221results about How to "Improve air stability" patented technology

An additive for use in the preparation of lightweight concrete, said additive including a blend of from around 40% to 99% of organic polymeric material and from 1% to around 60% of an air entraining agent. The additive is particularly suitable for the preparation of lightweight concrete which uses polystyrene aggregate. It provides for excellent dispersion of the polystyrene aggregate and improved bond between the polystyrene aggregate and surrounding cementitious binder. The resultant lightweight concrete formulation may be pumped and is particularly suitable for sandwich wall construction.

The addition of a highly polarizable additive such as an organic anionic surfactant to an electrically active polymer improves the electrical properties of the polymer. When such an additive is added to an electroluminescent organic polymer this mixture can be used in diodes having an anode contacting a layer of this mixture as the active light-emitting layer and an air-stable metal cathode having a work function larger than 4 eV. The external efficiency and brightness versus voltage are significantly improved compared to results obtained with the same electroluminescent polymer used alone with high work function (>4.0 eV) metal cathodes. Specifically, device performance with indium/tin-oxide (ITO) as the anode, poly(2-methoxy-5-(2'-ethyl-hexyloxy)-1,4-phenylene vinylene), MEH-PPV, as the electroluminescent polymer, lithium nonylphenoxy ether sulfate as the surfactant additive and aluminum as the cathode is comparable to or better than that obtained with high performance devices using calcium as the cathode.

The present invention provides a lithium metal powder protected by a substantially continuous layer of a polymer. Such a substantially continuous polymer layer provides improved protection such as compared to typical CO₂-passivation.

A rechargeable energy storage device is disclosed. In at least one embodiment the energy storage device includes an air electrode providing an electrochemical process comprising reduction and evolution of oxygen and a capacitive electrode enables an electrode process consisting of non-faradic reactions based on ion absorption/desorption and/or faradic reactions. This rechargeable energy storage device is a hybrid system of fuel cells and ultracapacitors, pseudocapacitors, and/or secondary batteries.

The invention provides sulfide solid electrolytes shown by a formula (I) and sulfide solid electrolytes shown by a formula (II). The invention further provides a design thought and a preparation method of the sulfide solid electrolytes. A certain amount of oxide is doped and added to or compounded to the sulfide solid electrolytes, the air stability of the sulfide solid electrolytes is improved, and the ionic conductivity of the sulfide solid electrolytes is kept.

The invention provides a sulfide solid electrolyte based on oxygen doping. The sulfide solid electrolyte is prepared from the chemical ingredients, in percentage by mass: 36-60% of lithium sulfide orlithium selenide, 18-48% of phosphorus pentasulfide or phosphorus selenide, 1-23% of metal oxide or specific nonmetallic oxide and 8-37% of lithium chloride, lithium bromide or lithium iodide. The preparation method of the sulfide solid electrolyte mainly comprises the steps that the raw materials are sufficiently blended and subjected to tabletting, then placed in a quartz tube to be burned and sealed, the product is placed in a muffle furnace and heated to be 400-600 DEG C at a slow heating rate, the optimal heating rate is 0.3 DEG C/minute, heat preservation is conducted for 12-48 hours, and then the product is cooled to reach the room temperature; and the product is ground to be powder, and the sulfide solid electrolyte based on oxygen doping is prepared. The sulfide solid electrolyteis easy to prepare and high in repeatability, the prepared solid electrolyte has the high ionic conductivity and good stability to the air and positive and negative electrodes.

The invention belongs to the field of thermal batteries, and relate to a carbon coated thermal battery electrode material and a preparation method thereof. Glucose and other carbon sources are added in the process of preparing cobalt disulfide through a hydrothermal method, and the cobalt disulfide electrode material with a carbon coated structure is prepared in situ; the mass content of carbon in the obtained material relative to cobalt disulfide ranges from 1% to 25%. The electrode material has the advantages of being high in specific capacity, good in air stability, simple in preparation process, easy to prepare in a large scale and the like.

