A method for preparing an ordered cross-stacked metal oxide nanowire array is provided. The method includes the following steps: conducting synthesis by using an amphiphilic diblock copolymer as a structure directing agent, tetrahydrofuran (THF) as a solvent and polyoxometalates (POMs) as an inorganic precursor, where the diblock copolymer can interact with POMs via an electrostatic force to form a core-shell cylindrical micelle in the solvent, which self-assembles to form an ordered multilayer-crossed organic-inorganic composite nanostructure during an evaporation process; the template is removed by calcination in air, thereby obtaining ordered and crossed metal oxide nanowires with various elements doping. The nanowire array material has a high specific surface area, a high crystallinity, and realizes uniform doping of heteroatoms.

A method for preparing two-dimensional (2D) ordered mesoporous nanosheets by inorganic salt interface-induced assembly includes the following steps: carrying out, by using a soluble inorganic salt as a substrate and an amphiphilic block copolymer as a template, uniform mass diffusion of a target precursor solution at an inorganic salt crystal interface through vacuum filtration or low-speed centrifugation; forming a single-layer ordered mesoporous structure by using the solvent evaporation-induced co-assembly (EICA) technology; and promoting, through gradient temperature-controlled Ostwald ripening, the evaporation and induced formation of an organic solvent, and removing the template in N2 to obtain a 2D single-layer ordered mesoporous nanosheet material. The assembled nanosheet material has a large pore size, regular spherical pores and orderly arrangement. By changing the type of the precursor, a variety of mesoporous metal oxides, metal elements, inorganic non-metal nanosheets are synthesized.

A method for preparing two-dimensional (2D) ordered mesoporous nanosheets by inorganic salt interface-induced assembly includes the following steps: carrying out, by using a soluble inorganic salt as a substrate and an amphiphilic block copolymer as a template, uniform mass diffusion of a target precursor solution at an inorganic salt crystal interface through vacuum filtration or low-speed centrifugation; forming a single-layer ordered mesoporous structure by using the solvent evaporation-induced co-assembly (EICA) technology; and promoting, through gradient temperature-controlled Ostwald ripening, the evaporation and induced formation of an organic solvent, and removing the template in N2 to obtain a 2D single-layer ordered mesoporous nanosheet material. The assembled nanosheet material has a large pore size, regular spherical pores and orderly arrangement. By changing the type of the precursor, a variety of mesoporous metal oxides, metal elements, inorganic non-metal nanosheets are synthesized.

The invention relates to an adhesive strip which can be detached substantially on the adhesion plane in a residue-free and nondestructive manner by stretching, said strip consisting of one or more adhesive material layers and optionally one or more intermediate carrier layers, at least one of the adhesive materials layers containing at least one filler, the primary particles of which can be individually separated, wherein the primary particles (i) are substantially spherical and (ii) have an average diameter d(0.5) of less than 10 μm, and the ratio of the average diameter d(0.5) of the primary particles to the thickness of the adhesive material layer in which the primary particles are contained is less than 1:2. The invention also relates to the production and use of said adhesive strip.

An anode material includes silicon-containing particles including a silicon composite substrate and a polymer layer, the polymer layer coats at least a portion of the silicon composite substrate, wherein the polymer layer includes a carbon material. The anode material has good cycle performance, and the battery prepared with the anode material has better rate performance and lower expansion rate.

Disclosed are a silicon-carbon composite material for a secondary lithium battery and a preparation method therefor. The silicon-carbon composite material for a secondary lithium battery comprises a core containing a silicon-based material, a first coating layer, and a second coating layer. The first coating layer is an electrically conductive layer, the second coating layer is an ion-conducting layer, and the first coating layer and the second coating layer are not limited to a certain order. In the silicon-carbon composite material provided by the present disclosure, the coating layer is a composite material, which combines the electroconductive (or ion-conducting) capability of a matrix material, and the reinforcing and toughening properties of a reinforcing phase, such that the material has a strong anti-expansion capability. In the secondary battery, the coating layer is less prone to breaking, which results in less fresh surface and so reduces the consumption of an electrolyte and improves the cycle performance of the battery. Additionally, the preparation method of the present disclosure is simple and easy to implement, and is suitable for large-scale industrial production.

A Si-containing film forming composition comprising a catalyst and/or a polysilane and a N—H free, C-free, and Si-rich perhydropolysilazane having a molecular weight ranging from approximately 332 dalton to approximately 100,000 dalton and comprising N—H free repeating units having the formula [—N(SiH3)x(SiH2-)y], wherein x=0, 1, or 2 and y=0, 1, or 2 with x+y=2; and x=0, 1 or 2 and y=1, 2, or 3 with x+y=3. Also disclosed are synthesis methods and applications for using the same.

This application belongs to the field of energy storage technology, and specifically discloses a negative active material including SiO.sub.x particles and a modified polymer coating layer covering the SiO.sub.x particles, in which 0<x<2; wherein the negative active material has a peak intensity I.sub.1 at the Raman shift ranging from 280 cm.sup.−1 to 345 cm.sup.−1, a peak intensity 12 at the Raman shift ranging from 450 cm.sup.−1 to 530 cm.sup.−1, and a peak intensity 13 at the Raman shift ranging from 900 cm.sup.−1 to 960 cm.sup.−1, and I.sub.1, I.sub.2 and I.sub.3 satisfy 0.1≤I.sub.1/I.sub.2≤0.6, and 0.2≤I.sub.3/I.sub.2≤1.0. This application also discloses a method for preparing a negative active material and related secondary batteries, battery modules, battery packs and apparatus.

The present application provides a silicon-based negative electrode material and a preparation method and use thereof. The silicon-based negative electrode material has a lithium borate coating layer on its surface, which may improve first charge-discharge efficiency of the material. There is a strong chemical bond interaction between the lithium borate coating layer and the borate ester having a specific structure, which may improve the rate capability of the battery. Furthermore, the borate ester has a structure of —(CH.sub.2CH.sub.2O).sub.n—CO—CR.sub.0═CH.sub.2, and the negative plate prepared with the silicon-based negative electrode material will undergo a cross-linking reaction during a high-temperature baking of the plate, so that a cross-linking is formed among particles of the silicon-based negative electrode material, thereby effectively ensuring the structural integrity of the silicon-based negative electrode plate during recycling, and improving the cycle performance of the battery.

The present application provides a silicon-based negative electrode material and a preparation method and use thereof. The silicon-based negative electrode material has a lithium borate coating layer on its surface, which may improve first charge-discharge efficiency of the material. There is a strong chemical bond interaction between the lithium borate coating layer and the borate ester having a specific structure, which may improve the rate capability of the battery. Furthermore, the borate ester has a structure of —(CH.sub.2CH.sub.2O).sub.n—CO—CR.sub.0═CH.sub.2, and the negative plate prepared with the silicon-based negative electrode material will undergo a cross-linking reaction during a high-temperature baking of the plate, so that a cross-linking is formed among particles of the silicon-based negative electrode material, thereby effectively ensuring the structural integrity of the silicon-based negative electrode plate during recycling, and improving the cycle performance of the battery.