195results about How to "Relieve swelling" patented technology

A negative electrode active material for a lithium ion battery is provided. The active material includes a composite formed by connecting a carbon material and black phosphorus through C-P bonds. The carbon material and the black phosphorus in the active material form the C-P bonds, thus ensuring tight contact between the carbon material and the black phosphorus in charge-discharge processes, and avoiding bad contact with the carbon material and a current collector when the black phosphorus is expanded. In addition, the carbon material is high in flexibility so that expansion of the black phosphorus can be relieved in the aspect of volume. The invention also provides a preparing method of the active material. The method includes mixing the carbon material and the black phosphorus, and then subjecting the mixture to ball milling at a ball milling speed of 300-700 r / min for 10-20 h, wherein the carbon material and the black phosphorus are connected through the C-P bonds to form the composite, and then the active material is formed. The method is simple and easy to operate. The invention also provides a negative electrode plate of the lithium ion battery and the lithium ion battery. The lithium ion battery has extremely high energy density and long cyclic lifetime.

A multilayered material is provided that exhibits therapeutic effects for relieving the pain and swelling of various forms of arthritis (particularly osteoarthritis), delaying the onset of osteoarthritis, or preventing hypothermia or alleviating conditions caused by hypothermia. The flexible, breathable multilayered material includes a first layer of soft and hypoallergenic material (e.g., cotton, silk, linen), a second layer of soft, heat retentive material (e.g., wool, cashmere) contacting the first layer, and a third layer of water repellent material contacting the second layer. Additionally, the multilayered material provides a thin, flexible, breathable fabric that can be used to construct various garments, devices, and gears to combat harsh weather conditions.

The embodiment of the invention provides a charging method and device. For one thing, the charging process comprises a first charging stage and a second charging stage when a battery is charged in the embodiment; the first charging stage comprises at least two charging sub-stages; the battery is successively subjected to first constant current charging and second constant current charging in each charging sub-stage; and then the battery is subjected to constant voltage charging until the current of the battery reaches to a stop current in the second charging stage. Therefore, the technical scheme provided by the embodiment can solve the problems that the existing charging mode may result in accumulation of battery polarization and the battery has relatively big potential safety hazards along with the improvement of the charging speed.

The invention an alcohol-proof film and a film electrode, which can be directed, used in alcohol fuel battery and their preparing method, relating to the technique of fuel battery. Said alcohol-proof film is palladium film or palladium-base alloy film whose thickness of film is 0.05-50 micrometer, and the palladium amount of film is 70-100%. The structure of film electrode formed by alcohol-proof film is multi-layer, comprises anode diffuse layer, cathode diffuse layer, anode catalytic layer, cathode catalytic, electrolytic film and the alcohol-proof film, while the alcohol-proof film is arranged on the side of anode or the cathode, or be arranged between two Nafion electrolytic films. Said prepared film electrode has better property when charge-in at low temperature and high concentration, so it has much ascendant in the application for the self-contained portable breathing power at the indoor temperature. The electrode also can be used in sensor device and electrochemical device.

The embodiment of the invention relates to a lithium battery negative electrode material containing a pre-lithiated silylene material, a preparation method and a lithium battery. The negative electrode material has a core-shell structure, wherein an inner core is a mixture of the pre-lithiated silylene material and carbon particles, and an outer shell is one or more carbon-containing layers; the mass ratio of the inner core to the negative electrode material is [80%, 99%]; the mass ratio of the pre-lithiated silylene material in the inner core to the inner core is [10%, 90%]; the mass ratio ofthe outer shell to the negative electrode material [1%, 20%]; the pre-lithiated silylene material is of a sheet structure, and a phase comprises nano silicon and / or silicon oxide and lithium silicate; and the lithium silicate is one or more of Li4SiO4, Li2SiO5 and Li2SiO3. The negative electrode material effectively alleviates the expansion problem of the negative electrode material through the flaky characteristics of silylene or silylene oxide; by lithiating the silylene material in advance, the first charge-discharge efficiency of the negative electrode material is improved; and through carbon coating on the surface layer, the negative electrode material has the advantages of long cycle and high cycle stability.

The invention provides an active anode material, a preparation method thereof and a lithium ion battery. The active anode material comprises a core and a shell covering the outer surface of the core,wherein the core comprises an amorphous stannous pyrophosphate matrix as well as a silicon material and a carbon material which are dispersed in the amorphous stannous pyrophosphate matrix, and the shell is carbon. The preparation process is simple, and the anode active material has good cycle performance and excellent rate performance.

The invention relates to a silicon carbon composite material. The silicon carbon composite material comprises a nanometer silicon core and a porous carbon shell, wherein the porous carbon shell is coated outside the nanometer silicon core, the porous carbon shell wraps the nanometer silicon core in a form of three-dimensional layer sheet pedal-shaped amorphous carbon, and a gap is formed between the porous carbon shell and the nanometer silicon core. The silicon carbon composite material has excellent electrochemical performance when used as a battery negative electrode material; and comparedwith a silicon raw material negative electrode material, the specific capacity and the cycle property of the silicon carbon composite material are remarkably improved, the specific area and the conductivity of the material can be substantially improved by a three-dimensional layer sheet pedal-shaped porous structure of the material, the strength and the flexibility of the material are improved, and the expansion problem of the silicon negative electrode is effectively solved. The invention also comprises a preparation method of the silicon carbon composite material.