The invention provides a sulfide solid electrolyte which has a chemical formula shown in formula I or formula II: Li3+3xP1-xZnxS4-xOx (formula I) and Li3P1-xSbxS4-2.5xO2.5x (formula II), wherein x isgrater than or equal to 0.01 and less than or equal to 0.05. According to the invention, a certain amount of ZnO or Sb2O5 is used for double-doping modification of a sulfide solid electrolyte materialLi3PS4 to not only improve air stability of the modified sulfide solid electrolyte, but also benefit to improvement of electrical conductivity of lithium ions. The invention also provides a preparation method of the sulfide solid electrolyte and an all-solid-state lithium secondary battery.

High performance organic photovoltaic cells based on donor acceptor polymers in the active layer. A composition comprising: at least one copolymer comprising at least one first donor moiety and at least one first acceptor moiety in the copolymer backbone, wherein the first acceptor moiety comprises at least one first ring which is bivalently linked to the copolymer backbone and at least one second ring fused to the first ring and not bivalently linked to the copolymer backbone, wherein the first ring or the second ring comprises two adjacent fluoro ring substituents, and optionally, wherein the donor comprises at least one fused ring system. High efficiency, high Voc, and a combination of both can be achieved.

The invention discloses a basalt fibre composite rib and a basalt fibre composite inhaul cable. The composite rib is formed by drawing, extruding, molding and compounding basalt fibre and carbon fibre under the pretension action, and fibre volume ratio is 4:1-1:1; the basalt fibre composite inhaul cable comprises an outer protecting layer and fibre reinforcement material arranged in the outer protecting layer, the fibre reinforcement material comprises a center rib and an outer rib, the center rib is composed of a basalt fibre rib or carbon fibre rib, the outer rib is composed of the basalt fibre composite rib, an adhesive elastic filling layer and an inner sleeve are arranged between the center rib and the outer rib, the inner side of the inner sleeve is connected with the adhesive elastic filling layer, and the outer side of the inner sleeve is connected with the outer rib. In the composite inhaul cable, the carbon fibre content occupies 25-40 percent of total fibre content of the inhaul cable. Compared with the prior art, the composite carbon fibre of the basalt fibre composite inhaul cable in the basalt fibre enables short-period and long-period mechanical property and chemical property of the inhaul integer to be better, and has remarkable economy.

The invention discloses a carbon-coated lithium supplementing material as well as a preparation method and application thereof. The carbon-coated lithium supplementing material comprises a lithium-containing compound, an inorganic nonmetal reducing agent and a carbon-containing coating layer partially or completely coating the surface of the lithium-containing compound or/and the inorganic nonmetal reducing agent. According to the carbon-coated lithium supplementing material provided by the invention, agglomeration and growth of the lithium supplementing agent in the synthesis process can be inhibited through carbon coating, the air stability and conductivity of the lithium supplementing agent are improved, the lithium supplementing agent is catalyzed to be decomposed at a relatively low potential to release lithium ions, the lithium supplementing capacity is increased, and the effect of improving the energy density of the battery is achieved; and the carbon-coated lithium supplementing material is simple in preparation process and is beneficial to wide popularization and application. When the carbon-coated lithium supplementing material provided by the invention is added into thepositive electrode of a lithium secondary battery, the irreversible lithium loss of the first charge-discharge negative electrode can be compensated, and the energy density of the battery is improved.The activity of the lithium supplementing material can be improved through surface carbon coating, the air stability is improved, and large-scale application of the lithium supplementing agent in a lithium ion energy storage device is realized.

The invention relates to a method for preparing a 2D perovskite quantum well film with a high gain property. The method comprises the following steps: dissolving AX and PbX2 into a precursor solvent according to a mole ratio of 2 to 1, performing heating ultrasonic treatment till the solids are completely dissolved so as to obtain a precursor solution of 2D perovskite A2PbX4; dissolving BX and PbX2 into the precursor solvent according to the identical mole ratio so as to obtain a precursor solution of 3D perovskit BPbX3; performing isopyknic mixing on the two precursor solutions of perovskit according to a mole ratio of 1 to n-1 so as to obtain a precursor solution of a 2D perovskite quantum well material; dropping the precursor solution of the 2D perovskite quantum well material onto a substrate by using a pipette, and after the solution spreads off and is retained for 2-10 minutes on the substrate, performing spinning filming, removing the precursor solvent, so as to obtain the 2D perovskite quantum well film. By adopting the method, the optical and thermal stability and the gain properties of the 2D perovskite quantum well film can be improved.

