Abstract

An organic-inorganic composite separator for a lithium battery and a preparation method therefor belong to the technical field of lithium batteries. The composite separator comprises an intermediate inorganic ceramic layer and organic layers on both sides thereof. The raw materials of the organic layers comprise the following components: a polyolefin, a non-conjugated olefin copolymer, a surfactant, an antioxidant, a lubricant, a filler, and a first solvent. The raw materials of the inorganic ceramic layer comprise, in parts by weight, the following components: an alumina/zirconia/two-dimensional nano-titanium carbide composite particle, a nano-alumina particle, a binder, a non-ionic surface activity, and a second solvent. The lithium battery of the organic-inorganic composite separator provided has the advantages of having high temperature resistance and high strength.

IPC Classes  ?

• H01M 2/14 - Separators; Membranes; Diaphragms; Spacing elements
• H01M 2/16 - Separators; Membranes; Diaphragms; Spacing elements characterised by the material

Abstract

A negative electrode material of a lead-carbon battery with high cycle index and a preparation method. The negative electrode material comprises the following components taken as raw materials in parts by weight: 5-10 parts of sulfuric acid, 0.5-2 parts of barium sulfate, 0.5-2 parts of silicon carbide powder, 0.1-0.15 part of white carbon black, 0.2-0.4 part of graphene-modified polyacrylic fiber, 0.05-0.1 part of titanate coupling agent, 0.1-0.15 part of nonionic surfactant, 7-12 parts of pure water and 50-60 parts of lead powder. The lead-carbon battery prepared by the negative electrode material has large capacitance and low electric-energy loss after circulating discharge.

IPC Classes  ?

• H01M 4/20 - Processes of manufacture of pasted electrodes
• H01M 4/14 - Electrodes for lead-acid accumulators

Abstract

A preparation method for a lithium iron phosphate cathode material, wherein the preparation material comprises, by weight, lithium hydroxide 20-40 parts, microcrystalline cellulose 30-70 parts, water 30-40 parts, and iron phosphate 90-150 parts; and the material is prepared by the steps of: raw material reaction, slurry preparation, drying and sintering. By means of the described method, the lithium iron phosphate cathode material is prepared.

IPC Classes  ?

• H01M 4/58 - Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFySelection of substances as active materials, active masses, active liquids of polyanionic structures, e.g. phosphates, silicates or borates
• C01B 25/46 - Preparation involving solvent-solvent extraction