375results about How to "Increase energy density" patented technology

Processes and systems for formation of high voltage, anodic oxide on a valve metal anode. The processes generally includes immersing a valve metal anode in an electrolyte forming bath comprised of a formation electrolyte, performing an anodization step; and maintaining or regulating the temperature of the formation electrolyte accurately at a temperature at or below 40° C. during the anodization step. The anodization firstly under constant current until a target potential is reached and secondly under constant potential at the target potential until the current falls below a predetermined termination current level. The systems generally include a tank configured to receive one or more anodes in an electrolyte forming bath comprised of a formation electrolyte; and a subsystem for cooling and maintaining the formation electrolyte at the desire processing temperature. The systems may further include electronic controls for monitoring and adjusting system or process parameters.

The invention relates to a direct-driving wave power-generating and energy-storing device and a control method. The direct-driving wave power-generating and energy-storing device is characterized by comprising a direct-driving wave generator, an AC/DC (Alternating Current or Direct Current) converter, a DC/AC (Direct Current or Alternating Current) converter, a plurality of loads, two DC/DC (Direct Current or Direct Current) converters, a mixed energy storing system and a controller, wherein the mixed energy storing system comprises an ultra-capacitor bank and a storage battery pack; the direct-driving wave generator is used for converting the kinetic energy of waves to a low frequency alternating current and sending to the AC/DC converter; the AC/DC converter is used for converting the low frequency alternating current to a direct current and connect and connected with the input end of the DC/AC converter through a direct current bus; the output end of the DC/AC converter is connected with the loads; the direct current bus is respectively connected with one ends of the two DC/DC converters, the other end of one of the two DC/DC converters is connected with the capacitor bank, and the other end of the other of the two DC/DC converters is connected with the storage battery pack; and the controller is used for controlling the ultra-capacitor bank and the storage battery pack to regulate power flow so as to keep the balance between the output power of the direct-driving wave generator and the power of the loads. The invention can be widely applied to the process of converting the kinetic energy of sea water fluctuation to the electric energy.

A galvanic element includes the following elements in the order listed: a current collector associated with an anode; the anode; an ion-conducting separator in the form of a continuous layer; a cathode; and a current collector associated with the cathode. The anode encompasses an ion-conducting support structure, and both the ion-conducting support structure and the separator encompasses an ion-conducting material. The ion-conducing support structure is porous.

The invention discloses a hydraulic excavating energy saving system. The hydraulic excavating energy saving system comprises a movable arm driving oil cylinder, a loading mechanism, an oil-electricity-liquid hybrid driving system, a hydraulic accumulator control unit, a hydraulic control unit of the movable arm driving oil cylinder, a hydraulic control unit of the loading mechanism, a first one-way valve, a second one-way valve, a third one-way valve, a first hydraulic accumulator and a second hydraulic accumulator. The hydraulic excavating energy saving system combines the advantages of an oil-electricity hybrid power system and a hydraulic hybrid power system in the aspect of a power system, can meet the requirements of load on high power density and high energy density at the same time, and conforms to a principle of minimizing an energy transformation link in the aspect of energy recovery and recycle; and the hydraulic accumulators and a storage battery are shared by a power system and an energy recovering system. Therefore, the working efficiency of an engine can be improved, the energy consumption and loss of the energy recovery system can be reduced, and the work stability of the engine cannot be influenced.

It is an object of the invention that, in semiconductor device, in order to promote the tendency of miniaturization of each display pixel pitch, which will be resulted in with the tendency toward the higher precision (increase of pixel number) and further miniaturizations, a plurality of elements is formed within a limited area and the area occupied by the elements is compacted so as to be integrated. A plurality of semiconductor layers 13, 15 is formed on different layers with insulating film 14 sandwiched therebetween. After carrying out crystallization by means of laser beam, on each semiconductor layer (semiconductor layers 16, 17 having crystal structure respectively), an N-channel type TFT of inversed stagger structure and a P-channel type TFT 30 of top gate structure are formed respectively and integrated so that the size of CMOS circuit is miniaturized.

