neck flask, further adding the 3TB-3Br and the EDOT tin reagent, carrying out backflow reaction so as to obtain a 3TB-3Br crude product, thus obtaining pure 3TB-3EDOT through separation. As cation (or anion) free radicals generated in electrochemical doping are stable, the oligothiophene derivative can be used as a novel organic electrochromic material.

An object of the present invention is to provide nonvolatile, rewritable, easily-manufactured, and inexpensive storage element, storage device, and semiconductor device, which are superior in switching characteristics and which has low operation voltage. In an element including a first conductive layer, a second conductive layer facing the first conductive layer, and a layer containing at least one kind of an organic compound provided between the first conductive layer and the second conductive layer, the organic compound can be electrochemically doped or dedoped. By feeding current in this element, the organic compound provided between the conductive layers is electrochemically doped, i.e., electrons are transported, whereby the conductivity can be increased by about three to ten digits.

A cathode active material and non-aqueous electrolyte secondary battery. The non-aqueous electrolyte secondary battery includes a positive electrode and a negative electrode which are electrochemically doped and dedoped with lithium; and an electrolyte disposed between the positive electrode and the negative electrode. The positive electrode contains a cathode active material including a mixture of: a first cathode active material represented by a general formula: LitCoMsO2 where M represents a metal, 0≦s≦0.03, and 0.05≦t≦1.15; and a second cathode active material represented by a general formula: LixNi(1-y-z)CoyMnzAaO2 where A represents a metal, 0.05≦x≦1.15, 0.15≦y+z≦0.70, 0.05≦z≦0.40, and 0≦a≦0.10.

A soluble donor-acceptor electrochromic polymer (DA-ECP) is prepared that absorbs light throughout at least the majority of the visible range and is essentially black to the human eye when in the neutral state, but is highly transmissive when electrochemically doped. The conjugated polymer has acceptor units separated by sequences of a plurality of donor units. The sequences can be monodispersed or polydispersed. The DA-ECP is prepared by the polycondensation of a plurality of at least one donor-acceptor oligomer (DA-oligomer) that has at least one internal acceptor repeating unit and at least one donor repeating unit on all termini of the oligomer, and optionally, a plurality of at least one donor monomer and / or donor oligomer.

An object of the present invention is to provide nonvolatile, rewritable, easily-manufactured, and inexpensive storage element, storage device, and semiconductor device, which are superior in switching characteristics and which has low operation voltage. In an element including a first conductive layer, a second conductive layer facing the first conductive layer, and a layer containing at least one kind of an organic compound provided between the first conductive layer and the second conductive layer, the organic compound can be electrochemically doped or dedoped. By feeding current in this element, the organic compound provided between the conductive layers is electrochemically doped, i.e., electrons are transported, whereby the conductivity can be increased by about three to ten digits.

The invention discloses a platinum and polyaniline composite nanofiber three-dimensional functional structure film and a preparation method thereof. The preparation method of the film comprises the following steps: (1) a curing eigenstate polyaniline nanofiber is electrochemically prepared; (2) a conductive polyaniline three-dimensional structure nanofiber structure is prepared through electrochemical doping; and (3) the platinum and polyaniline composite nanofiber three-dimensional functional structure film with wholly platinum-enveloped morphology is prepared through an electrochemical deposition method. The platinum and polyaniline composite nanofiber three-dimensional functional structure film has excellent physical-chemical stability and better catalysis capacity, and can be applied to such biosensors as glucose sensors and lactic acid sensors.

A soluble donor-acceptor electrochromic polymer (DA-ECP) is prepared that absorbs light throughout at least the majority of the visible range and is essentially black to the human eye when in the neutral state, but is highly transmissive when electrochemically doped. The conjugated polymer has acceptor units separated by sequences of a plurality of donor units. The sequences can be monodispersed or polydispersed. The DA-ECP is prepared by the polycondensation of a plurality of at least one donor-acceptor oligomer (DA-oligomer) that has at least one internal acceptor repeating unit and at least one donor repeating unit on all termini of the oligomer, and optionally, a plurality of at least one donor monomer and / or donor oligomer.

The present invention relates to the production of electrochemical capacitors with a DEL. The proposed electrodes with DEL are based on non-metal conducting materials, including porous carbon materials, and are capable of providing for high specific energy, capacity and power parameters of electrochemical capacitors. P-type conductivity and high concentration of holes in electrode materials may be provided by thermal, ionic or electrochemical doping by acceptor impurities; irradiating by high-energy fast particles or quantums; or chemical, electrochemical and / or thermal treatment. The present invention allows for an increase in specific energy, capacity and power parameters, as well as a reduction in the cost of various electrochemical capacitors with DEL. The proposed electrodes with DEL can be used as positive and / or negative electrodes of symmetric and asymmetric electrochemical capacitors with aqueous and non-aqueous electrolytes.

A resistive element in an electrochemical artificial neural network, includes a transition metal oxide thin film forming a working electrode, a pair of first electrodes connected to the working electrode, and a reference electrode for electrochemical doping of the working electrode. The biasing of the pair of first electrodes with respect to the reference electrode according to a determination of conductivity between the pair of first electrodes controls the resistance of the working electrode.

