7results about How to "Volume expansion" patented technology

The invention discloses an expanded microcrystalline graphite / Fe2O3 / SnO2 lithium ion battery micro-nano negative electrode material as well as a preparation method and application thereof, and relates to the technical field of new material preparation and new energy. Comprising the following steps: by taking high-purity microcrystalline graphite as a raw material, preparing expanded microcrystalline graphite by adopting an oxidation method and an inert atmosphere heat treatment method, then preparing an expanded microcrystalline graphite / Fe2O3 composite material by adopting a water bath method and an air atmosphere heat treatment method I, and then preparing the expanded microcrystalline graphite / Fe2O3 / SnO2 composite material by adopting a hydrothermal method and the air atmosphere heat treatment method I for the negative electrode of the lithium ion battery. The ternary composite material has the first specific discharge capacity of 1539.9 mAh / g under the current density of 0.1 A / g, the first coulombic efficiency is 70.1%, and the ternary composite material still has the specific discharge capacity of 1003.2 mAh / g after 100 cycles. The expansion effect of the high-purity microcrystalline graphite is remarkable, the lithium storage capacity and the cycling stability of the lithium ion battery negative electrode material are remarkably improved by selecting and adding the nano metal oxide, and a new thought and a new method are provided for developing the high-performance lithium ion battery negative electrode material.

The invention discloses a positive electrode material, a secondary battery and an electric device, and belongs to the technical field of batteries. The positive electrode material provided by the invention comprises a hollow graphene roll and lithium manganese iron phosphate, wherein the lithium manganese iron phosphate is dispersed in the hollow graphene roll. The positive electrode material provided by the invention has excellent electronic and ionic conductivity; when the composite material is used for preparing a secondary battery, the obtained secondary battery has good high and low temperature cycle performance, high temperature storage stability, relatively low internal resistance and relatively low cycle gas production.

The utility model relates to the technical field of injection molding machine control boxes, in particular to a waterproof injection molding machine control box, which comprises a control box body, a box cover, a display and a control element, the front side of the control box body is provided with the box cover, the box cover is rotatably connected with the control box body, and the front side of the box cover is provided with the display. A control element is installed in the control box body, a ventilation opening is formed in the side edge of the control box body, a waterproof protection mechanism is arranged on the inner side of the ventilation opening and located in the control box body, and a fixing frame is fixed to the front side of the control box body and located on the inner side of the control box body. According to the waterproof injection molding machine control box, the sealing air bag is arranged in the control box body to seal the connection between the control box body and the box cover, so that the sealing effect after the box cover is closed is ensured, water is prevented from entering the control box body, and the use safety of control elements in the control box body is ensured.

The invention relates to the field of pre-branch cables, and discloses an anti-bending waterproof anti-slip pre-branch cable and a processing method, the anti-bending waterproof anti-slip pre-branch cable comprises a main cable, a branch cable and a branch body, the main cable comprises a main cable conductor and a main cable insulating layer, and the branch cable comprises a branch cable conductor and a branch cable insulating layer. The branch cable conductor is connected with the main cable conductor in the branch body, main cable insulating layers at the two ends of the main cable in the branch body are provided with trapezoidal ring grooves, the branch cable insulating layer of the branch cable in the branch body is also provided with trapezoidal ring grooves, and water swelling layers are wound in the trapezoidal ring grooves. Each branch body comprises a trapezoid ring rib which is embedded into and fills the trapezoid ring groove. According to the invention, the problems that a gap is formed between the pre-branch body and the cable when the branch body part of the existing pre-branch cable is bent and stressed, water enters the branch body from the gap between the conductor and the branch body in a water environment, and an electric leakage accident is easily caused can be solved.

The invention discloses a sewage tank and cleaning equipment. The sewage tank comprises a tank body, a partition plate and a cover body, the box body is provided with a sewage cavity, a sewage inlet and an opening, and the sewage inlet and the opening are both communicated with the sewage cavity; the partition plate is located in the sewage cavity and connected with the box body, the partition plate divides the sewage cavity into a first cavity body and a second cavity body, and the sewage inlet is communicated with the first cavity body; the cover body covers the opening, the cover body is provided with a filtering hole, an air outlet and a first liquid outlet, the air outlet and the first liquid outlet are communicated with the filtering hole, the filtering hole is communicated with the first cavity, and the first liquid outlet is communicated with the second cavity. Sewage and solid garbage in the dirt can be stored in the first cavity and the second cavity respectively, so that the sewage and the solid garbage can be stored separately, and the situation that the solid garbage and the sewage are mixed and fermented to generate strong peculiar smell can be prevented.

This invention provides a type of glass and its preparation method, belonging to the field of glass technology. The glass batch comprises the following raw materials in parts by weight: 679-713 parts silica sand, 4-40 parts feldspar, 39-59 parts wollastonite, 129-154 parts dolomite, 42-55 parts limestone, 224-231 parts soda ash, 8-10 parts sodium sulfate, and 0.3-0.4 parts carbon powder. This invention can reduce CO2 emissions from float glass production, decrease bubble defects, and improve the quality of the finished glass.

The invention provides a surface modified cellulose fiber and a preparation method thereof, and the preparation method comprises the following steps: immersing cellulose fiber in an ionic solvent, and activating at an activation temperature of 40-60 DEG C for 10-30 min to obtain activated cellulose fiber; immersing the activated cellulose fibers into a vinyl ester modification reagent, and reacting at the reaction temperature of 40-60 DEG C for 1-3 hours to obtain grafted cellulose fibers; the grafted cellulose fiber is transferred into an anti-solvent to be fully washed and dried, the surface modified cellulose fiber is obtained, the surface modified cellulose fiber comprises a porous skin layer and a core layer from outside to inside, and a pore channel structure extending inwards from the surface is formed in the porous skin layer; hydroxyl of a cellulose molecular chain of the porous skin layer is grafted with acetyl, so that high-strength mechanical property retention and efficient functional grafting performance are achieved.