The invention relates to the lithium ion battery field, in particular to a high-capacity cathode material and a high energy density lithium ion secondary battery prepared by the cathode material. The cathode material comprises a cathode active material, an adhesive and a conductive agent, wherein the cathode active material is a composite material of a lithium cobalt oxide active material A and a high nickel active material B; the high nickel active material B is pretreated before mixing; and the mass ratio of the high nickel active material B to the lithium cobalt oxide active material A is between 0.82 and 9. The cathode material can not only prepare the batteries with higher capacity and energy density but also solve the problem of high temperature gas production in the batteries.

The invention provides a preparation method of a manganese-based compound positive pole material for a secondary lithium ion battery. The general constitution formula of the positive pole material is Li (LixMn2-x-yMy) O4/Az, wherein x is more than or equal to 0 and less than or equal to 0.5, y is more than or equal to 0 and less than or equal to 2, and z is more than or equal to 0 and less than or equal to 0.5; and M is a doped modified element, and A is an oxide of a coating element or a phthalocyanines large-ring transition metal complex. When the positive pole material is prepared, a lithium source and an M source are added into mixing equipment containing a medium and a dispersing agent to be mixed and dried; then the mixture and a manganese source are added into the mixing equipment containing the medium and the dispersing agent to be mixed and dried; then the new mixture is roasted and then is cooled to a room temperature; and the new mixture and an A source are added into the mixing equipment containing the medium and the dispersing agent to be mixed and dried, are roasted again, are cooled to the room temperature and are mixed and crushed to obtain the manganese-based compound positive pole material. The preparation method disclosed by the invention has the advantages of simple process, low raw material cost and processing cost, simple process route, short period and low energy consumption. The produced manganese-based compound positive pole material has the advantages of high energy density, mass specific capacity, power performance, high-temperature circulating performance and high-temperature storage performance; and the capacity efficiency of the material is high at -40 DEG C.

The invention provides a lithium ion battery and a lithium-rich anode sheet. The lithium-rich anode sheet comprises: a current collector; and a diaphragm, which contains an active substance and is formed on the current collector, wherein the diaphragm and the current collector form an initial anode sheet. The current collector in the initial anode sheet is a porous current collector. The initial anode sheet is rich in lithium on one side, and the lithium rich amount matches the lithium supplement capacity needed by the initial anode sheet. The lithium ion battery includes: a cathode sheet; an anode sheet; an isolation membrane disposed between the cathode sheet and the anode sheet; and an electrolyte solution. The anode sheet is a lithium-rich anode sheet. The lithium-rich anode sheet of the lithium ion battery provided by the invention not only overcomes the excess lithium supplement problem in traditional lithium-rich anode sheets, and also can effectively control the lithium supplement amount of the anode so as to realize uniform lithium supplement and enhance the first coulombic efficiency of the lithium ion battery adopting the lithium-rich anode sheet. Thus, the energy density of the lithium ion battery is greatly improved, and the lithium ion battery can be ensured with better electrochemical properties.

Methods and systems for Airy waves and Airy wavepackets or Airy beam generation from an input beam or pulse. Airy wavefronts and Airy wavepackets can be generated using Airy beam generation through Fourier synthesis using phase masks or filters in the spatial domain; Airy beam generation using amplitude and phase filters in the spatial domain; and Airy pulse generation through Fourier synthesis using phase and/or amplitude filters in the temporal frequency domain. The Airy waves are highly asymmetric and as a result their energy is more tightly confined in one quadrant thus increasing the energy density in the main lobes. These wavepackets can be one, two, and three-dimensional waves. In addition they tend to self-heal themselves which is important in adverse environments.

The invention provides an alkali metal flow battery comprising a positive electrode current collector, a negative electrode, positive electrode slurry, a negative electrode electrolyte, a separation film, an encapsulation shell, a positive electrode slurry storage tank, and a negative electrode electrolyte storage tank. The positive electrode current collector, the negative electrode, the separation film, part of the positive electrode slurry, and part of the negative electrode electrolyte are accommodated in the encapsulation shell. The separation film is positioned between the positive electrode current collector and the negative electrode, and separates the positive electrode slurry and the negative electrode electrolyte. The positive electrode slurry comprises a positive electrode active material, a conductive agent, and positive electrode electrolyte. The negative electrode is an alkali metal electrode. The invention also provides the application of the alkali metal flow battery in large-scale electricity storage in solar power generation or wind power generation.

