Battery, capacitor diaphragm and preparation method of battery and capacitor diaphragm

Abstract

The invention relates to a battery, a capacitor diaphragm and a preparation method of the battery and the capacitor diaphragm. The diaphragm is prepared from, by weight, 65% to 75% of sulfite wood pulp, 10% to 20% of superabsorbent fibers (SAF), 5% to 30% of attapulgite mineral powder, 0.3% to 0.8% of chitosan, 3% of synthetic fibers and 1.2% to 1.7% of hydrogen storage material ZnO2. The preparation method of the battery and the capacitor diaphragm comprises the step that the finished product is prepared through the steps of plant fiber pulping, inorganic powder dispersing, superabsorbent fiber dispersing, mixed pulping, wet forming, extruding dehydration, heating dehydration, single-face coarsening, rolling and splitting and the like. The defects that in the existing process and technology, the aperture and porosity of a super capacitor diaphragm of a battery are hard to control, the electrolyte retention rate is low, proton passing resistance is large, the gluing process is hard to control, and single-face coarsening of the diaphragm cannot be achieved are overcome, and according to the battery, the capacitor diaphragm and the preparation method of the battery and the capacitor diaphragm, the liquid retention rate is high, gas permeability is good, the physical property is high, internal resistance is low, and the process and technology are more advanced.

Description

technical field [0001] The invention belongs to the technical fields of wet papermaking and electrochemistry, and relates to a battery, a capacitor diaphragm and a preparation method thereof. Background technique [0002] Batteries and supercapacitor diaphragms are one of the four core technologies of batteries and supercapacitors, and their value accounts for as much as 20-30%. More and more attention is paid to the production of high-quality batteries and supercapacitor diaphragms. At present, batteries and supercapacitor diaphragms are usually made of chemical fibers and produced by wet-laid non-woven fabric production technology. Compared with traditional papermaking, there are many special processes in the production of wet-laid non-woven fabrics. [0003] High-quality separator paper for batteries and supercapacitors is mostly made of 100% low-melting fiber paper, such as PP and PE. In order to meet the special hydrophilic requirements of battery separator paper, it...

AI Technical Summary

Problems solved by technology

[0012] The purpose of the present invention is to overcome the difficulty in controlling the pore size and porosity of the battery supercapacitor diaphragm in the existing technology and technology, the low electrolyte retention rate, the high resistance of proton passage, the difficulty in controlling the sizing process, and the inability to realize single-sided coarsening of the diaphragm, etc. Disadvantages, provide a battery capacitor separator with high liquid retention rate, good air permeability, high physical properties, low internal resistance, more advanced production process and technology and its preparation method

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