Sulfur/titanium dioxide/pyrolytic carbon composite positive electrode material for aluminum ion battery, preparation method for sulfur/titanium dioxide/pyrolytic carbon composite positive electrode material, and aluminum ion battery

A composite positive electrode material and aluminum ion battery technology, applied in battery electrodes, non-aqueous electrolyte storage batteries, circuits, etc., can solve the problems of limited improvement in the initial discharge capacity, energy density and cycle performance of aluminum ion batteries, and achieve improved liquid absorption and protection liquid capacity, high compatibility, and high conductivity

Active Publication Date: 2016-12-07
深圳博磊达新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The composite electrode material can improve the specific capacity and cycle stability of the secondary aluminum battery to a certain extent, but the improvement of the initial discharge capacity, energy density and cycle performance of the aluminum ion battery is limited, and it cannot meet the requirements of use.

Method used

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  • Sulfur/titanium dioxide/pyrolytic carbon composite positive electrode material for aluminum ion battery, preparation method for sulfur/titanium dioxide/pyrolytic carbon composite positive electrode material, and aluminum ion battery
  • Sulfur/titanium dioxide/pyrolytic carbon composite positive electrode material for aluminum ion battery, preparation method for sulfur/titanium dioxide/pyrolytic carbon composite positive electrode material, and aluminum ion battery
  • Sulfur/titanium dioxide/pyrolytic carbon composite positive electrode material for aluminum ion battery, preparation method for sulfur/titanium dioxide/pyrolytic carbon composite positive electrode material, and aluminum ion battery

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Embodiment 1

[0033] The sulfur / titanium dioxide / pyrolytic carbon composite positive electrode material for aluminum ion batteries of this embodiment has a core-shell structure, the core of the core-shell structure is elemental sulfur, and the shell is mainly composed of nano-titanium dioxide, carbon nanotubes, The coating layer formed by porous pitch pyrolysis carbon composite; wherein, the mass ratio of elemental sulfur to nano-titanium dioxide and carbon nanotubes is 1:3:0.5, and the mass ratio of nano-titanium dioxide to porous pitch forming pyrolytic carbon is 3:5 .

[0034] The preparation method of the aluminum ion battery sulfur / titanium dioxide / pyrolytic carbon composite positive electrode material of the present embodiment comprises the following steps:

[0035] 1) Preparation of porous asphalt:

[0036]Add 5g of asphalt into 150ml of anhydrous carbon tetrachloride, stir until the asphalt is completely dissolved to obtain a pitch-based carbon tetrachloride solution; place 10g of ...

Embodiment 2

[0046] The sulfur / titanium dioxide / pyrolytic carbon composite positive electrode material for aluminum ion batteries of this embodiment has a core-shell structure, the core of the core-shell structure is elemental sulfur, and the shell is mainly composed of nano-titanium dioxide, carbon nanotubes, A coating layer formed by composite porous pitch pyrolysis carbon; wherein, the mass ratio of elemental sulfur to nano-titanium dioxide and carbon nanotubes is 0.5:1:0.1, and the mass ratio of nano-titanium dioxide to porous pitch forming pyrolytic carbon is 1:1 .

[0047] The preparation method of the aluminum ion battery sulfur / titanium dioxide / pyrolytic carbon composite positive electrode material of the present embodiment comprises the following steps:

[0048] 1) Preparation of porous asphalt:

[0049] Add 1g of asphalt into 100ml of anhydrous carbon tetrachloride, stir until the asphalt is completely dissolved to obtain a pitch-based carbon tetrachloride solution; place 5g of ...

Embodiment 3

[0058] The sulfur / titanium dioxide / pyrolytic carbon composite positive electrode material for aluminum ion batteries of this embodiment has a core-shell structure, the core of the core-shell structure is elemental sulfur, and the shell is mainly composed of nano-titanium dioxide, carbon nanotubes, The coating layer formed by porous pitch pyrolysis carbon composite; wherein, the mass ratio of elemental sulfur to nano-titanium dioxide and carbon nanotubes is 5:5:1, and the mass ratio of nano-titanium dioxide to porous pitch forming pyrolytic carbon is 5:10 .

[0059] The preparation method of the aluminum ion battery sulfur / titanium dioxide / pyrolytic carbon composite positive electrode material of the present embodiment comprises the following steps:

[0060] 1) Preparation of porous asphalt:

[0061] Add 10g of asphalt into 200ml of anhydrous carbon tetrachloride, and stir until the asphalt is completely dissolved to obtain a pitch-based carbon tetrachloride solution; 50g of a...

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Abstract

The invention discloses a sulfur / titanium dioxide / pyrolytic carbon composite positive electrode material for an aluminum ion battery, a preparation method for the sulfur / titanium dioxide / pyrolytic carbon composite positive electrode material, and the aluminum ion battery. The composite positive electrode material adopts a core-shell structure; the inner core of the core-shell structure is elemental sulfur while the shell of the core-shell structure is a coating layer which is formed by nanometer titanium dioxide, carbon nanotubes and porous asphalt pyrolytic carbon in a compounding manner, wherein the mass ratio of the elemental sulfur to the nanometer titanium dioxide to the carbon nanotubes is (0.5-5) to (1-5) to (0.1-1); and the mass ratio of the nanometer titanium dioxide to the porous asphalt for forming the pyrolytic carbon is (1-5) to (1-10). The composite positive electrode material has the characteristics of high electrical conductivity, stable structure, high compatibility with an electrolyte, and the like, so that the rate capability and cycle performance of the composite material are improved; and when the sulfur / titanium dioxide / pyrolytic carbon composite positive electrode material is used as the positive electrode material of the aluminum ion battery, the energy density, the low-temperature performance and the cycle performance of the battery are improved.

Description

technical field [0001] The invention belongs to the technical field of aluminum ion batteries, and specifically relates to a sulfur / titanium dioxide / pyrolytic carbon composite positive electrode material for aluminum ion batteries, and also relates to a preparation method of sulfur / titanium dioxide / pyrolytic carbon composite positive electrode materials for aluminum ion batteries And an aluminum ion battery using the composite cathode material. Background technique [0002] With the increasing market demand for high energy density batteries, there is an urgent need to develop power batteries and energy storage batteries with high energy, low cost, long life, green environmental protection, abundant battery material resources and recyclable utilization. The theoretical specific capacity of metal aluminum is second only to lithium, but its volume specific capacity is four times that of lithium, which is higher than any other metal material. As a negative electrode material and...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M10/05
CPCH01M4/364H01M10/05Y02E60/10
Inventor 王燕刘睿李志
Owner 深圳博磊达新能源科技有限公司
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