The invention discloses a preparation method of a lithium-enriched magnesium-based anode material of a lithium ion battery. The preparation method comprises the steps of: depositing cobalt manganese oxide by using an electrodeposition method, and dissolving the cobalt manganese oxide and lithium chloride in a mixed way to obtain lithium cobalt manganese oxide powder; dissolving the lithium cobalt manganese oxide powder and the lithium chloride in a mixed way and heating to obtain lithium-enriched lithium cobalt manganese oxide powder; adding the lithium-enriched lithium cobalt manganese oxide powder into an aqueous solution of aluminum chloride, and standing to obtain aluminum-hydroxide-cladded aluminum-enriched lithium cobalt manganese oxide; sintering to obtain an alumina-cladded lithium-enriched lithium cobalt manganese oxide material; and preparing the anode material. According to the invention, by adoption the alumina-cladded lithium cobalt manganese oxide material as an anode active substance, while higher energy density is achieved, phase change of the anode material and the dissolution loss of important metal are inhibited, and the anode material has good cyclic stability, and is high in specific capacity, good cyclic performance and long service life when applied to the lithium ion battery.

The present invention relates to electrodes for a lithium secondary battery with a high energy density and a secondary battery with a high energy density using the same. A negative electrode includes a material which can be alloyed with lithium alloy. A positive electrode is made of a transition metal oxide which can reversibly intercalate or deintercalate lithium. Here, the entire reversible lithium storage capacity of the positive electrode is greater than the capacity of lithium dischargeable from the positive electrode. Further, the present invention relates to electrodes for a lithium secondary battery in which metal lithium is coated on a negative electrode, a positive electrode, or both, a method of manufacturing the electrodes, and a lithium secondary battery including the electrodes. The lithium secondary battery of the present invention is excellent in safety because metal lithium does not remain after being activated and excellent in a capacity per unit weight.

The invention discloses a composite negative electrode, a preparation method of the negative electrode and a lithium-sulfur secondary battery with the negative electrode. The composite negative electrode comprises copper foil and a solid lithium ion conductive diaphragm tape, wherein one end of the copper foil is provided with a tab for conducting current, at least one side of the copper foil is closely provided with metal lithium foil or alloy lithium foil which is used as a battery negative electrode, and the solid lithium ion conductive diaphragm tape covers the battery negative electrode, so that the accumulation of lithium ions on a negative electrode lithium alloy surface and the short circuit, caused by lithium dendrites, between a positive electrode and the negative electrode of the battery can be prevented. In the manner, on the premise of maintaining high energy density, the safety performance of the lithium-sulfur battery can be improved. In addition, multi-element compound electrolyte is used for substituting for organic electrolyte, so that the dissolving and diffusion of sulfur in the electrolyte can be effectively prevented, and the cycling life of the battery can be greatly prolonged.

Provided is a quinone compound-graphene composite, comprising a quinone compound and graphene, wherein the quinone compound is bonded on the surface of the graphene, and the quinone compound is a quinone monomer or a quinone polymer. The quinone compound-graphene composite has a high energy density, high flexibility, a high electrical conductivity and high stability, and can be used as a positive electrode material for preparing a flexible electrode. Also provided are a method for preparing the composite, and a flexible lithium secondary battery using the material as a positive electrode active material.

A positive electrode mixture for nonaqueous batteries, is formed by adding 0.5 to 10 wt. parts of an organic acid per 100 wt. parts of an electroconductive additive, to a mixture of a composite metal oxide as a positive electrode active substance, a higher order-structured carbon black as the electroconductive additive, a binder of a fluorine-containing copolymer of at least three comonomers including vinylidene fluoride, tetrafluoroethylene and a flexibility-improving fluorine-containing monomer, and an organic solvent. Further, the mixture is applied on at least one side of an electroconductive sheet, and then dried and compressed to form a positive electrode mixture layer. As a result, it is possible to provide a positive electrode structure having a thick and sound positive electrode mixture layer of a high energy density.

