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255results about How to "Inhibition of rupture" patented technology

Doped multi-layer core-shell silicon-based composite material for lithium ion battery and preparation method thereof

ActiveCN109599551AInhibits and buffers swellingPrevent partial failureMaterial nanotechnologySecondary cellsCarbon filmComposite film
The present invention relates to a doped multi-layer core-shell silicon-based composite material for a lithium ion battery, and a preparation method thereof. Other than being doped with a necessary lithium element, the material is also doped with at least a non-metallic element and a metal element; the material has a structure in which a silicon oxide particle doped with elements is taken as a core, and a multilayer composite film which is tightly coated on the surface of the core particle is taken as a shell; the core particle contains uniformly dispersed monoplasmatic silicon nanoparticles,the content of doping elements gradually decreases from the outside to the inside without a clear interface, and a dense lithium silicate compound is formed on the surface of the core particle by embedding and doping the lithium element; and the multilayer composite film is a carbon film layer and a doped composite film layer composed of the carbon film layer and other elemental components. The doped multi-layer core-shell silicon-based composite material provided by the present invention has a high capacity, good rate performance, high coulombic efficiency, good cycle performance, a low expansion rate, and other electrochemical characteristics when the material is used for the negative electrode of lithium ion battery.
Owner:BERZELIUS (NANJING) CO LTD +1

Integral rigid runner droplet digital PCR system and method

The invention relates to an integral rigid runner droplet digital PCR system. The system comprises a power device, a droplet generation device, a rigid thermal circulation runner, a thermal circulation temperature control module, a fluorescent detection controller and a PC control module. A rigid thermal circulation pipeline has high heat conducting performance, and a rigid wall surface has low roughness and small relative deformation. The integral rigid runner droplet digital PCR system can be used for online detecting a droplet in real time by adopting the droplet generation device with a high loading capacity and a terminal fluorescent detection system, and has the characteristics of flexible temperature control, safety, no need of a special PCR reaction chip, high fluorescent detection flux, high sensitivity and the like; and the system can avoid the problems of measurement accuracy reduction and the like caused by droplet breakage and mutual fusion among droplets since the traditional droplet digital PCR equipment needs to manually transfer droplets in different reaction modules. The whole system forms a highly-integrated design by droplet generation, PCR reaction thermal circulation and terminal droplet fluorescent real-time online detection.
Owner:UNIV OF SCI & TECH OF CHINA

Porous silicon composite negative electrode material and preparation method thereof

The invention provides a porous silicon composite negative electrode material including a porous silicon substrate, a first conductive material layer composited on the surface of the porous silicon substrate, and a nano silicon-based material composited on the surface of the first conductive material layer. Firstly, a conductive material is coated for a first time, then the surface of the conductive material layer continues to be composited with the nano silicon-based material, and the porous silicon composite negative electrode material is obtained; the relatively high first charge/discharge efficiency of the porous silicon material is used, the conductive material coating the surface of the porous silicon material can increase the electrical conductivity of the composite material, can inhibit the porous silicon material from expanding outward to prevent rupture, and improves the cycle stability; after the surface is composited with the nano silicon-based material, better cycle performance is achieved, and the cycle performance of the porous silicon material composite material can be improved; and in addition, the preparation method has the advantages of simple operation, safety, high universality and low costs of production and is suitable for industrialized production.
Owner:宁波富理电池材料科技有限公司

Large-diameter corrugated pipe vibration forming device and method

ActiveCN106040811AReduce deformation resistanceInhibits pipe wrinkling and crackingEngineeringHigh frequency vibration
The invention discloses a large-diameter corrugated pipe vibration forming device and a method. The forming device mainly consists of a mandrel, a corrugated core mold, a connecting disc, forming wheels, a support frame and a vibrating device. The corrugated core mold coats the mandrel, and is connected with a flange at the bottom of the mandrel and the connecting disc at the end part to form an integral mold. A pipe blank coats the outer surface of the corrugated core mold; left and right end clamping jaws are arranged at the two end parts of the pipe blank; and the forming wheels are distributed on the outer side of the pipe blank. After the clamping jaws clamp the pipe blank, the pipe blank rotates around the axis, the vibration excitation is applied to the forming wheels, and the forming wheels radially and axially feed the pipe blank. All traditional forming processes are synthesized; the friction force between the metal pipe blank and the forming mold is effectively reduced by a vibration exciting device; and when high-frequency vibration excitation is applied, the deformation resistance of the metal pipe blank can be reduced, the corrugation and breakage generation and development of the pipe blank are inhibited, the size precision of large-wave high corrugated pipes is guaranteed, and the surface smoothness of formed workpieces is increased.
Owner:YANSHAN UNIV

Passive containment cooling system provided with heat pipe liquid guide devices

The invention provides a passive containment cooling system provided with heat pipe liquid guide devices. The system comprises an inner containment, an outer containment, a cooling device arranged at the top of the outer containment, the heat pipe liquid guide devices arranged on the inner containment as well as a guiding device which is arranged between the inner containment and the outer containment and used for guiding air circulation; a cooling agent is sprayed on the inner containment from the top, and a liquid film is formed. By means of the heat pipe liquid guide devices, on one hand, breakage of the liquid film can be inhibited, the heat exchange efficiency between the liquid film and air is improved, and heat on the surface of the inner containment is discharged out of the inner containment; on the other hand, heat on containment surface which is not covered with the liquid film can be guided into heat exchange space between the inner containment and the outer containment and finally discharged out of the outer containment. The passive containment cooling system provided with the heat pipe liquid guide devices has the characteristics of high-efficiency heat exchange, safety, reliability, wide application range and the like.
Owner:NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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