The invention discloses a sulfide solid electrolyte material with high stability to lithium, a preparation method thereof. A chemical composition is 7Li2S. XP2S5. YMmOn, x is greater than 0, y is greater than 0, m is greater than 0, n is greater than 0, and M is a metal element. The preparation method comprises the following steps: mixing and ball-milling Li2S, P2S5 and MmOn to obtain an initial solid electrolyte material; and putting the obtained initial solid electrolyte material into a quartz test tube, sealing, carrying out heat treatment, and grinding into powder in an inert gas atmosphere to obtain the sulfide solid electrolyte material with high stability to lithium. The electrolyte also has the advantages of high air stability, good stability to lithium metal, wide electrochemicalwindow and the like, and the all-solid-state lithium battery assembled by the solid electrolyte material has the characteristics of high charge-discharge specific capacity, high safety, excellent cycle stability and the like.

The invention discloses an anode material for a sodium-ion battery doped with various metals and with air stability, a preparation method thereof and a method for increasing the air stability of a NaAO2 type anode material. The anode material for the sodium-ion battery doped with various metals is prepared according to the steps of early mixing, tabletting and high-temperature calcination. The preparation method is simple in process; the raw materials are easily acquired and are low in cost; and the practicability is high. The anode material for the sodium-ion battery, provided by the invention, has high air stability and higher charge-discharge specific capacity, so that the sodium-ion battery can be used as a novel high-energy density energy-storing material which is simply prepared and conveniently stored. The application prospect is wide.

The invention relates to a method for preparing nanometer metallic oxide by bulk metallic oxide, which belongs to the technical field of preparation of nanometer materials. Cadmium oxide, zinc oxide and gallium oxide bulk materials are respectively used as raw materials, oleic acid and oleylamine are used as auxiliary materials, and corresponding nanometer metallic oxide is obtained by a solutionrecrystallization process. The shape and the size of the generated nanometer metallic oxide can be adjusted by means of controlling the concentration of an oxide source and reaction time, and the obtained nanometer metallic oxide still has the structure of the bulk materials. The bulk metallic oxide is directly converted into the nanometer metallic oxide, the raw materials used in the preparationmethod are common, cheap and relatively safe, and air stability is high. In addition, the preparation method has the advantages of simple synthetic process, high repeatability, fine sample crystallinity, uniform size distribution and the like, and has a potential of producing the nanometer metallic oxide on a large scale.

An organic semiconductor polymer, a transistor including an organic semiconductor polymer and methods of fabricating the same are provided, the organic semiconductor polymer including an aromatic or heteroaromatic main chain and at least one of a fluoro or a perfluoroalkyl at a polymer terminal end.

The invention, which belongs to the organic semiconductor thin-film solar battery field, discloses a solar cell based on a nano-onion-carbon composite anode buffer layer. On the basis of an ortho type structure, the solar cell comprises a substrate (1), a transparent conductive anode ITO (2), a composite anode buffer layer (3), an optical active layer (4), a cathode buffer layer (5), and a metal cathode (6), wherein the layers are arranged successively from bottom to top. The composite anode buffer layer is formed based on compounding of a conductive polymer PEDOT:PSS, a micromolecule material F4-TCNQ, and a nano onion carbon material. The conductive polymer PEDOT:PSS is doped with the micromolecule material F4-TCN with a certain proportion and a high-conductivity nano onion carbon material, so that the photoelectric conversion efficiency of the device is improved, the air stability of the organic thin-film solar cell is enhanced, and the service life is prolonged.

