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Lithium-sulfur battery material based on waste cigarette end biomass resources and preparation method thereof

A biomass resource and lithium-sulfur battery technology, applied in the fields of materials and energy, can solve the problems of cumbersome preparation process, high cost, and low sulfur loading capacity, and achieve the effect of simple preparation process, low cost, and large specific surface area

Inactive Publication Date: 2018-11-16
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the lithium-sulfur battery materials prepared by this method still face the disadvantages of cumbersome preparation process, high cost, low sulfur loading capacity, and poor performance, which cannot meet the actual needs. Therefore, it is urgent to develop a new type of lithium-sulfur battery material.

Method used

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  • Lithium-sulfur battery material based on waste cigarette end biomass resources and preparation method thereof
  • Lithium-sulfur battery material based on waste cigarette end biomass resources and preparation method thereof
  • Lithium-sulfur battery material based on waste cigarette end biomass resources and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Example 1, the preparation method and application of lithium-sulfur battery materials derived from biomass resources such as waste cigarette butts, including the following steps:

[0020] (1) Pretreatment of raw materials: The collected Marlboro cigarette butts (mainly composed of cellulose diacetate) were ultrasonically washed 3 to 5 times with 95% ethanol and water, and dried in a constant temperature drying oven at 60°C After drying for 2-24 hours, the resulting product is biomass carbon material (BC);

[0021] (2) Preparation of composite graphene-based biomass carbon material (GO / BC): mix 3-10 mg / mL graphene oxide and 10.0 mg biomass-based carbon material (BC), stir thoroughly for 2-8 h, then take out the composite The final sample was placed in a freeze dryer at -50 °C and freeze-dried for 24–36 h, and the resulting product was the composite precursor of biomass porous carbon (BC) and graphene (GO / BC);

[0022] (3) In situ construction of S@GO / PC composites using...

Embodiment 2

[0025] Embodiment 2, the preparation method and application of lithium-sulfur battery materials derived from biomass resources such as waste cigarette butts, includes the following steps:

[0026] (1) Pretreatment of raw materials: The collected Liqun brand cigarette butts (mainly composed of cellulose diacetate) were ultrasonically washed 3 to 5 times with 95% ethanol and water, and dried in a constant temperature drying oven at 60°C. Drying for 2-24 hours, the resulting product is biomass carbon material (BC);

[0027](2) Preparation of composite graphene-based biomass carbon material (GO / BC): mix 3-10 mg / mL graphene oxide and 10.0 mg biomass-based carbon material (BC), stir thoroughly for 2-8 h, then take out the composite The final sample was placed in a freeze dryer at -50 °C and freeze-dried for 24–36 h, and the resulting product was the composite precursor of biomass porous carbon (BC) and graphene (GO / BC);

[0028] (3) In situ construction of S@GO / PC composites using ...

Embodiment 3

[0031] Embodiment 3, the preparation method and application of lithium-sulfur battery materials derived from biomass resources such as waste cigarette butts, includes the following steps:

[0032] (1) Pretreatment of raw materials: The collected Marlboro cigarette butts (mainly composed of cellulose diacetate) were ultrasonically washed 3 to 5 times with 95% ethanol and water, and dried in a constant temperature drying oven at 60°C for 12 days. h, the resulting product is a biomass carbon material (BC);

[0033] (2) Biomass carbon material (GO / BC) for preparing composite graphene: 10 mg / mL graphene oxide and 1-20 mg biomass carbon material (BC) were mixed thoroughly for 2-8 h, and then the composite was taken out. The final sample was placed in a freeze dryer at -50 °C and freeze-dried for 24–36 h, and the resulting product was the composite precursor of biomass porous carbon (BC) and graphene (GO / BC);

[0034] (3) In situ construction of S@GO / PC composites using GO / BC precur...

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Abstract

The invention belongs to the field of materials and energy sources, and specifically discloses a lithium-sulfur battery material based on waste cigarette end biomass resources and a preparation methodthereof. The biomass such as waste cigarette ends is taken as a precursor raw material, the biomass of porous carbon is prepared through graphene composition and carbonization, and a biomass porous carbon material (S@GO / PC) is obtained through further sulfur loading. Due to the fact that the biomass porous material prepared by the method is of an unique hierarchical porous structure and has the advantages of high conductivity, high sulfur loading quantity and the like, when the biomass porous material serves as a lithium-sulfur battery material, the material has high battery specific capacityand excellent cycling stability. The lithium-sulfur battery material derived from an obtained biomass has excellent electrical conductivity, high sulfur loading quantity and excellent performance, the raw materials used for preparation are low in cost and easily obtained, large-scale preparation can be realized, and the method is an efficient, economical and environmentally-friendly preparation method for novel lithium-sulfur batteries.

Description

technical field [0001] The invention belongs to the technical field of materials and energy, and in particular relates to a lithium-sulfur battery material based on waste cigarette butt biomass resources and a preparation method thereof. Background technique [0002] With the increasingly serious environmental problems and the highlight of energy shortage, people's demand for miniaturization, diversity and variability of electronic products is becoming more and more urgent. It is imperative to develop advanced energy storage devices with high energy density and high cycle stability. must do. Among them, lithium-sulfur batteries have become a research hotspot for researchers all over the world due to their high theoretical specific capacity. Lithium-sulfur battery is a secondary battery with metal lithium as the negative electrode and elemental sulfur as the positive electrode. The mutual conversion between electrical energy and chemical energy is realized through the breaki...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/38H01M4/62H01M10/052
CPCH01M4/362H01M4/38H01M4/62H01M4/625H01M4/628H01M10/052Y02E60/10
Inventor 吴仁兵徐鸿彬刘洋哈媛
Owner FUDAN UNIV
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