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Maltose-derived carbon/titanium niobium oxide composite material and preparation method and application thereof

A composite material and maltose technology, which are applied in the field of maltose-derived carbon/titanium niobium oxide composite materials and their preparation to achieve the effects of improving utilization, increasing specific surface area, and improving rate performance and cycle performance

Active Publication Date: 2021-03-12
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, there has been no report on this powerful carbon composite technology, and its application value is particularly worthy of exploration and research

Method used

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  • Maltose-derived carbon/titanium niobium oxide composite material and preparation method and application thereof
  • Maltose-derived carbon/titanium niobium oxide composite material and preparation method and application thereof
  • Maltose-derived carbon/titanium niobium oxide composite material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Wash the purchased glutinous rice and pour it into a pot to simmer and stir it with the chopped malt, let it ferment for 4-6 hours until the juice is transformed. Then the juice is filtered out and boiled at high temperature to form a paste, and after cooling, it becomes an amber-like candy. The titanium niobium oxide powder was poured into maltose and stirred ultrasonically for 30 minutes, the mass ratio of titanium niobium oxide powder and maltose was 1:4, and then freeze-dried with a freeze dryer for 24 hours. The precursor obtained by freeze-drying was preheated at 600°C in argon for 4h, then transferred to a tube furnace for sintering at 800°C for 3h, and the heating rate was 5°C / min. After cooling, maltose-derived carbon / titanium niobium was obtained Oxygen composites.

Embodiment 2

[0031] Wash the purchased glutinous rice and pour it into a pot to simmer and stir it with the chopped malt, let it ferment for 4-6 hours until the juice is transformed. Then the juice is filtered out and boiled at high temperature to form a paste, and after cooling, it becomes an amber-like candy. The titanium niobium oxide powder was poured into maltose and stirred ultrasonically for 30 minutes, the mass ratio of titanium niobium oxide powder and maltose was 1:4, and then freeze-dried with a freeze dryer for 24 hours. The precursor obtained by freeze-drying was preheated at 600°C in argon for 4h, then transferred to a tube furnace for sintering at 800°C for 5h, and the heating rate was 5°C / min. After cooling, maltose-derived carbon / titanium niobium was obtained Oxygen composites.

Embodiment 3

[0033] Wash the purchased glutinous rice and pour it into a pot to simmer and stir it with the chopped malt, let it ferment for 4-6 hours until the juice is transformed. Then the juice is filtered out and boiled at high temperature to form a paste, and after cooling, it becomes an amber-like candy. The titanium niobium oxide powder was poured into maltose and stirred ultrasonically for 30 minutes, the mass ratio of titanium niobium oxide powder and maltose was 1:4, and then freeze-dried with a freeze dryer for 24 hours. The precursor obtained by freeze-drying was preheated in argon at 600°C for 4h, then transferred to a tube furnace for sintering at 800°C for 4h, and the heating rate was 5°C / min. After cooling, maltose-derived carbon / titanium niobium was obtained Oxygen composites.

[0034] figure 1 , 2 It is a scanning electron micrograph of the maltose-derived carbon / titanium-niobium-oxygen composite material prepared in Example 3. image 3 It is a transmission electron ...

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Abstract

The invention discloses a maltose-derived carbon-based composite material and a preparation method and application thereof. The preparation method comprises the following steps: obtaining maltose; pouring the titanium niobium oxide powder into maltose, carrying out ultrasonic stirring, and carrying out freeze drying by using a freeze dryer; and transferring the precursor to a tubular furnace froma quartz boat, preheating for 3-6 hours at 500-650 DEG C in argon, then sintering into a phase for 3-6 hours at 700-850 DEG C, and cooling to obtain the maltose-derived carbon / titanium niobium oxide composite material. According to the invention, a large amount of maltose-derived carbon-based composite material is synthesized through high-temperature carbonization. The composite material electrodedisclosed by the invention is of a three-dimensional porous structure, has the characteristics of relatively high specific surface area, relatively high cycling stability, rate capability, coulombicefficiency and the like, is particularly suitable for being used as a battery electrode material, and is beneficial to promoting the development of commercial batteries with high energy density, highpower density and high stability.

Description

technical field [0001] The invention relates to the technical field of positive and negative electrode materials for batteries, in particular to a maltose-derived carbon / titanium-niobium-oxygen composite material and a preparation method and application thereof. Background technique [0002] Carbon technology has a profound impact on social development and the progress of human civilization. With the technical progress of carbon materials (such as charcoal, coal, graphite), a series of reforms and leaps have taken place in the social energy system. Currently, the scientific community is still eager to explore advanced carbon-based materials for higher green energy efficiency and utilization. So far, various carbonized materials (e.g., graphene, carbon nanotubes, footballene, carbon quantum dots, and carbon micro / nanofibers) and their composites have been mainly produced by chemical vapor deposition, chemical or electrochemical exfoliation, electrospinning, etc. However, th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/48H01M4/583H01M10/0525
CPCH01M4/366H01M4/483H01M4/583H01M10/0525H01M2004/021Y02E60/10
Inventor 夏新辉沈盛慧王秀丽涂江平
Owner ZHEJIANG UNIV
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