Abstract: The application provides a negative electrode active material and a preparation method thereof, wherein the negative electrode active material comprises: porous core, comprising a base material and a boron-containing substance dispersed in the base material, wherein the base material comprises silicon and MSiO3, where M represents metal; pores of the porous core are filled with a silicon compound, and the silicon compound does not fully fill the pore. The negative electrode active material and the preparation method thereof have good material stability while ensuring high gram capacity and initial charge-discharge efficiency, and the lithium-ion battery made of it as a negative electrode has excellent fast charge and cycle characteristics, and may also reduce the expansion of the battery during the cycle.

Abstract: The application provides a spherical silicon-based lithium storage material and a preparation method thereof, wherein the preparation method comprises: providing a spherical matrix with a layered stacking structure; providing a spherical matrix with a layered stacking structure; performing different activation treatment steps to the spherical matrix by adopting an activation agent, and forming carbonaceous substance in pore channels formed by each activation treatment step; and forming silicon-containing substance in the pore channels after the different activation treatment steps and the carbonaceous substance is formed.

Abstract: Provided is a hot melt adhesive for insulating glass spacer, prepared from raw materials comprising the following components: 1-10 parts by weight of butyl rubber, 25-50 parts by weight of a polyisobutylene mixture; 5-15 parts by weight of a tackifying resin; 1-15 parts by weight of a tackifier; 5-15 parts by weight of a polymer; 0.1-1 part by weight of a lubricant; 0.1-1 part by weight of an antioxidant; 15-50 parts by weight of a filler; 1-10 parts by weight of a water absorbent; and 5-25 parts by weight of carbon black. Compared with the prior art, in the hot melt adhesive for insulating glass spacer provided in the present disclosure, components with specific contents are used, such that relatively good overall interaction is achieved, the thixotropy of the product is good, and the adhesion to both silicone sealant and glass is excellent.

Abstract: A silicon-based anode material for secondary batteries, a preparation method thereof and a secondary battery are provided. The silicon-based anode material includes: an inner core including an Si particle and silicon oxide SiOx1, where 0<x1<2, a first shell layer including a compound of the general formula MySiOz (0<y?4, 0<z?5, and z?x1) and a C particle, wherein the first shell layer covers the inner core, and the contents of M and C in the first shell layer gradually increase from a side thereof close to the inner core to another side thereof far away from the inner core; and a second shell layer including a carbon film layer or a composite film layer formed by a carbon film layer and a conductive additive, the second shell layer covers the first shell layer. The first charge-discharge cycle capability of the silicon-based anode material is improved, and the manufacturing cost is reduced.

Abstract: The application provides a porous negative electrode active material and a preparation method thereof, wherein the porous negative electrode active material includes: a first structure including 0-4 valence silicon elements and metal doping elements, wherein the mass percentage of the silicon elements is not less than 40%, and the mass percentage of the metal doping elements is 1%-15%; the first structure includes a porous structure, and the porous structure includes micropores with a pore diameter of less than 2 nm and mesopores with a pore diameter of 2 nm-50 nm; the first structure further includes silicon grains, and the size of the silicon grains is no more than 10 nm; the adsorption-desorption curve of the porous negative electrode active material has a hysteresis loop, the relative pressure corresponding to the hysteresis loop is 0.4-1, and the adsorption capacity is 5 cm3/g-25 cm3/g.

Abstract: A silicon-based anode material for secondary batteries, a preparation method thereof and a secondary battery are provided. The silicon-based anode material includes: an inner core including an Si particle and silicon oxide SiOx1, where 0<x1<2, a first shell layer including a compound of the general formula MySiOz (0<y?4, 0<z?5, and z?x1) and a C particle, wherein the first shell layer covers the inner core, and the contents of M and C in the first shell layer gradually increase from a side thereof close to the inner core to another side thereof far away from the inner core; and a second shell layer including a carbon film layer or a composite film layer formed by a carbon film layer and a conductive additive, the second shell layer covers the first shell layer. The first charge-discharge cycle capability of the silicon-based anode material is improved, and the manufacturing cost is reduced.