The invention relates to a preparation method of silica-coated all-inorganic perovskite core-shell structure quantum dots. The preparation method comprises the following steps: completely dissolving cesium carbonate in n-caprylic acid to obtain a cesium precursor solution, dissolving lead bromide and tetra-n-octylammonium bromide in toluene to obtain a lead bromide/toluene solution; and then, sequentially adding an aminosilane coupling agent and the cesium precursor solution into the lead bromide/toluene solution, stirring for reaction, and separating and drying an obtained product to obtain the target product. Compared with the prior art, the preparation method disclosed by the invention is simple and loose in condition, the fluorescence characteristic of the prepared product is not reduced, the stability is greatly improved compared with that of pure CsPbBr3, and the product can be used as fluorescent powder to be packaged into a photoelectric device for application.

The invention discloses a flexible organic photoelectric detector and a preparation method thereof. The photoelectric detector comprises a flexible substrate (1), an organic active layer (2) and an electrode (3). The organic active layer (2) is located on the upper surface of the flexible substrate (1). The electrode (3) is located on the organic active layer (2). The organic active layer (2) is abulk-heterojunction film formed by tetrafluoride and quinoxaline polymers PffQx-BDTT (21) and fullerene derivatives and is prepared through the roll-to-roll printing process. The electrode (3) can beprepared through evaporation or ink-jet printing or silk-screen printing. The photoelectric detector is excellent in photoelectric detection performance, stable in performance in air and good in flexibility. The preparation method of the photoelectric detector is simple in process and low in cost. The method is suitable for large-area preparation and can be widely applied.

The invention discloses a novel polymer solar cell with a dual-electron transmission layer. The novel polymer solar cell comprises a transparent conductive substrate; an inorganic/organic material laminated electron transmission layer, wherein the electron transmission layer is of a laminated structure formed by an inorganic material nano zinc oxide and an organic material PFN, and zinc oxide is annealed with a rapid heat treatment method; a luminous absorption layer; a cavity transmission layer; and a metal electrode. The high-efficiency polymer solar cell can be prepared by a solution method, the cost is low, and the large-scaled production is facilitated. The novel dual-electron transmission layer is adopted, to that the good electric conductivity of the inorganic material is inherited, and an interface dipole layer generated by the organic matter facilitates the extraction and transmission of electrons. Rapid heat treatment is carried out on the inorganic material, the crystallinity of the material is further improved, and the electron mobility is increased. The polymer solar cell subjected to the rapid heat treatment and provided with the dual-electron transmission layer has the advantages that compared with a device using a single polymer layer as the electron transmission layer, the performance is improved by 23% and reaches 9.31%.

The invention provides a preparation method of a silver nanowire mesh-reduced graphene oxide combined electrode, comprising the following steps: depositing silver nanowire on the surface of a substrate to obtain a silver nanowire mesh; coating the upper surface of the silver nanowire mesh with a graphene oxide aqueous solution to form a silver nanowire mesh-reduced graphene oxide composite film onthe surface of the substrate; and carrying out ultraviolet irradiation on the silver nanowire mesh-reduced graphene oxide composite film to obtain the silver nanowire mesh-reduced graphene oxide combined electrode. According to the preparation method, plasma resonance effect on the surface of silver nanowires is assisted with ultraviolet irradiation for reduction of graphene oxide so as to obtainthe silver nanowire mesh-reduced graphene oxide combined electrode. The preparation method has simple steps, is low-cost and is easy for operation; and the combined electrode has excellent air stability and high conductivity.

The invention discloses a layered oxide positive electrode material with excellent air stability and a method for improving the air stability by adjusting the sodium content. The layered oxide positive electrode material is of an O<3> phase, and the chemical formula is Na<x>MeO<>2, wherein Me at least contains one or more elements of Li, Ni, Fe, Co and Mn, x is the stoichiometric number of Na, and x is greater than or equal to 0.93 and less then or equal to 0.95. By reducing the content of sodium ions in the O<3> type layered positive electrode material of the sodium ion battery, enhancing the strength of Na-O bonds, reducing the probability of reaction with the outside, improving the valence state of transition metal ions in the material and improving the oxidation resistance of the material, the electrode material with more excellent air stability is obtained. The preparation method disclosed by the invention is simple and easy to operate, rich in raw materials, low in price and high in practical application degree, so that a new insight is provided for optimization design of the layered positive electrode material of the high-performance sodium-ion battery, and the preparation method has a wide application prospect.

