40results about How to "Improve electrode stability" patented technology

A lithium metal oxide positive electrode for a non-aqueous lithium cell is disclosed. The cell is prepared in its initial discharged state and has a general formula xLiMO₂.(1-x)Li₂M′O₃ in which 0<x<1, and where M is more than one ion with an average trivalent oxidation state and with at least one ion being Ni, and where M′ is one or more ions with an average tetravalent oxidation state. Complete cells or batteries are disclosed with anode, cathode and electrolyte as are batteries of several cells connected in parallel or series or both.

A lithium metal oxide positive electrode for a non-aqueous lithium cell is disclosed. The cell is prepared in its initial discharged state and has a general formula xLiMO₂.(1−x)Li₂M′O₃ in which 0<x<1, and where M is one or more ion with an average trivalent oxidation state and with at least one ion being Mn or Ni, and where M′ is one or more ion with an average tetravalent oxidation state. Complete cells or batteries are disclosed with anode, cathode and electrolyte as are batteries of several cells connected in parallel or series or both.

The durability of a PEM fuel cell is improved by replacing carbon catalyst support materials in the cathode (and optionally both electrodes) with a titanium oxide support. The electrode thus preferably contains noble metal containing catalyst particles carried on catalyst support particles of titanium oxide. The catalyst-bearing titanium oxide particles are mixed with electrically conductive material such as carbon particles. The combination of platinum particles deposited on titanium dioxide support particles and mixed with conductive carbon particles provides an electrode with good oxygen reduction capacity and corrosion resistance in an acid environment.

The present invention provides a complex comprising an aggregate of primary particles of an electrode-active transition metal compound and a fibrous carbon material, wherein said fibrous carbon material is present more densely in the surface region of the aggregate than in the inside of the aggregate.

Example embodiments of the present invention relate to an electrode structure, a method of manufacturing the electrode structure, a phase-change memory device having the electrode structure and a method of manufacturing the phase-change memory device. The electrode structure may include a pad, a first insulation layer pattern, a second insulation layer pattern and/or an electrode. The first insulation layer pattern may be formed on the pad. The first insulation layer pattern may have a first opening that partially exposes the pad. The second insulation layer pattern may be formed on the first insulation layer pattern. The second insulation layer pattern may have a second opening connected to the first opening. The electrode may be formed on the pad and filling the first and the second openings.

The invention relates to a potential type micro electrode sensor, in particular to a potential type micro electrode sensor capable of being used for ion detection in settlings and application thereof.The potential type micro electrode sensor is a polymer film ion selective micro electrode, and consists of a gold micro electrode, a PEDOT (PSS) conduction layer and an iron selective polymer film; the iron selective polymer film is prepared by mixing ion selective carriers containing ions to be detected and lipophilic ion exchangers (quadri(3,5-bis(trichloromethyl)phenyl)sodium borate accordingto the mol ratio of (1:2)-(1:4) and then adding polyvinyl chloride and o-nitrophenyl octyl ether. The solid contact type micro electrode has the advantages that the manufacturing is simple and convenient; the sensitivity is high; the cost is low; the miniaturization is easy, and the like. Meanwhile, the micro electrode mass transfer speed is high; the current density is great; the response speed is high, and the like. The ion field in-site analysis in settlings can be realized; the detection on various ions in the settings can be realized through changing the types of ion carriers in the ion selective films.

A binder includes a third polymer including a cross-linked product of a first polymer and a second polymer, wherein the first polymer includes a first functional group and is at least one selected from a polyamic acid and a polyimide, wherein the second polymer includes a second functional group and is water-soluble, and wherein the first polymer and the second polymer are cross-linked by an ester bond formed by a reaction of the first functional group and the second functional.

A hydride anode containing aluminium of the formula (M¹)_m(M²)_3-mAlH₆, where M¹ and M² are an alkali element selected independently from one another from Li, Na and K; m is a number between 1 and 3; n is a number ≧3, and galvanic elements, such as lithium batteries, containing as anodes said hydride anodes containing aluminum. Methods for the production of galvanic elements having hydride anodes containing aluminium is also provided.

