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Electrode composite material and preparation method thereof, and negative electrode and battery having the electrode composite material

A composite material and electrode technology, applied in nanotechnology for materials and surface science, battery electrodes, secondary batteries, etc., can solve the problem of unsatisfactory electrochemical performance, large-scale production of manganese oxide-based electrode materials, etc. problems, to achieve the effect of large-scale production potential, rich modifiable points, and low cost of raw materials

Active Publication Date: 2017-12-19
POSITEC POWER TOOLS (SUZHOU) CO LTD +1
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Problems solved by technology

However, many synthesis methods of manganese oxides involve high-temperature processes or complex experimental designs, which hinder the large-scale production of manganese oxide-based electrode materials, and some of the existing research on manganese oxide-based electrode materials has insufficient electrochemical performance. Ideal, therefore, it is necessary to find a new type of manganese oxide electrode material and find a simpler and lower energy consumption preparation method

Method used

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  • Electrode composite material and preparation method thereof, and negative electrode and battery having the electrode composite material
  • Electrode composite material and preparation method thereof, and negative electrode and battery having the electrode composite material
  • Electrode composite material and preparation method thereof, and negative electrode and battery having the electrode composite material

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preparation example Construction

[0034] A preparation method of an electrode composite material, the preparation method comprising the following steps: mixing raw materials, the raw materials include M13 phage suspension and manganese source; adding alkali and hydrogen peroxide solution to the mixture in sequence; storing at 3°C ​​to 5°C; Wash; collect the precipitate; dry the precipitate to obtain M13 phage / Mn 3 o 4 electrode composites.

[0035] An electrode composite including M13 bacteriophage and Mn 3 o 4 , the electrode composite material also includes carbon nanotubes. The addition of carbon nanotubes can significantly improve the capacity and cycle performance of batteries assembled with electrode composite materials. Preferably, the carbon nanotubes are selected from at least one of single-wall carbon nanotubes or multi-wall carbon nanotubes. In electrode composite materials, M13 phage, Mn 3 o 4 And the mass ratio between carbon nanotubes is 9.99:90:0.01.

[0036] A preparation method of an e...

Embodiment 1

[0070] Preparation of electrode composite material: Mix 10 mL of M13 phage suspension with 100 mL of 0.10 M manganese sulfate solution. Then 100 μL of a solution of multi-walled carbon nanotubes (American Nanomaterials, 3% W.W) was added to the above mixture. Stirring was continued at room temperature for 24 hours. After stirring, 10 mL of 2.5 mol / L NaOH solution was added to the mixture, and stirred for 10 seconds. Subsequently, an additional 1.4 mL of 30% hydrogen peroxide solution was added. The resulting solution was stored at 4°C for 1.5 hours. The final product was washed twice with Milli-Q water and collected by centrifugation. The resulting powder was dried at 320 °C for 3 hours to obtain M13 phage / Mn 3 o 4 / carbon nanotube electrode composites.

[0071] figure 1 M13 phage / Mn in embodiment 1 3 o 4 / XRD patterns of carbon nanotube electrode composites. The vertical line in the figure corresponds to Mn3 o 4 The standard XRD pattern characteristic peak, from ...

Embodiment 2

[0073] The preparation of negative pole: be the M13 phage / Mn in the embodiment 1 of 70% by weight percentage 3 o 4 / carbon nanotube electrode composite, 10% by weight of polyvinylidene fluoride (PVdF) (Kynar, HSV900) as a binder and 20% by weight of Super Lithium carbon black (MTI, purity 99.5%) was mixed, and N-methyl-2-pyrrolidone (NMP, Sigma company, purity 99.5%) was used as a dispersant to prepare negative electrode slurry. The prepared negative electrode slurry was then coated on copper foil using doctor blade coating. Dry overnight in a vacuum oven at 60° C. to obtain a negative electrode.

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Abstract

The invention provides an electrode composite material which comprises a M13 bacteriophage and Mn3O4. The electrode composite material has a good nano structure and a good electrochemical performance, and can be used as a negative electrode material of a lithium ion battery; moreover, a preparation method of the electrode composite material is simple and feasible, and can be implemented at low temperature. The invention also provides the preparation method of an electrode composite material, and a negative electrode and a battery which comprise the electrode composite material.

Description

technical field [0001] The invention relates to an electrode composite material. [0002] The invention also relates to a preparation method of the electrode composite material. [0003] The invention also relates to a negative electrode and a battery comprising the electrode composite. Background technique [0004] In recent years, with the development of science and technology, the demand for energy, especially renewable green energy, has become more and more prominent. As an energy storage and conversion device, batteries are playing an irreplaceable role. As a new type of renewable secondary energy, lithium-ion batteries are currently the focus of development in the battery field because of their low cost, high-quality specific energy, high volume specific energy, high energy density, and long cycle life. It has been widely used in mobile phones, notebook computers, electric tools, digital cameras and electric vehicles. [0005] As cobalt oxides and iron oxides have b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/36H01M4/60H01M4/50H01M10/0525B82Y30/00
CPCB82Y30/00H01M4/362H01M4/502H01M4/60H01M4/625H01M10/0525Y02E60/10
Inventor 杰伊·J·Y·皇甫董德贤陈璞
Owner POSITEC POWER TOOLS (SUZHOU) CO LTD
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