Continuous production method of carboxymethylcellulose lithium for lithium batteries

A technology of carboxymethyl cellulose and sodium carboxymethyl cellulose is applied in the field of preparation of lithium carboxymethyl cellulose, and can solve the problems of environmental pollution, high price and single function of lithium ion battery binders.

Inactive Publication Date: 2016-02-17
CHONGQING LIHONG FINE CHEM +1
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  • Summary
  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a continuous production of carboxymethyl cellulose lithium for lithium batteries that can be industr

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] (1) Preparation of CMC-H: The performance indicators of the prepared CMC-Na are: DS=0.93, moisture content 34.5%, 1% dry sample viscosity 4119cP, purity 99.0%. Disperse 80g of CMC-Na in sulfuric acid acidification solution with a mass fraction of 20%, the mass ratio of acidification solution to CMC-Na dry sample is 10:1, acidify at 20°C for 2h, filter and deliquify to obtain CMC-H. Then wash several times with flowing water to pH 3-6. No drying, crushing treatment.

[0033](2) Preparation of CMC-Li: 180 g of the obtained CMC-H wet material was added into the ethanol / water solvent system, and the moisture content of the CMC-H wet material was 75.0%. The mass ratio of ethanol / water solvent to CMC-H dry sample is 19.7:1. Then 152.0 g of LiOH aqueous solution with a mass fraction of 10.0% was added, and the mass ratio of lithium hydroxide to CMC-H dry sample was 0.34:1. The mass ratio of ethanol and water in the system is: 1.18:1. The above mixture was reacted at 40°C f...

Embodiment 2

[0036] (1) Preparation of CMC-H: The performance indicators of the prepared CMC-Na are: DS=0.93, moisture content 34.5%, 1% dry sample viscosity 4119cP, purity 99.0%. Disperse 80g of CMC-Na in sulfuric acid acidification solution with a mass fraction of 15%, the mass ratio of acidification solution to CMC-Na dry sample is 10:1, acidify at 30°C for 50min, filter and deliquify to obtain CMC-H. Then wash several times with flowing water to pH 3-6. No drying, crushing treatment.

[0037] (2) Preparation of CMC-Li: 180 g of the obtained CMC-H wet material was added into the ethanol / water solvent system, and the moisture content of the CMC-H wet material was 75.0%. The mass ratio of ethanol / water solvent to CMC-H dry sample is 17.7:1. Then 243.7g of LiOH aqueous solution with a mass fraction of 5.2% was added, and the mass ratio of lithium hydroxide to CMC-H dry sample was 0.25:1. The mass ratio of ethanol and water in the system is: 1.13:1. The above mixture was reacted at 45°C...

Embodiment 3

[0040] (1) Preparation of CMC-H: The performance indicators of the prepared CMC-Na are: DS=0.91, moisture content 9.3%, 1% dry sample viscosity 3243cP, purity 99.0%. Disperse 55g of CMC-Na in sulfuric acid acidification solution with a concentration of 15%, the mass ratio of acidification solution and CMC-Na dry sample is 10:1, acidify at 30°C for 50min, filter and deliquify to obtain CMC-H. Then wash several times with flowing water to pH 3-6. Do not dry or pulverize.

[0041] (2) Preparation of CMC-Li: Add 210 g of the obtained CMC-H wet material into the ethanol / water solvent system, and the moisture content of the CMC-H wet material is 78.7%. The mass ratio of ethanol / water solvent and CMC-H dry sample is: 20.0:1. Then 174.0 g of LiOH aqueous solution with a mass fraction of 7.2% was added, and the mass ratio of lithium hydroxide to CMC-H dry sample was 0.28:1. The mass ratio of ethanol and water in the system is: 1.28:1. The above mixture was reacted at 45°C for 2 hou...

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Abstract

The invention discloses a continuous production method of carboxymethylcellulose lithium for lithium batteries in order to solve the problems that a lithium ion battery adhesion agent pollutes the environment, is single in function and high in price. The production method includes the steps that sodium carboxymethyl cellulose is prepared, and the carboxymethylcellulose lithium is obtained after the sodium carboxymethyl cellulose is acidized, alkalinized and purified. The prepared carboxymethylcellulose lithium breaks the pattern that autonomous mass production of carboxymethylcellulose lithium cannot be achieved domestically, according to the current condition of domestic production, on the basis that the performance of the carboxymethylcellulose lithium is guaranteed, continuous and large-batch production of the carboxymethylcellulose lithium can be achieved, and production cost is greatly reduced. A series of product performance testing preparation parameters are summarized in the method, and the parameters are quality control indexes of carboxymethylcellulose lithium and can also provide a reference for establishing standards of industrialized carboxymethylcellulose lithium in future.

Description

technical field [0001] The invention relates to a preparation method of carboxymethyl cellulose lithium, in particular to a continuous production method of carboxymethyl cellulose lithium for lithium batteries. Background technique [0002] With the development of society, the functions of mobile terminal equipment are becoming more and more powerful, and the large screen has become a trend; the development of the electric vehicle industry is also attracting attention day by day. The performance of batteries has become the bottleneck of the development of these industries. It has become a challenge to prepare batteries with high specific capacity, cyclic storage, especially after repeated charge and discharge and high current fast charge and discharge, which can still maintain stable performance and are non-polluting to the environment and human body. The focus of the research. Lithium metal has the lightest weight, the lowest oxidation-reduction potential, the highest spec...

Claims

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Application Information

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IPC IPC(8): C08B11/12
CPCC08B11/12
Inventor 邵自强段洪涛周振文李友琦何玉明陈静
Owner CHONGQING LIHONG FINE CHEM
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