An electrochemical capacitor comprising a nonaqueous electrolyte and a pair of polarizable electrodes, wherein carbon nanotubes are used as an electrode material for at least one of the positive electrode and the negative electrode, the carbon nanotubes have a specific surface area of at least 700 m2 / g and contain semiconductive carbon nanotubes, and the electrode material exhibits a voltage dependency of differential capacity by electrochemical doping. The electrochemical capacitor solves the problems associated with activated carbon electrodes and, exploiting the excellent characteristics of carbon nanotubes, has increased capacitance and increased energy density, therefore realizing a reduced internal resistance and a prolonged service life.

The present application provides a nonaqueous electrolyte secondary battery that includes, a cathode capable of being electrochemically doped / dedoped with lithium, an anode capable of being electrochemically doped / dedoped with lithium, and an electrolyte placed between the cathode and the anode, wherein the electrolyte contains at least one of fluoro ethylene carbonate represented by Chemical Formula (1) and difluoro ethylene carbonate represented by Chemical Formula (2) as a solvent and the ratio of a discharge capacity B during discharging at a 5C rate to a discharge capacity A during discharging at a 0.2C rate ((B / A)×100) is 80% or more.

The invention discloses composite electrode materials for a high power lithium secondary battery and a preparation method thereof. The composite electrode materials take lithium-storage active material as an inner core, conductive polymer as an outer shell, the active material inner core is mainly used for carrying out electrochemical reaction and providing main capacity for a battery, the conductive polymer material is used as a conductive agent and an adhesive when preparing electrodes, and simultaneously provides a certain amount of battery capacity by electrochemical doping and undoping reaction. By using the composite electrode materials for preparing electrodes, adhesive and conductive agent with electrochemical inertia can not be used or be used in a small amount, and the lithium secondary battery based on the composite electrode materials has high specific capacity and fine rate performance.

A method is provided, including the following operations: depositing a liner in a feature of a substrate; depositing a monolayer of zinc over the liner; after depositing the monolayer of zinc, performing a thermal treatment on the substrate, wherein the thermal treatment is configured to cause migration of the zinc to an interface of the liner and an oxide layer of the substrate, the migration of the zinc producing an adhesive barrier at the interface that improves adhesion between the liner and the oxide layer of the substrate; repeating the operations of depositing the monolayer of zinc and performing the thermal treatment until a predefined number of cycles is reached.

A method is provided, including the following operations: depositing a ruthenium liner in a feature of a substrate; depositing a monolayer of zinc over the ruthenium liner; after depositing the monolayer of zinc, performing a thermal treatment on the substrate, wherein the thermal treatment is configured to cause migration of the zinc to an interface of the ruthenium liner and an oxide layer of the substrate, the migration of the zinc producing an adhesive barrier at the interface that improves adhesion between the ruthenium liner and the oxide layer of the substrate; repeating the operations of depositing the monolayer of zinc and performing the thermal treatment until a predefined number of cycles is reached.

The invention discloses a titanium oxide nanotube-based supercapacitor electrode and a preparation method thereof. At the room temperature, a TiO<2> nanotube prepared by positive electrode oxidizationor various appearance modified TiO<2> nanotubes are subjected to annealing treatment, and then electrochemical reduction doping is performed in a potassium hydroxide solution; next, the product is immersed in a H<2>O<2> water solution for a certain while; and finally, the immersed TiO<2> electrode is applied to preparation of a supercapacitor. By adoption of the method, special equipment is not needed; through electrochemical doping processing in an alkali solution, the conductivity and capacitance of the TiO<2> electrode are improved; through immersion processing of the H<2>O<2> water solution, a parts of crystals on the surface of crystalline state TiO<2> is converted into non-crystals; by virtue of the non-crystal-coated crystal structure, stability of doping state can be facilitated,thereby improving cycle stability of the TiO<2> electrode; by virtue of the electrochemical doping processing in the alkali solution and by combination of immersion of H<2>O<2> water solution, the cycle life of the titanium oxide nanotube-based supercapacitor electrode is highly prolonged, so that the supercapacitor electrode can be well applied to the field of electrochemical energy storage.

A nonaqueous electrolyte secondary battery comprises a cathode having a cathode active material capable of electrochemically doping / dedoping lithium, an anode having an anode active material capable of electrochemically doping / dedoping lithium and a nonaqueous electrolyte interposed between the cathode and the anode. The nonaqueous electrolyte includes at least one or more kinds of vinylene carbonate, methoxybenzene compounds or antioxidants. The nonaqueous electrolyte secondary battery has a good cyclic characteristic under any environment of low temperature, ambient temperature and high temperature.

A method for preparing a conductive polyaniline-modified titanium-based lead dioxide electrode by anodic oxidation co-deposition method, especially a titanium-based metal oxide electrode prepared by thermal decomposition of a precursor as an anode, with Pb-containing 2+ The aqueous solution of aniline and alkali metal nitrate is used as an electrolyte, and a method for preparing a conductive polyaniline-modified titanium-based lead dioxide electrode through anodic oxidation co-deposition and electrochemical doping activation in sulfuric acid aqueous solution. The invention can realize the in-situ preparation of aniline to modify the lead dioxide electrode, and at the same time realize multiple functions such as the construction of the conductive space network of the lead dioxide electrode, the inhibition of the sulfation of the active material, and the regulation of the microstructure of the active material, and can effectively improve the lead dioxide electrode. Electrode performance.