Abstract: A silicon-based anode material for secondary batteries, a preparation method thereof and a secondary battery are provided. The silicon-based anode material includes: an inner core including an Si particle and silicon oxide SiOx1, where 0<x1<2, a first shell layer including a compound of the general formula MySiOz (0<y?4, 0<z?5, and z?x1) and a C particle, wherein the first shell layer covers the inner core, and the contents of M and C in the first shell layer gradually increase from a side thereof close to the inner core to another side thereof far away from the inner core; and a second shell layer including a carbon film layer or a composite film layer formed by a carbon film layer and a conductive additive, the second shell layer covers the first shell layer. The first charge-discharge cycle capability of the silicon-based anode material is improved, and the manufacturing cost is reduced.

Abstract: The application provides a silicon-based lithium storage material and a preparation method thereof, wherein the silicon-based lithium storage material includes: an inner core, including silicon elements with a valence of 0-4; a first shell layer coating or partially coating the inner core, the first shell layer comprises a fluorocarbon layer, and the fluorocarbon layer comprises a fluorocarbon. According to the technical scheme of the present application, the silicon-based lithium storage material may improve the characteristics of the silicon-based lithium storage material as an active material of a lithium ion secondary battery under high-temperature storage conditions, and simultaneously improve the cycle characteristics and initial charge-discharge coulombic efficiency of the secondary battery.

Abstract: Provided is a hot melt adhesive for insulating glass spacer, prepared from raw meterials comprising the following components: 1-10 parts by weight of butyl rubber, 25-50 parts by weight of a polyisobutylene mixture; 5-15 parts by weight of a tackifying resin; 1-15 parts by weight of a tackifier; 5-15 parts by weight of a polymer; 0.1-1 part by weight of a lubricant; 0.1-1 part by weight of an antioxidant; 15-50 parts by weight of a filler; 1-10 parts by weight of a water absorbent; and 5-25 parts by weight of carbon black. Compared with the prior art, in the hot melt adhesive for insulating glass spacer provided in the present disclosure, components with specific contents are used, such that relatively good overall interaction is achieved, the thixotropy of the product is good, and the adhesion to both silicone sealant and glass is excellent.

Abstract: A silicon-based anode material, a preparation method thereof and a lithium ion battery are provided. The preparation method of the silicon-based anode material includes: passing a silicon substrate material through a vapor deposition gas to coat the surface of the silicon substrate material with a carbon deposition layer, the vapor deposition gas includes a first carbon source gas and a second carbon source gas, the volume percentage of the first carbon source gas and the second carbon source gas in the vapor deposition gas increases or decreases at different reaction stages for forming the carbon deposition layer. The side of the carbon deposited layer close to the silicon base material is more or less dense than the other side of the carbon deposited layer. The coating layer on the surface of the silicon-based anode material has a continuously changing junction, thereby greatly improving the cycling stability of the material.

Abstract: A silicon-based anode material, a preparation method thereof and a lithium ion battery are provided. The preparation method of the silicon-based anode material includes: passing a silicon substrate material through a vapor deposition gas to coat the surface of the silicon substrate material with a carbon deposition layer, the vapor deposition gas includes a first carbon source gas and a second carbon source gas, the volume percentage of the first carbon source gas and the second carbon source gas in the vapor deposition gas increases or decreases at different reaction stages for forming the carbon deposition layer. The side of the carbon deposited layer close to the silicon base material is more or less dense than the other side of the carbon deposited layer. The coating layer on the surface of the silicon-based anode material has a continuously changing junction, thereby greatly improving the cycling stability of the material.

Abstract: A silicon-based anode material for secondary batteries, a preparation method thereof and a secondary battery are provided. The silicon-based anode material includes: an inner core including an Si particle and silicon oxide SiOx1, where 0<x1 <2, a first shell layer including a compound of the general formula MySiOz (0<y?4, 0<z?5, and z?x1) and a C particle, wherein the first shell layer covers the inner core, and the contents of M and C in the first shell layer gradually increase from a side thereof close to the inner core to another side thereof far away from the inner core; and a second shell layer including a carbon film layer or a composite film layer formed by a carbon film layer and a conductive additive, the second shell layer covers the first shell layer. The first charge-discharge cycle capability of the silicon-based anode material is improved, and the manufacturing cost is reduced.