15 results about "Discharge potential" patented technology

The invention discloses an integrated positive electrode material, an oxide-based solid-state lithium-carbon dioxide battery and a preparation method. The integrated positive electrode material comprises a current collector, an active component and a lithium ion transmission medium, wherein the active component and the lithium ion transmission medium are loaded on the current collector; a high-conductivity carbon material is grown on the surface of the current collector in situ; the active component comprises an active element, and the active element is selected from at least one of copper, nickel, cobalt and iron; the lithium ion transmission medium comprises a lithium element. The solid-state lithium-carbon dioxide battery composed of the integrated positive electrode, the oxide solid-state electrolyte and the metal lithium negative electrode disclosed by the invention has the advantages of high discharge potential of 3.05 V, 260 circles of reversible stable charge-discharge cycles and the like at room temperature, and the greenhouse gas CO2 is efficiently utilized; the solid-state secondary battery is expected to be a novel solid-state secondary battery with high energy density and high safety.

This invention discloses a type of sodium titanate with a layered crystal structure, its preparation method, and its application in aqueous magnesium-ion batteries, belonging to the field of aqueous magnesium-ion battery technology. This invention uses sodium titanate with a layered crystal structure as the negative electrode material in aqueous magnesium-ion batteries. Due to its excellent chemical and structural stability, sodium titanate can achieve reversible magnesium deposition in aqueous magnesium electrolytes. 2+ Intercalation / extraction. This invention synthesizes Na via a hydrothermal method and a high-temperature annealing process. 2 Ti 2 O 5 And Na 2 Ti 3 O 7 Materials. In magnesium chloride electrolyte, both sodium titanate materials exhibit extremely low charge / discharge potentials (Na). 2 Ti 2 O 5 -1.3 to -0.6V vs. SCE; Na 2 Ti 3 O 7 (-1.5 to -1V vs. SCE) and good cycle stability. Furthermore, Na... 2 Ti 2 O 5 The half-cell exhibits a charge-discharge specific capacity of up to 213 mAh / g at a current density of 2 A / g, and maintains a high specific capacity of 150 mAh / g even at a high current density of 10 A / g. The sodium titanate of this invention is an ideal anode material for aqueous magnesium batteries, possessing both low cost and environmental friendliness, and shows great promise for application in the field of aqueous magnesium-ion energy storage.

The application discloses a method for characterizing lithium precipitation window by using battery polarization potential, and belongs to the technical field of lithium ion batteries. The method comprises the following steps: obtaining a standard charge-discharge potential curve through a discharged battery; setting different rates, and performing charge-discharge tests on a three-electrode battery at different rates to obtain positive and negative charge-discharge potential curves of the three-electrode battery at each rate; comparing the positive and negative charge-discharge potential curves of the three-electrode battery at each rate with the standard charge-discharge potential curve, and calculating the polarization potential of the three-electrode battery at each rate through the potential difference at the maximum deviation of the two curves; and disassembling the three-electrode battery to obtain the polarization potential and the charge-discharge rate when lithium precipitation starts. The main use of the application is to further reduce the risk of lithium precipitation of lithium ion batteries, utilize the correlation between battery lithium precipitation and polarization, utilize the polarization potential to characterize the lithium precipitation window, and predict the internal condition of the battery in advance, so that a more optimal charging strategy can be formulated, and the battery performance can be improved.

Disclosed is a lithium secondary battery. The lithium secondary battery includes a negative electrode having a discharge potential of 0 V or higher and 1.5 V or lower (vs Li / Li+), a residual negative electrode capacity of 2.5% or greater as defined by a specified formula, and a cut-off potential lower than a discharge potential.

The invention discloses a high-potential aluminum alloy anode material and a preparation method and application thereof, and belongs to the technical field of light metal functional materials. According to the aluminum alloy anode material, aluminum with the purity larger than 99.999% serves as a raw material, alloy elements are added, and the added alloy elements comprise, by mass, 0.3%-0.7% of Mg, 0.1%-0.15% of Ga, 0.05%-0.08% of Sn and 0.03%-0.07% of In; the mass percentage content of impurities is less than 0.01%; alloy elements are added in the form of magnesium-based binary intermediate alloy. According to the invention, modification research on an aluminum alloy anode material is carried out by adopting a microalloying mode, and a high-potential aluminum alloy electrode material is prepared through key processes such as smelting and casting of a microalloyed aluminum alloy electrode, ultra-thin cold pressing processing of the aluminum alloy electrode and multi-stage heat treatment of the aluminum alloy electrode; the prepared high-potential aluminum alloy anode material is high in electrochemical activity; processing is easy, cost is low, and pollution is avoided; the corrosion resistance is good; the hydrogen evolution rate is low, the discharge potential is stable and the electrode utilization rate is high.