The invention discloses a graphite felt-supported porous carbon-carbon cathode material as well as a preparation method and application thereof. The preparation method comprises the following steps: 1, adding Zn(NO3)2*6H2O and 2-methylimidazole into ultrapure water or deionized water, carrying out a reaction, and carrying out centrifugal washing on the reaction product; 2, carrying out vacuum drying, and carrying out calcining carbonization in an inert gas so as to obtain porous carbon; 3, soaking the porous carbon and a graphite felt into the ultrapure water or deionized water, isopropanol and a polytetrafluoroethylene solution, and carrying out ultrasonic dispersion; and 4, carrying out drying at 40 DEG C or lower, carrying out annealing treatment for 1-2 hours at 300-400 DEG C, and carrying out cooling to the room temperature, so as to obtain the graphite felt-supported porous carbon-carbon cathode material. When being applied to an Electro-Fenton system, the carbon electrode material is capable of increasing the yield of H2O2, and when being applied to organic pollutant removal, the carbon electrode material is capable of increasing the decoloring rate of Rhodamine B; and the carbon electrode material has great significances for completion and optimization of the Electro-Fenton system and for application and popularization in organic wastewater treatment.

The invention belongs to the technical field of lithium ion batteries, and particularly relates to a high-safety lithium ion battery electrolyte, which comprises an organic solvent, a lithium salt andan additive, wherein the additive comprises a main additive and an auxiliary additive, and the main additive is at least one of a pyrrole ionic liquid and a phosphorus-containing ionic liquid. The major characteristic of the lithium ion battery electrolyte is that the ionic liquid additives are combined, so that a formed protective film has better high voltage resistance, the side reaction loss of the electrolyte is effectively reduced, and the cycle life and the electrode stability of the battery are improved; and the thermal runaway rate of the battery is delayed through the thermal conductivity of the electrolyte, especially a flame retardant element or group is introduced, the flame retardant effect of the battery is improved, and the passing of puncture performance and weight impacttests of the battery is more facilitated.

A device for producing electrical discharges in an aqueous medium which comprises a first electrode and a second electrode comprised of a superalloy having a cobalt content of greater than 8% by weight or optionally a nickel content of greater than 8% by weight. A high electrical voltage is applied to the electrodes to produce a voltage discharge into the medium that creates a pressure wave in the medium. The electrodes of the device exhibit high thermal shock resistance during discharge thereby reducing tip burnout.

Disclosed are a lithium-air battery and a method of manufacturing the same. The weight of the battery may be reduced and the energy density thereof may be improved by eliminating two separators, which are stacked on a gas diffusion layer and a current collector in the related art, and by using two kinds of gel polymer electrolyte membranes, each including a gelled polymer matrix impregnated with an electrolyte, as a separation membrane. The volatilization, leakage or bias of the electrolyte may be prevented by restricting the fluidity of the electrolyte. In addition, the capacity and lifespan of the battery may be increased.

The invention relates to a method for manufacturing a stannic oxide nano-wire array electrode for lithium batteries, which belongs to the technical field of energy source, and comprises utilizing tin powder as raw materials, utilizing IV-VI group monomers as nano-wire growth direction exutory, utilizing noble metal as catalyst, thermally evaporating under normal pressure in 800-1300 DEG C, and getting stannic oxide nano-wire array on a silicon substrate. The invention firstly proposes to use IV-VI group monomer as growth direction exutory, which leads nano wires to preferentially grow in array as vapor-liquid-solid (VLS) mechanism on a (001) surface whose surface energy is higher, thereby getting regular, ordered and longer stannic oxide nano-wire array. The nano-wire array is suitable for lithium battery electrodes with high performance.

The invention relates to construction of a novel electrochemical sensor for L-tryptophan. According to the invention, Dawson-type polyacid (P<2>Mo<17>V) is used as a substrate, and Au-Ag nanoparticlesand PDDA-rGO are compounded by using a layer-by-layer self-assembling method so as to construct the composite film electrochemical sensor; and L-tryptophan is detected by using electrochemical means.The linear ranges of response of the sensor prepared in the invention to L-tryptophan are 6.3*10<-8> to 1.7*10<-6> M and 1.7*10<-6> to 4.1*10<-5> M, and the sensitivities of the sensor are 3.306 and1.400 [mu]A/[mu]M. The detection limit of the sensor is 4.99*10<-8> M. The sensor provided by the invention has the advantages of simple operation, low cost and strong anti-interference ability, and can quickly and effectively detect L-tryptophan in human serums.