The invention discloses a preparation method of a ternary organic solar cell, and belongs to the field of the solar cell. The preparation method comprises the following steps of (1) configuration of an active layer material: taking CB as a solvent, taking PTB7 and a coumarin derivative as a donor material based on the mass ratio of PTB7 to the coumarin derivative of 0.7:0.1-1:0.l; taking PC71BM asan acceptor material at the mass ratio of the donor material to the acceptor material of 1:1-1:3; enabling the donor material, the acceptor material and the solvent to be mixed into an active layer solution with the concentration of 7-15mg/ml; (2) performing ZnO solution configuration; (3) performing cleaning on ITO glass, and then carrying out plasma ozone treatment; (4) spin coating the surfaceof the ITO glass with ZnO, and then carrying out heating and annealing; (5) spin coating the annealed ITO glass with the active layer material, and then carrying out heating and annealing to form anactive layer; and (6) evaporating an MoO<3> layer on the surface of the active layer and then evaporating an Ag electrode. By virtue of the preparation method, efficiency improvement of the device canbe facilitated.

The present invention discloses a perovskite nanowire array photoelectric detector and a preparation method thereof. The photoelectric detector comprises a substrate (1), an organic-inorganic hybrid perovskite nanowire array (2) composited at the upper surface of the substrate (1) and an electrode (4) arranged at the upper portion of the organic-inorganic hybrid perovskite nanowire array (2), a 4, 4'-cyclohexyl-2[N, N-2(4-methylphenyl)aniline] protective layer (3) is composited at the upper surface of the substrate (1), the upper portion of the organic-inorganic hybrid perovskite nanowire array (2) is coated with the 4, 4'-cyclohexyl-2[N, N-2(4-methylphenyl)aniline] protective layer (3), and the electrode (4) is arranged at the upper surface of the 4, 4'-cyclohexyl-2[N, N-2(4-methylphenyl)aniline] protective layer (3). The perovskite nanowire array photoelectric detector is good in photoelectric detection performance, stable in performance in the air and low in cost.

The invention relates to a separable and recyclable sulfide type solid electrolyte and application thereof. The sulfide-type solid electrolyte is a P-free Sn-based sulfide, the general formula is LiaSnbAcSd, A is an element for doping and substituting Sn and is selected from at least one of As, Sb, Bi, Si, W and Mo, a is greater than 0 and less than or equal to 4, b is greater than or equal to 0 and less than or equal to 1, c is greater than or equal to 0 and less than or equal to 0.3 and d is equal to 4; the sulfide type solid electrolyte is dissolved in water, the sulfide type solid electrolyte absorbing water is heated, the crystal structure of the heated material is the same as the crystal structure of the original sulfide type solid electrolyte material, and the reduction of the ionicconductivity is less than 5%; and the temperature of the heating treatment is 150-700 DEG C.

The invention discloses an air-stable layered transition metal oxide positive electrode material and a sodium ion battery thereof. The chemical formula of a co-phase structure of the layered transition metal oxide positive electrode material P2/O3 is Na<1-x>Li<x>(Mn<0.67>Ni<0.33-y>Fe<y>)<1-x>O<2>, x is greater than 0 and less than or equal to 0.2, and y is greater than or equal to 0 and less thanor equal to 0.2. The synergistic effect of P2/O3 phase coexistence enables the positive electrode material and the sodium ion battery to show excellent electrochemical performance. The positive electrode material has the characteristics of low raw material cost, air stability, excellent performance, easiness in synthesis and environmental friendliness, and the sodium ion battery constructed by thepositive electrode material has the advantages of high energy density, cycling stability and good rate capability.