Particular embodiments may provide an anode material, comprising a compound of formula Li2—X—Y, wherein: X and Y are each independently a metal atom or a metalloid atom; the anode material has a discharge potential of less than about 0.4 V vs. Li / Li+; and the molar ratio of Li:X:Y is 2:1:1.

Provided is a metal-air secondary battery which is capable of suppressing a decrease in discharge potential and an increase in overvoltage despite containing an air electrode catalyst for discharge, which is a carbon-based catalyst. This metal-air secondary battery is provided with: a comb-shaped air electrode layer for charging, which contains an air electrode catalyst for charging, a conductive material, and a binder; a comb-shaped air electrode layer for discharge, which contains an air electrode catalyst for discharge, which is a carbon-based catalyst, and a binder, and which is provided so as to be separated from and mesh with the comb-shaped air electrode layer for charge in the same plane; a metal negative electrode layer provided so as to face a composite air electrode layer comprising the air electrode layer for charging and the air electrode layer for discharging in the same plane; an electrolyte solution impregnated in the metal negative electrode layer; and a separator which is interposed between the composite air electrode layer and the metal negative electrode layer so as to be in contact with the composite air electrode layer, and which separates the composite air electrode layer from the metal negative electrode layer so as to enable hydroxide ion conduction.

This invention provides a lithium secondary battery with high energy density and excellent cycle characteristics. The invention relates to lithium secondary batteries, etc., wherein the lithium secondary battery comprises a positive electrode, a negative electrode without a negative electrode active material, a separator disposed between the positive and negative electrodes, and a fibrous or porous buffer layer with ion conductivity formed on the surface of the separator opposite to the negative electrode. The positive electrode comprises a positive electrode active material and a lithium-containing compound that undergoes oxidation within the charge / discharge potential range of the positive electrode active material but does not substantially undergo reduction. In the particle size distribution measured by laser diffraction scattering of the lithium-containing compound, the particle size D corresponding to 50% of the cumulative frequency is... 50 (S) is a particle size D corresponding to the 95% cumulative frequency of lithium-containing compounds, where 1.0 μm is greater than or equal to 20 μm. 95 (S) is 1.0μm or more and 30μm or less.

Many embodiments involve rechargeable battery assemblies that are forklift-battery-sized but that comprise multiple built in battery modules. A housing typically contains battery modules installed within the assembly as the assembly is typically symmetrical in configuration. Each battery module has an integrated battery supervisor system (BSS). A Battery Operating System Supervisor (BOSS) module processor serves as a battery management system for all the battery modules. The BOSS module grants permissions to battery modules to enable them to connect and disconnect from busbars at the appropriate times to prevent electrical issues. As a result of various combined features, many embodiments are able to optimize cycle-to-cycle discharge potential of the overall assembly through the use and control of one or more solid state relays associated with each module and that are controlled to connect or isolate the cells of the module from the larger assembly, particularly to isolate the cells if the module is discharged to or below a minimum charge threshold for that particular module.

The invention discloses a potassium ion battery active material and application thereof, and belongs to the technical field of battery materials, the chemical formula of the potassium ion battery active material is KRxV1-xPO4F, X is more than 0 and less than or equal to 0.5, and R is doped metal and is selected from one or more of Mg, Al, Mn, Fe, Ti, Cr, Cu, Zn, Ni and Co. Compared with the traditional KVPO4F, the KRxV1-xPO4F potassium ion battery active material disclosed by the invention has the advantages of more stable charge-discharge potential platform, smaller polarization, higher charge-discharge coulombic efficiency, more excellent cycle and rate performance and the like.

