Preparation method of lithium carboxymethyl cellulose for lithium battery

A technology of carboxymethyl cellulose and sodium carboxymethyl cellulose, which is applied in the direction of battery electrodes, circuits, electrical components, etc., can solve the problems of high price and environmental pollution of lithium-ion battery binders, and achieve low price and high efficiency. Cycle stability, discharge capacity, and high purity
CN102206286AInactive Publication Date: 2011-10-05BEIJING INSTITUTE OF TECHNOLOGYGY +1
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
BEIJING INSTITUTE OF TECHNOLOGYGY
Publication Date
2011-10-05
Estimated Expiration
Not applicable · inactive patent
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Abstract

The invention relates to a preparation method of lithium carboxymethyl cellulose for a lithium battery, belonging to the field of natural high-polymer chemical modification. The preparation method provided by the invention comprises the following steps: dispersing sodium carboxymethyl cellulose prepared by a slurry process into an organic solvent, adding a hydrochloric acid water solution, mixing, reacting at 20-50 DEG C, removing the liquid, washing with an 80-95 vol% organic solvent, removing the liquid, baking, and pulverizing to obtain carboxymethyl cellulose acid; and dispersing the carboxymethyl cellulose acid in an organic solvent, adding an LiOH.H2O water solution, reacting at 40-60 DEG C, neutralizing with glacial acetic acid until the pH value is 6-8, washing with a 75-85% organic solvent, removing the liquid, baking, and pulverizing to obtain the lithium carboxymethyl cellulose. The preparation method can be used for obtaining lithium carboxymethyl cellulose with different degrees of substitution, different viscosities and excellent water solubility, and provides a novel water-soluble binder with low price and excellent properties, thereby enhancing the cyclical stability and discharge capacity of the lithium battery.
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Description

technical field

[0001] The invention relates to a preparation method of carboxymethyl cellulose lithium for lithium batteries, belonging to the field of chemical modification of natural polymers. Background technique

[0002] With the increasing shortage of chemical fuel resources worldwide, people are forced to look for new alternative clean energy sources. Batteries have become an ideal alternative energy source due to their convenient use, low price, light weight, long cycle storage life, stable working voltage, and benefits to the environment. In chemical batteries, lithium (ion) batteries have incomparable advantages over traditional lead-acid, nickel-cadmium, and nickel-metal hydride batteries because lithium metal is the lightest of all metals, has the lowest oxidation-reduction potential, and has the largest mass energy density.

[0003] Lithium-ion battery is a high-performance secondary battery, which has the advantages of high working voltage, high volume and wei...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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