The invention discloses a method for preparing a lithium cobalt oxide cathode material for a lithium ion battery. The preparation method comprises the following steps of: adding magnesium chloride into a cobalt nitrate solution, uniformly mixing the mixture, continuously pumping cobalt nitrate, magnesium chloride and an ammonium bicarbonate solution into pure water serving as a base solution in a parallel flow mode, performing precipitation reaction to obtain spherical cobalt carbonate with a magnesium (Mg)-doped solid solution; preparing spherical cobalt carbonate with an aluminum (Al)-doped solid solution by a similar method; adjusting the alkalinity of base solution, adding titanium dioxide (TiO2) and a surfactant into cobalt nitrate solution; reacting to form spherical cobalt carbonate with a titanium (Ti)-doped solid solution; roasting the spherical cobalt carbonate with the Mg-doped solid solution, the spherical cobalt carbonate with the Al-doped solid solution, the spherical cobalt carbonate with the Ti-doped solid solution and lithium carbonate to obtain the lithium cobalt oxides cathode material for the lithium ion battery. The cathode material prepared for the lithium ion battery has high energy density and high cycling stability; and the lithium ion battery employing the cathode material has high specific capacity, high cycling stability and long service life.

An electric and hybrid Vertical-Take Off and Landing (“VTOL”) aircraft is disclosed comprising a plurality of small Electric Ducted Fans (“EDFs”) of various sizes and orientations. The thrust of each fixed EDF is individually controlled by modulation of motor power by one or more onboard microcomputers connected to a plurality of onboard laser distance measuring sensors, at least three onboard three-axis accelerometers and at least one GPS thereby allowing extremely precise and safe VTOL operation. The aircraft may be employed to allow robotic and passenger vehicles to transition extremely quickly between normal linear flight and VTOL and tb operate in extreme and gusty conditions.

A negative active material for a rechargeable lithium battery may include a compound powder represented by the following formula 1

Li_xM_yV_zO_2+d  [Formula 1]

where 1≦x≦2.5, 0≦y≦0.5, 0.5≦z≦1.5, 0≦d≦0.5, and M is an element selected from Al, Cr, Mo, Ti, W, Zr, and combinations thereof. The compound powder may include a multi-faced particle that has a plurality of flattened parts on a particle surface at the plan view of the multi-faced particle. The multi-faced particle may have at least three ridgelines at a boundary between adjacent flattened parts. At least one of the ridgeline may be formed by adjacent flattened parts having an angle of at least 90°. A ratio of a length (L) of each ridgeline and the maximum diameter (R_max) of the multi-faced particle may be greater than 0.1.

The invention discloses a nutritious energy rod and its preparing process, wherein the rod is prepared from malt sugar 5-20%, levulose 5-20%, glucose 10-42%, oat powder 3-15%, soybean polypeptide 3-16%, fish protein small peptide 2-12%, fish bone meal 1-5%, cocoa powder 2-10%, onion 3-15%, sea-tangle 2-8%, vitamin 0. 3-3%, microelements 0. 1-2%, amino acid 0. 5-5%, taurine 0. 1-2%, choline 0. 05-1%, soybean lecithin 2-8%, DHA fish oil 3-12% and edible gelatin 1-8%.

The invention discloses a preparation method for a poplar catkin based biomass carbon/sulfur composite material. The preparation method comprises the following steps of (1) enabling pre-processed poplar catkin to be immersed in a potassium hydroxide solution to be stirred for 3-12h, and then drying the obtained material in a drying oven; (2) carrying out high-temperature thermal processing on dried alkalized poplar catkin in a tubular furnace at a temperature of 600-900 DEG C for 1-3h, then washing the processed poplar catkin by a diluted hydrochloric acid solution and water alternately until the poplar catkin is neutral; and next, drying the poplar catkin in the drying oven to obtain carbon micron tube powder; and (3) enabling the carbon micron tube powder to be fully mixed with elementary sulfur and then to be subjected to thermal processing in the tubular furnace to finally obtain the poplar catkin based biomass carbon/sulfur composite material. According to the preparation method, only the simple potassium hydroxide activation method and the thermal processing method are adopted, so that simple process and the commercialized operation can be realized; and meanwhile, the poplar catkin based biomass carbon/sulfur composite material is quite high in electrochemical property, and the initial discharge capacity of the composite material can reach 1200 mAh/g under the current density of 0.1C.

