A method for manufacturing an electrode comprising a polymer matrix trapping an electrolyte, the method comprising the following steps: a) a step of preparing a composition comprising the ingredients intended to be included in the constitution of the electrode; b) a step of forming the electrode, from the composition, on a support; wherein the composition prepared in step a) is a composition in paste form having a dynamic viscosity greater than 5000. Pa.Math.s measured at a shear gradient of 0.1 s-1 and at ambient temperature; and wherein the preparation step consists in introducing the ingredients intended to be included in the constitution of the electrode into a mixer with two co-rotating interpenetrating screws rotating in a closed sleeve, and mixing the ingredients therein, the preparation step being implemented at a temperature less than 100° C.

A flexible multifunctional cross-linking adhesive, a preparation method therefor and an application thereof. The adhesive uses guar gum and carboxyl styrene butadiene rubber as raw materials, and is formed by intermolecular cross-linking between hydroxyl groups rich in the guar gum and carboxyl groups contained in the carboxyl styrene butadiene rubber to form a flexible multifunctional cross-linked network. Compared to the prior art, the water-based adhesive is a flexible cross-linking adhesive that has a strong bonding force, high mechanical strength, and no cracking due to tensile deformation, and is insoluble in a battery electrolyte. The adhesive may effectively accommodate the volume effect of a sulfur positive electrode and keep the positive electrode structure intact during a cycling operation. At the same time, the adhesive has significant advantages such as environmental friendliness and being low cost. The compacted sulfur positive electrode has a simple preparation process and has relatively large application prospects.

The present application provides a silicon-oxygen composite negative electrode material and a preparation method therefor, and a lithium ion battery. The silicon-oxygen composite negative electrode material has a core-shell structure, the core comprises nano-silicon and a silicon oxide SiO.sub.x, and the shell comprises Li.sub.2SiO.sub.3. The preparation method comprises: mixing a silicon source and a lithium source, and performing heat treatment in a non-oxygen atmosphere to obtain a composite material containing Li.sub.2SiO.sub.3; and immersing the composite material containing Li.sub.2SiO.sub.3 in an acid solution to obtain the silicon-oxygen composite negative electrode material. The nano-silicon in the negative electrode material provided by the present application is wrapped by SiO.sub.x, and the surface of SiO.sub.x is further wrapped with the Li.sub.2SiO.sub.3 having a stable structure, making it difficult for the nano-silicon to come into physical contact with substances other than the SiO.sub.x and impossible to come into direct contact with water, thereby effectively inhibiting gas production of a battery.

A carbon nanotube dispersion liquid for nonaqueous electrolyte secondary battery is a carbon nanotube dispersion liquid containing carbon nanotubes, a dispersant and a solvent, and is characterized in satisfying (1) to (3) below: (1) the average outer diameter of the carbon nanotubes ranging from more than 3 nm to 25 nm; (2) the BET surface area of the carbon nanotubes ranging from 150 m.sup.2/g to 800 m.sup.2/g; and (3) the fiber length of the carbon nanotubes in the carbon nanotube dispersion liquid ranging from 0.8 μm to 3.5 μm.

A negative electrode for lithium ion secondary batteries according to the present invention is provided with a negative electrode collector and a negative electrode mixture layer that is formed on the negative electrode collector; the negative electrode mixture layer comprises a negative electrode active material which contains graphite particles A that have an internal porosity of 10% or less, graphite particles B that have an internal porosity of more than 10%, and an alloying material that is alloyed with lithium; and the content of the alloying material is 15% by mass or less relative to the total amount of the negative electrode active material in the negative electrode mixture layer.

The present invention provides a sulfur-modified polyacrylonitrile, which has a content of sulfur of from 30 mass % to 50 mass %, and satisfies the expression: 4,500<140×x−y<5,200 when the content (mass %) of sulfur is represented by “x”, and an average CT value of the sulfur-modified polyacrylonitrile in X-ray CT is represented by “y”.

This power storage device uses a negative electrode active material layer which contains a negative electrode active material containing silicon-based particles and a polyimide-based binder, wherein the negative electrode active material layer has a porosity of less than 20%. This power storage device has a high charge/discharge capacity and excellent cycle characteristics.

A lamellar transition metal sulfide composition having layers of an amorphous transition metal sulfide with cations interspersed between the layers is described. Also described are methods of synthesizing the lamellar transition metal sulfides and the use of the lamellar transition metal sulfides in electrodes, e.g., in metal-ion batteries, metal-ion/sulfur batteries, and capacitors.

This non-aqueous electrolyte secondary battery is provided with: an electrode body that has a positive electrode and a negative electrode; and an outer package in which the electrode body is accommodated. The negative electrode comprises a negative electrode core body and a negative electrode mixture layer formed on the surface of the negative electrode core body. The negative electrode mixture layer comprises: a negative electrode active material that has a tap density of 1.00-1.20 g/cm.sup.3; CMC, the content of which accounts for 0.6-0.8 mass % in the negative electrode mixture layer; and SBR, the content of which accounts for 0.4-0.8 mass % in the negative electrode mixture layer. The mass ratio of the content of CMC to the content of SBR in the negative electrode mixture layer is less than 2, and the total content of CMC and SBR in the negative electrode mixture layer is less than 1.5 mass %.

The inventive concepts include at least an electrode architecture including a composite structure that includes engineered carbon nanofibers, a lithium-impervious elastic polymer, a copper collector and a lithium-containing cathode; dendrite-free, lithium metal-plated anode that includes the electrode architecture; and a lithium metal-based lithium ion battery that includes the lithium metal-plated anode, liquid and solid electrolytes and a lithium-free cathode.