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Electrode composite material, preparation method thereof, anode possessing the electrode composite material and cell

A technology of composite materials and electrodes, applied in non-aqueous electrolyte batteries, nanotechnology for materials and surface science, battery electrodes, etc., can solve problems such as loss of active materials

Active Publication Date: 2015-02-25
POSITEC POWER TOOLS (SUZHOU) CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The present invention aims to provide an electrode composite material, which has good thermal stability and good electrochemical performance, can effectively solve the problem of active material loss during battery charge and discharge, and improve the discharge capacity of the battery

Method used

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  • Electrode composite material, preparation method thereof, anode possessing the electrode composite material and cell
  • Electrode composite material, preparation method thereof, anode possessing the electrode composite material and cell
  • Electrode composite material, preparation method thereof, anode possessing the electrode composite material and cell

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preparation example Construction

[0029] A preparation method of an electrode composite material, the preparation method comprising the following steps: mixing an M13 phage suspension with an elemental sulfur water dispersion solution, encapsulating the mixture and drying to obtain an M13 phage / sulfur electrode composite material.

[0030] In a specific embodiment, the volume ratio of the M13 phage suspension to the elemental sulfur water dispersion solution is 20:1˜30:1. Further preferably, the volume ratio of the M13 phage suspension to the elemental sulfur water dispersion solution is 25:1.

[0031] In a specific embodiment, the mass percentage of elemental sulfur in the aqueous dispersion of elemental sulfur is 8% to 12%, and more preferably, the mass percentage of elemental sulfur in the aqueous dispersion of elemental sulfur is 10%. Preferably, the elemental sulfur water dispersion solution is a nanometer elemental sulfur water dispersion solution.

[0032] In a specific embodiment, the mixing is realiz...

Embodiment 1

[0058] Preparation of the electrode composite material: Add 10 mL of M13 phage suspension to the centrifuge tube, then add 400 μL of 10% by weight nanometer elemental sulfur water dispersion solution to the centrifuge tube, shake the table for 2 hours to mix evenly, use The centrifuge tube was packaged, and the centrifuge tube was placed in a conventional oven at 70° C. to dry for two days to obtain the M13 phage / sulfur electrode composite material.

[0059] figure 1 It is the infrared spectrogram of nano elemental sulfur, M13 phage and M13 phage / sulfur electrode composite. It can be seen from the figure that the infrared spectrum of the M13 phage / sulfur electrode composite material shows the combined characteristic bands of pure M13 phage and nanometer elemental sulfur. The combined infrared spectrum indicates that elemental sulfur may be embedded in the M13 phage, That is to say, in the M13 phage / sulfur electrode composite material, a good binding effect is formed between ...

Embodiment 2

[0062] The preparation of positive electrode: be the M13 phage / sulfur electrode composite material in the embodiment 1 of 80% by weight percentage, the polyvinylidene fluoride (PVdF) (Kynar, HSV900) (Kynar, HSV900) and weight percentage of 10% as binding agent and weight percentage are 10% Super Lithium carbon black (MTI, with a purity of 99.5%) was mixed, and N-methyl-2-pyrrolidone (NMP, Sigma, with a purity of 99.5%) was used as a dispersant to prepare a cathode slurry. The prepared cathode slurry was coated on a circular nickel foam (MTI, purity 99%) with a diameter of 1 cm. After drying in a vacuum oven at 60°C for 5 hours, press the positive electrode sheet under a pressure of 8 MPa to obtain the positive electrode. The M13 phage / sulfur electrode composite material loaded on the positive electrode sheet is about 2 mg / cm 2 .

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Abstract

The invention provides an electrode composite material, which comprises M13 bacteriophage and elemental sulfur. The electrode composite material has good thermal stability and good electrochemistry performance, the problem of active material loss during charge and discharge process of cell can be effectively solved, and discharge capacity of the cell is increased. The invention also provides a preparation method of the electrode composite material, an anode possessing the electrode composite material and a cell.

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 positive 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] The currently commercialized lithium-io...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M10/052B82Y30/00B82Y40/00
CPCB82Y30/00H01M4/38H01M4/628H01M10/0525Y02E60/10
Inventor 董德贤陈璞
Owner POSITEC POWER TOOLS (SUZHOU) CO LTD
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