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Method for preparing anode material of ion battery by utilizing retrograded starch

A technology of ion batteries and retrograded starch, which is applied in the fields of food biotechnology and energy storage materials, can solve the problems of high energy density, high working voltage, lithium-ion battery energy density cycle performance and safety performance need to be further improved, and achieve low price , wide source, wide selection effect

Inactive Publication Date: 2016-08-24
TIANJIN UNIV OF COMMERCE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, lithium-ion batteries using metal lithium as the positive electrode and graphite as the negative electrode have the advantages of high energy density, high operating voltage, and wide operating temperature range. Since their development, they have been widely used in portable electronic equipment and other fields. The energy density, power density, cycle performance and safety performance of batteries need to be further improved
On the other hand, with the expected large-scale application of lithium-ion batteries in the fields of electric vehicles and energy storage power stations in the future, limited lithium resources will be difficult to meet the growing demand, which will greatly limit the sustainable development of lithium-ion batteries

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] (1) Mix 100 grams of sweet potato starch with water to make starch milk with a concentration of 10%. After gelatinization at 90°C for 30 minutes, put it into a pressure cooker for high-pressure treatment. The high-pressure temperature is 105-120°C, and the high-pressure time is 30 minutes. The semi-solid retrograded resistant starch was obtained by aging, the aging temperature was 15°C, and the aging time was 6h.

[0017] (2) Enzymolyze the retrograded resistant starch obtained in step (1) with high-temperature amylase. The enzymatic hydrolysis conditions are: add 1200 U of amylase to every 100 g of the retrograded resistant starch obtained in step (1), and the enzymatic hydrolysis temperature is 90-100 ℃, the enzymolysis time is 10 minutes, and then centrifuged at 3000 rpm, the precipitate is washed three times with three times the volume of water and then centrifuged to obtain purified retrograded resistant starch.

[0018] (3) The purified retrograded resistant starc...

Embodiment 2

[0021] (1) Mix 100 grams of cornstarch with water to make starch milk with a concentration of 10%. After gelatinization at 90°C for 30 minutes, put it into a pressure cooker for high-pressure treatment. The high-pressure temperature is 105-120°C, and the high-pressure time is 30 minutes. The semi-solid retrograded resistant starch was obtained by aging, the aging temperature was 15°C, and the aging time was 6h.

[0022] (2) Enzymolyze the retrograded resistant starch obtained in step (1) with high-temperature amylase. The enzymatic hydrolysis conditions are: add 1200 U of amylase to every 100 g of the retrograded resistant starch obtained in step (1), and the enzymatic hydrolysis temperature is 90-100 ℃, the enzymolysis time is 10 minutes, and then centrifuged at 3000 rpm, the precipitate is washed three times with three times the volume of water and then centrifuged to obtain purified retrograded resistant starch.

[0023] (3) The purified retrograded resistant starch obtaine...

Embodiment 3

[0026] (1) Mix 100 grams of wheat starch with water to make starch milk with a concentration of 10%. After gelatinization at 90°C for 30 minutes, put it into a pressure cooker for high-pressure treatment. The high-pressure temperature is 105-120°C, and the high-pressure time is 30 minutes. The semi-solid retrograded resistant starch was obtained by aging, the aging temperature was 15°C, and the aging time was 6h.

[0027] (2) Enzymolyze the retrograded resistant starch obtained in step (1) with high-temperature amylase. The enzymatic hydrolysis conditions are: add 1200 U of amylase to every 100 g of the retrograded resistant starch obtained in step (1), and the enzymatic hydrolysis temperature is 90-100 ℃, the enzymolysis time is 10 minutes, and then centrifuged at 3000 rpm, the precipitate is washed three times with three times the volume of water and then centrifuged to obtain purified retrograded resistant starch.

[0028] (3) The purified retrograded resistant starch obtai...

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Abstract

The invention discloses a method for preparing an anode material of an ion battery by utilizing retrograded starch. The method comprises the following steps of adopting an authorized patent to prepare amylose and amylopectin, wherein the authorized patent is a method for preparing amylose with the narrower molecular weight distribution range, and the patent number is ZL 201110120286.3; respectively dissolving the amylose and the amylopectin by utilizing alkali liquor with the concentration of 2-4 mol / L, utilizing hydrochloric acid with the concentration of 6-12 mol / L to adjust the solution to be neutral, and reusing the method in the step (1) to prepare secondary retrograded amylose and amylopectin; taking the secondary retrograded amylose and amylopectin as raw materials and continuing to use the method in the step (1) to prepare third retrograded amylose and amylopectin and fourth retrograded amylose and amylopectin; drying at 60 DEG C to constant weight, crushing and sieving in a 200-mesh sifter to obtain the retrograded starch for preparing the anode material of the ion battery. The first charging capacity of the ion battery with the retrograded starch as a cathode is greater than 382 mAh g-1, the charging capacity is greater than 372 mAh g-1, and after circulating for 30 times, the charging capacity is greater than 337 mAh g-1.

Description

technical field [0001] The invention relates to the fields of food biotechnology and energy storage materials, in particular to a method for preparing negative electrode materials for ion batteries by utilizing retrograded starch. Background technique [0002] At present, lithium-ion batteries using metal lithium as the positive electrode and graphite as the negative electrode have the advantages of high energy density, high operating voltage, and wide operating temperature range. Since their development, they have been widely used in portable electronic equipment and other fields. The energy density, power density, cycle performance and safety performance of batteries need to be further improved. On the other hand, with the expected large-scale application of lithium-ion batteries in the fields of electric vehicles and energy storage power stations in the future, limited lithium resources will be difficult to meet the growing demand, which will greatly limit the sustainable...

Claims

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Application Information

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IPC IPC(8): H01M4/60H01M10/0525H01M10/054
CPCH01M4/604H01M10/0525H01M10/054Y02E60/10
Inventor 连喜军
Owner TIANJIN UNIV OF COMMERCE