The invention discloses a rare earth element doped titanium-based mesoporous titanium dioxide platinized catalyst material and a preparation method and application thereof. The preparation method comprises the steps that a templating agent is dissolved into alcohol, a ternary mixed solution of alcohol, acetylacetone and a titanium source is added into the templating agent and alcohol mixed solution, acid is added to regulate the pH of the solution to 2-3, a rare earth element saline solution is added, and stirring is performed to form composite collosol; and a well treated titanium strip electrode substrate is coated with the composite collosol by means of a sol-gel dip-coating method, after ageing, drying and baking are performed, and then the substrate is loaded with platinum nano particles by means of an underpotential electrodeposition method. The rare earth element doped titanium-based mesoporous titanium dioxide platinized catalyst material prepared through the preparation methodhas the characteristics that the material is of a regular and orderly porous structure, and the pore size is continuously adjustable; high-selectivity electrolytic oxidation of glycerinum can be achieved to generate glyceraldehyde, under the conditions that the temperature is 30 DEG C and the current density is 25 mA/cm<2>, the productive rate of the glyceraldehyde obtained through electrolysis can reach up to 90.4%, and the current efficiency reaches up to 86.3%.

The invention provides a multifunctional integrated composite electrode slurry material containing an active carbonyl polymer and a preparation method of the slurry material. The active carbonyl polymer can partially or completely replace a traditional binder and a stabilizer, and thus the consumption of inactive components in the traditional electrode slurry material is decreased, and the lithiumion diffusion capability of the electrode is improved; and meanwhile, the capacity can be contributed by the active carbonyl, so that the power density and energy density of the electrode are effectively improved. The electrode slurry material containing the active carbonyl polymer is characterized in that in solid phase components, the mass fraction of an electrode active material is 90-95 %, the mass fraction of a conductive additive is 0.5-5 %, the mass fraction of the active carbonyl polymer is 0.5-12 %, the mass fraction of the binder is 0-10 %, and the mass fraction of the stabilizer is0-2 %.

Disclosed is a hollow sulfide microsphere with enriched sulfur vacancies, which is prepared by a method comprising the steps of: dissolving cobalt nitrate and nickel nitrate in a mixed solution of N, N-dimethylformamide and acetone with an equal volume; then adding a chelating agent thereto, subjecting a resulting mixture to a solvothermal reaction to obtain a coordination polymer microsphere; dissolving the coordination polymer microsphere and a sulfurization agent in an organic solvent, and reacting to obtain a hollow sulfide microsphere; and subjecting the hollow sulfide microsphere to reduction treatment with sodium borohydride, centrifuging, washing and drying to obtain the hollow sulfide microsphere with enriched sulfur vacancies having a particle size of 1-2.5 μm, a shell thickness of 15-30 nm and a specific capacity of the material of 763.4 C g⁻¹ (current density is 1 A g⁻¹).

The invention relates to the field of new energy batteries, and particularly provides a secondary battery, a preparation method thereof and electric equipment. The secondary battery comprises a molybdenum oxide positive electrode, a lithium-containing solid electrolyte and a molybdenum oxide negative electrode which are laminated in sequence. The structure of the secondary battery is a lithium-free symmetrical battery structure, the positive electrode and the negative electrode of the battery are low in price, the electrode stability is good, the secondary battery is easy to store, the first coulomb efficiency of the battery is 96% or above on average, 80% or above of capacity can still be kept after 3000 cycles, and meanwhile, the secondary battery is excellent in high and low temperatureperformance and easy to store. And the stability can still be kept when working at the temperature of 50-400 DEG C, and the capacity is about two times of that at the normal temperature.

The invention discloses an electrolyte for a high-nickel lithium ion battery, a preparation method of the electrolyte and the high-nickel lithium ion battery, the electrolyte comprises a non-aqueous organic solvent, a high-concentration lithium salt and an electrolyte additive, the electrolyte additive comprises unsaturated carbonate, a lithium salt and 2-methyl maleic anhydride, the content of the unsaturated carbonic ester, the lithium salt and the 2-methyl maleic anhydride is 0.5 wt%-10 wt%. The electrolyte can effectively improve the high-temperature stability of the high-nickel lithium ion battery, and the thermal runaway heat of the battery solvent is reduced.