The invention discloses a double-source energy system of a battery electric vehicle. The double-source energy system comprises an energy management controller, a lithium battery management system, a super-capacitor management system, a lithium battery, a super-capacitor bank, a bidirectional DC/DC module, a unidirectional DC/DC module, a motor controller, a motor and the like, wherein the energy management controller is connected with the lithium battery management system, the super-capacitor management system, the bidirectional DC/DC module, the unidirectional DC/DC module and the motor controller, the lithium battery is connected with the lithium battery management system and the bidirectional DC/DC module, the bidirectional DC/DC module is connected with the motor controller and the unidirectional DC/DC module through a direct-current bus, the super-capacitor bank is connected with the super-capacitor management system, the super-capacitor bank is connected with the motor controller and the unidirectional DC/DC module, and the unidirectional DC/DC module is connected with an auxiliary power supply device. The double-source energy system of the battery electric vehicle is enhanced in load adaptability by combining high energy density of the lithium battery with high power density of super-capacitors.

The invention provides a rechargeable magnesium battery and a preparation method thereof. The rechargeable magnesium battery comprises a positive electrode tab, a negative electrode tab, an isolating membrane and an electrolyte, wherein the positive electrode tab comprises a positive current collector and a positive film; the positive film is arranged on the positive current collector and comprises a positive active material, a positive conductive agent and a positive binder; the negative electrode tab is magnesium metal foil or magnesium alloy foil; the isolating membrane is spaced between the positive electrode tab and the negative electrode tab; the positive active material is a Prussian blue compound with an open frame structure; and the electrolyte comprises a magnesium salt or a non-aqueous ether solvent. The rechargeable magnesium battery provided by the invention is high in working voltage, high in energy density, good in cycle performance, simple in production and preparation, low in cost, friendly to environment, safe and reliable.

The invention discloses a secondary battery, an application and a preparation method of a negative electrode of the secondary battery. The secondary battery comprises solid metal sodium or lithium or potassium, conductive liquid metal, a solid electrolyte, a positive electrode material and a battery shell, wherein the solid metal sodium or lithium or potassium and the conductive liquid metal are accommodated in a solid electrolyte tube formed by the solid electrolyte; or the part between the battery shell and the solid electrolyte is filled with the solid metal sodium or lithium or potassium and the conductive liquid metal; the solid metal sodium or lithium or potassium and the conductive liquid metal form a high-capacity negative electrode of the secondary battery; the part between the battery shell and the solid electrolyte is filled with the positive electrode material to form a positive electrode of the secondary battery; and the conductive liquid metal comprises a liquid generated by mixing any one or more of metal sodium, lithium and potassium and an aromatic compound and an ether solvent.

The invention discloses a power battery pack and an electric vehicle. The power battery pack comprises a pack body and a plurality of single batteries, wherein an accommodating space is defined in thepack body, the pack body is internally provided with at least one width direction cross beam or length direction cross beam, the width direction cross beam extends in the width direction of the powerbattery pack, and the length direction cross beam extends in the length direction of the power battery pack; the accommodating space is divided into a plurality of accommodating chambers by the widthdirection cross beam or length direction cross beam; and the plurality of single batteries are set in the pack body and directly arranged in the accommodating chambers, and each accommodating chamberis internally provided with at least one single battery so as to form a battery array. The power battery pack disclosed by the embodiment of the invention has the advantages of high space utilizationrate, high energy density, strong endurance, high reliability, low cost, high quality and the like.

A reversible fuel cell includes a positive electrode containing manganese dioxide, a negative electrode containing a hydrogen storage material, a separator disposed between the positive electrode and the negative electrode, and an electrolyte. Each of the negative electrode and the positive electrode is an electrode for power generation and is also an electrode that applies electrolysis to the electrolyte using electric current to be fed from the outside. This cell is capable of storing electric energy to be supplied at the time of overcharge by converting the electric energy into gas, and is also capable of reconverting the gas into electric energy in order to utilize the electric energy. Accordingly, there are provided a reversible fuel cell and a reversible fuel cell system each of which is excellent in energy utilization efficiency, energy density and load following capability.

