Silicon/carbon/iron oxide composite material and preparation method thereof

A composite material and iron oxide technology, which is applied in the field of silicon/carbon/iron oxide composite materials and their preparation, can solve the volume expansion of silicon-based materials and other problems, achieve high energy density, reduce pollutant emissions, and good cycle stability Effect

Active Publication Date: 2021-03-26
ENERGY & ENVIRONMENT RES INST OF HEILONGJIANG PROVINCE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to improve the lithium storage capacity of carbon materials while solving the problem of volume expansion of silicon-based materials, and to provide a silicon / carbon / iron oxide composite material with catalytic oil slurry as a carbon source and a preparation method thereof

Method used

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  • Silicon/carbon/iron oxide composite material and preparation method thereof
  • Silicon/carbon/iron oxide composite material and preparation method thereof
  • Silicon/carbon/iron oxide composite material and preparation method thereof

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Experimental program
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Effect test

specific Embodiment approach 1

[0033] A method for preparing a silicon / carbon / iron oxide composite material, comprising the steps of:

[0034] Step a, the catalytic oil slurry is pretreated to obtain clarified oil for use;

[0035] Step b, preparing a carbon-silicon composite material;

[0036] Step c, preparing silicon / carbon / iron oxide composite material.

[0037] In the preparation method of a silicon / carbon / iron oxide composite material described in this embodiment, the pretreatment of the catalytic oil slurry in step a is a vacuum distillation method.

[0038] A method for preparing a silicon / carbon / iron oxide composite material described in this embodiment, the method for preparing a carbon-silicon composite material in step b includes the following steps:

[0039] Step b1. Weigh the clarified oil and nano-silica powder according to the mass ratio, heat and stir the clarified oil at 40°C for 30 minutes, then add nano-silica powder, and mix evenly under ultrasonic conditions to obtain a mixture for u...

specific Embodiment approach 2

[0053] A method for preparing a silicon / carbon / iron oxide composite material, comprising the steps of:

[0054] Step a, the catalytic oil slurry is pretreated to obtain clarified oil for use;

[0055] Step b, preparing a carbon-silicon composite material;

[0056] Step c, preparing silicon / carbon / iron oxide composite material.

[0057] In the preparation method of a silicon / carbon / iron oxide composite material described in this embodiment, the pretreatment of the catalytic oil slurry in step a is a vacuum distillation method.

[0058] A method for preparing a silicon / carbon / iron oxide composite material described in this embodiment, the method for preparing a carbon-silicon composite material in step b includes the following steps:

[0059] Step b1. Weigh the clarified oil and nano-silica powder respectively according to the mass ratio, heat and stir the clarified oil at 30°C for 60 minutes, then add nano-silica powder, and mix uniformly under ultrasonic conditions to obtain...

specific Embodiment approach 3

[0072] A method for preparing a silicon / carbon / iron oxide composite material, comprising the steps of:

[0073] Step a, the catalytic oil slurry is pretreated to obtain clarified oil for use;

[0074] Step b, preparing a carbon-silicon composite material;

[0075] Step c, preparing silicon / carbon / iron oxide composite material.

[0076] According to the preparation method of a silicon / carbon / iron oxide composite material described in this embodiment, the cycle performance comparison curve of a silicon / carbon / iron oxide composite material prepared at different temperatures is as follows Figure 5 As shown, the temperature marked in the figure is the set temperature when preparing the carbon-silicon composite material in step b, from Figure 5 It can be seen from the figure that the capacity of the silicon / carbon / iron oxide composite material can reach more than 550mAh / g. Through the regulation and design of the microscopic morphology and structure of silicon / carbon / iron oxide...

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Abstract

The invention discloses a preparation method of a silicon/carbon/iron oxide composite material, and belongs to the field of composite materials. The technical problem to be solved by the invention isto improve the lithium storage capacity and inhibit the volume expansion of a silicon-based material. The preparation method comprises the steps: pretreating catalytic slurry oil to obtain clarified oil, designing a 'buffer skeleton' through regulation and control design of the microstructure and structure of a silicon/carbon/iron oxide composite material, and compounding iron oxide, a silicon nano-material and carbon to further improve the electrical properties of a carbon material. The catalytic slurry oil is utilized to obtain a lithium ion battery negative electrode material with high additional value, the resource waste and pollutant discharge caused by extensive combustion of the slurry oil are reduced from the source, the pressure of energy and ecological environment is reduced, theharmless and resource utilization problems of the catalytic slurry oil are solved, and meanwhile, the lithium ion battery negative electrode material has a strong promotion effect on the lithium battery industry, the product chain of traditional slurry oil deep processing is expanded, and a new thought is provided for design and application of a novel high-performance energy storage carbon material.

Description

technical field [0001] The invention belongs to the field of composite materials, specifically a silicon / carbon / iron oxide composite material and a preparation method thereof. Background technique [0002] In the past two decades, the rapid development of computer technology and modern communication technology has rapidly integrated a large number of Internet-based modern electronic devices (such as notebook computers, tablet computers, smart phones and digital cameras, etc.) into our lives and In the middle of work, this also makes the secondary battery that provides power for it begin to play an extremely important role. Currently commercially available secondary batteries mainly include nickel-metal hydride batteries, nickel-chromium batteries, lead-acid batteries and lithium-ion batteries. Lithium-ion batteries have basically occupied the market of portable consumer electronics products due to their high energy density and power density, no memory effect, long cycle lif...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/05C01B33/00C01G49/08B82Y30/00B82Y40/00H01M4/36H01M4/38H01M4/52H01M4/62H01M10/0525
CPCC01B32/05C01B33/00C01G49/08H01M4/366H01M4/386H01M4/523H01M4/625H01M10/0525B82Y30/00B82Y40/00C01P2004/03C01P2004/80C01P2004/61Y02E60/10
Inventor 杨光李健张玥王志成丁会敏陈松张宇唐诗洋
Owner ENERGY & ENVIRONMENT RES INST OF HEILONGJIANG PROVINCE
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