The invention discloses a negative electrode material as well as a preparation method and application thereof. The negative electrode material for a lithium battery, which contains Bi < x > Ti < y > O < z > and / or Li Bi TicO < z >, can have relatively proper discharge potential (so that the whole battery has relatively low lithium precipitation risk and relatively high specific energy) and relatively high specific capacity when being applied to the lithium battery; particularly, the invention innovatively proposes that BixTiyOz and / or LiaBibTicOz are / is combined with the silicon-based material, unexpected better power / rate characteristics can be obtained, the silicon-based negative electrode material is endowed with excellent electrochemical characteristics under high current (high power), and the silicon-based negative electrode material has potential and advantages of application as a large energy storage system, a power battery and the like.

The present application relates to the field of lithium ion battery module detection, and discloses a kind of lithium ion battery module in micro short circuit fast identification method, comprising: standard battery module is discharged to empty electricity state;Standard battery module is charged with first system, and the total voltage of standard battery module is obtained, and the charging potential of each single cell;Standard battery module is discharged with second system, and the total voltage of standard battery module is obtained, and the discharge potential of each single cell;According to the total voltage of standard battery module, the charging potential of each single cell, the total voltage of discharge and the discharge potential of each single cell, calculate reference voltage;The value of the voltage of the battery module to be measured is compared with the value of reference voltage to obtain the voltage difference value, and the preset threshold value is compared to determine whether the battery module to be measured appears internal micro short circuit signal.The present application can quantitatively analyze the degree of internal micro short circuit in battery module, and the test method is simple and accurate.

Many embodiments involve rechargeable battery assemblies that are forklift-battery-sized but that comprise multiple built in battery modules. A housing typically contains battery modules installed within the assembly as the assembly is typically symmetrical in configuration. Each battery module has an integrated battery supervisor system (BSS). A Battery Operating System Supervisor (BOSS) module processor serves as a battery management system for all the battery modules. The BOSS module grants permissions to battery modules to enable them to connect and disconnect from busbars at the appropriate times to prevent electrical issues. As a result of various combined features, many embodiments are able to optimize cycle-to-cycle discharge potential of the overall assembly through the use and control of one or more solid state relays associated with each module and that are controlled to connect or isolate the cells of the module from the larger assembly, particularly to isolate the cells if the module is discharged to or below a minimum charge threshold for that particular module.

A metal-air secondary battery is provided that is capable of suppressing a drop in discharge potential and a rise in overvoltage, despite containing a discharge air electrode catalyst that is a carbon-based catalyst. The metal-air secondary battery comprises a comb-shaped charging air electrode layer containing a charging air electrode catalyst, an electrically conductive material, and a binder; a comb-shaped discharging air electrode layer containing a discharge air electrode catalyst that is a carbon-based catalyst and a binder, spaced apart from and interlocked with the comb-shaped charging air electrode layer in the same plane; and a metal negative electrode layer arranged opposite an air electrode composite layer, which is composed of the charging air electrode layer and the discharging air electrode layer in the same plane.an electrolyte solution impregnated into the metal negative electrode layer, and a separator arranged between the air electrode composite layer and the metal negative electrode layer, such that it is in contact with the air electrode composite layer and isolates the air electrode composite layer from the metal negative electrode layer in a manner that allows hydroxide ions to be conducted between the air electrode composite layer and the metal negative electrode layer.

This invention provides a separate seawater discharge potential energy recovery and power generation system, including a seawater discharge pipe, a potential energy recovery pipe, a potential energy conversion component, a first valve, and a controller. Both the seawater discharge pipe and the potential energy recovery pipe are connected to an offshore platform. The seawater discharge pipe is arranged horizontally, and the potential energy recovery pipe is arranged vertically below the seawater discharge pipe. A first bypass port with a downward opening is provided on the seawater discharge pipe, located directly above the top opening of the potential energy recovery pipe. The potential energy conversion component is disposed inside the potential energy recovery pipe and is used to convert the potential energy of the seawater into electrical energy. The first valve is located at the first bypass port, and the controller is used to control the opening and closing of the first valve. In this separate seawater discharge potential energy recovery and power generation system, the seawater discharge pipe and the potential energy recovery pipe are separately arranged, and the addition of the potential energy conversion component will not affect the normal seawater discharge operation of the seawater discharge pipe.