The invention discloses lithium ion battery negative electrode conductive paste, and belongs to the field of lithium ion battery material manufacturing. The conductive paste comprises a thickening agent, a binding agent, a conductive agent, a defoaming agent, an active substance and a solvent, on the basis of 100% by mass of the conductive paste, the solid content accounts for 5-30%, and the massratio of the thickening agent, the binding agent, the defoaming agent and the active substance is (0.1-2.0):(0.5-15):(0.5-15):(0.1-5):(70-97.5). The conductive paste is an aqueous binding agent system, carboxymethyl cellulose is used as the thickening agent, and a silicon/silicon carbide/carbon compound is used as the active substance. Moreover, the invention also provides a preparation method ofthe conductive paste, a lithium ion battery negative electrode prepared by employing the conductive paste and a lithium ion battery. The half cell of the lithium ion battery, assembled by employing the negative electrode paste preparation method provided by the invention, has excellent cycle stability and initial coulombic efficiency.

The invention provides a preparation method for cathode paste of a high-capacity lithium ion battery. The preparation method for the paste comprises the following steps: 1) each component is dried firstly; 2) after drying, polyvinylidene fluoride and 1-methyl-2-pyrrolidinone are mixed in proportion and dispersed, and a glue solution A is obtained; 3) Super-p and KS-6 are added to the dispersed glue solution A, obtained mixed paste is stirred uniformly, ground and filtered, and paste B is obtained; 4) a lithium iron phosphate material is added to 60%-70% of the paste B in two times and stirred, and paste C is obtained; 5) after stirring, the residual paste B and 1-methyl-2-pyrrolidinone remaining in total quantity are added to the solution and stirred, and the final paste is obtained. Substances of the paste have good dispersity, a preparation process is simple, preparation of conductive glue and combination of the paste can be performed simultaneously, and the efficiency is increased; the obtained battery is high in energy density, good in safety performance and low in internal resistance, and exertion of the maximum capacity per gram of the lithium ion battery is facilitated.

A rechargeable alkali metal battery comprising: (A) an anode comprising an alkali metal layer and a dendrite penetration-resistant layer composed of multiple graphene sheets or platelets or exfoliated graphite flakes that are chemically bonded by a lithium- or sodium-containing species to form an integral layer that prevents dendrite penetration through the integral layer, wherein the lithium-containing species is selected from Li₂CO₃, Li₂O, Li₂C₂O₄, LiOH, LiX, ROCO₂Li, HCOLi, ROLi, (ROCO₂Li)₂, (CH₂OCO₂Li)₂, Li₂S, Li_xSO_y, Na₂CO₃, Na₂O, Na₂C₂O₄, NaOH, NaiX, ROCO₂Na, HCONa, RONa, (ROCO₂Na)₂, (CH₂OCO₂Na)₂, Na₂S, Na_x SO_y, or a combination thereof, wherein X═F, Cl, I, or Br, R=a hydrocarbon group, x=0-1, y=1-4; (B) a cathode comprising a cathode layer; and (C) a separator and electrolyte component in contact with the anode and the cathode; wherein the dendrite penetration-resistant layer is disposed between the alkali metal layer and the separator.

The invention discloses a preparation method of large-particle spherical cobaltosic oxide. The preparation method comprises the following steps: mixing a complexing agent with a reducing agent to prepare a mixed solution; stirring and mixing a cobalt salt solution, a precipitator solution and the mixed solution at a pH value of 9-12 at 40-70 degrees centigrade by a stirring speed of 700-1500 r/min to obtain a precursor; washing and filtering the precursor, then roasting at 500-800 degrees centigrade for 3-6 hours, and thus obtaining large-particle spherical cobaltosic oxide. Cobaltosic oxide prepared by the method disclosed by the invention has a high degree of sphericity as well as high particle diameter and high tap density, and cobaltosic oxide is suitable for manufacturing a lithium cobalt oxide electrode material, therefore, a lithium ion battery prepared from the lithium cobalt oxide electrode has large energy density and high performance.

A power storage device including a positive electrode in which a positive electrode active material is formed over a positive electrode current collector and a negative electrode which faces the positive electrode with an electrolyte interposed therebetween is provided. The positive electrode active material includes a first region which includes a compound containing lithium and one or more of manganese, cobalt, and nickel; and a second region which covers the first region and includes a compound containing lithium and iron. Since a superficial portion of the positive electrode active material includes the second region containing iron, an energy barrier when lithium is inserted into and extracted from the surface of the positive electrode active material can be decreased.