68results about How to "Coulombic efficiency is high" patented technology

The purpose of the present invention is to provide a zinc negative electrode mixture for forming the negative electrode for a safe and economic battery exhibiting excellent battery performance, and a gel electrolyte or a negative electrode mixture which can be suitably used for forming a storage battery exhibiting excellent battery performances such as a high cycle characteristics, rate characteristics, and coulombic efficiency while inhibiting passivation and morphology of an electrode active material such as dendrite and shape change in the electrode active material. Another purpose of the present invention is to provide a battery using the zinc negative electrode mixture or the gel electrolyte. A zinc negative electrode mixture (1) containing a zinc-containing compound and a conductive auxiliary agent, wherein the zinc-containing compound and / or the conductive auxiliary agent contain particles having an average particle size of 1000 [mu]m or less and / or particles having an aspect ratio (vertical / lateral) of 1.1 or more. A gel electrolyte (2) used in a battery, the gel electrolyte being characterized by having a cross-linking structure formed by a multivalent ion and / or an inorganic compound. A negative electrode mixture (3) used in a battery, the negative electrode mixture being characterized by containing a negative electrode active material and a polymer.

The present disclosure provides an electrochemical storage cell including a battery. The battery includes an alkali metal anode having an anode Fermi energy, an electronically insulating, amorphous, dried solid electrolyte able to conduct alkali metal, having the general formula A3-xHxOX, in which 0 <= x <= 1, A is the alkali metal, and X is at least one halide, and a cathode including a cathode current collector having a cathode Fermi energy lower than the anode Fermi energy. During operation of the electrochemical storage cell, the alkali metal plates dendrite-free from the solid electrolyteonto the alkali metal anode. Also during operation of the electrochemical storage cell, the alkali metal further plates on the cathode current collector.

The invention relates to an adhesive for a lithium ion battery, and discloses an adhesive containing sodium carboxymethyl cellulose copolymers covalently grafted with sodium polyacrylate and an electrode slice and electrochemical device prepared from the adhesive. Compared with an adhesive in the prior art, the adhesive is strong in cohesiveness, good in electrochemical stability and especially suitable for the lithium ion battery with silicon as an anode, the capacity of the lithium ion battery can be remarkably improved, the circulating stability of the battery can be improved, and the coulombic efficiency of the battery can be improved.

The invention belongs to the field of new energy, and discloses a graphitized carbon-coated porous carbon sphere with a high specific surface area and a preparation method and application thereof. The porous carbon spheres are obtained by calcining the phenolic resin-based nanospheres at 600-1600°C under a protective atmosphere, and then activating the obtained phenolic resin-based nanocarbon spheres with a strong base to form pores, followed by cleaning and drying to obtain HSCS; The uniformly ground nickel mixture is carbonized at 600-1600°C under a nitrogen atmosphere, cleaned with acid, and dried; the phenolic resin-based nanospheres are mixed with ammonia water, absolute ethanol, and distilled water, Hydroquinone and formaldehyde are stirred until they are completely dissolved, heated in a water bath at 30-90°C, then subjected to a hydrothermal reaction at 100-200°C, centrifuged, filtered, washed and dried. The porous carbon sphere has an optimized sodium storage effect, improves the first coulombic efficiency of the sodium ion battery, and can be applied in the sodium ion battery.