Lead-titanium-silicon-carbon composite and preparation method thereof

A technology of silicon-carbon composite materials and composite materials, applied in the direction of lead-acid batteries, electrical components, electrochemical generators, etc., to achieve the effect of inhibiting salinization

Active Publication Date: 2017-07-11
ANHUI LEOCH POWER SUPPLY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In summary, these three composite materials have improved the negative electrode performance of lead-acid batteries to varying degrees, but they are only suitable for pulse charge-discharge cycles within 3% of the charge-discharge depth in the 50% SOC state.

Method used

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  • Lead-titanium-silicon-carbon composite and preparation method thereof
  • Lead-titanium-silicon-carbon composite and preparation method thereof
  • Lead-titanium-silicon-carbon composite and preparation method thereof

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preparation example Construction

[0057] An embodiment of the present invention also provides a method for preparing a lead-titanium-silicon-carbon composite material, the steps of which at least include:

[0058] S1. Preparation of silicon-carbon composite material. 80-90 parts of carbon material and 10-20 parts of silicon dioxide are evenly mixed for 2 hours to obtain a silicon-carbon composite material. The carbon material includes at least one of flake graphite, expandable graphite, colloidal graphite, acetylene black, superconducting carbon black, mesocarbon microspheres, spherical graphite, capacitor grade activated carbon, carbon fiber, carbon nanotube and graphene. In one specific embodiment, the carbon material is obtained by mixing 20-30 parts of spherical graphite, 15-40 parts of acetylene black, 15-50 parts of activated carbon and 15-40 parts of carbon fiber. In the second specific embodiment, the carbon material is obtained by mixing 20-30 parts of spherical graphite, 20-30 parts of acetylene bla...

Embodiment 1

[0064] This embodiment discloses a method for preparing a lead-titanium-silicon-carbon composite material, and the specific steps include:

[0065] S10, preparing a silicon-carbon composite material. Mix carbon materials according to the following mass ratios:

[0066] Spherical graphite is 25%, its carbon content is greater than 99%, the particle size D50 is 15-20um, and the specific surface area is 4-6.5m 2 / g;

[0067] Acetylene black is 25%, its average particle size is 25-30nm, and its specific surface area is 250-300m 2 / g;

[0068] Activated carbon is 25%, its pore size is 2-2.2nm, and its pore volume is 1-1.2cm 3 / g, the specific surface area is 2000m 2 / g or more, the inorganic mass specific capacitance is 280F / g;

[0069] Carbon fiber is 25%, and its specific surface area is 15-20m 2 / g, the length is 5-8um, the diameter is 150nm, the conductivity is 1*10 -4 Ω / cm;

[0070] A mixed material is obtained after uniform stirring, and silicon dioxide is added to t...

Embodiment 2

[0075] In the preparation method disclosed in this embodiment, the difference from the first embodiment lies in the steps of preparing the silicon-carbon composite material, and the rest of the specific steps are the same.

[0076] S11, preparing a silicon-carbon composite material. Mix carbon materials according to the following mass ratios:

[0077] Spherical graphite is 25%, its carbon content is greater than 99%, the particle size D50 is 15-20um, and the specific surface area is 4-6.5m 2 / g;

[0078] Acetylene black is 35%, its average particle size is 25-30nm, and its specific surface area is 250-300m 2 / g;

[0079] Activated carbon is 20%, its pore size is 2-2.2nm, and its pore volume is 1-1.2cm 3 / g, the specific surface area is 2000m 2 / g or more, the inorganic mass specific capacitance is 280F / g;

[0080] Carbon fiber is 35%, and its specific surface area is 15-20m 2 / g, the length is 5-8um, the diameter is 150nm, the conductivity is 1*10 -4 Ω / cm;

[0081] A ...

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Abstract

The invention provides a lead-titanium-silicon-carbon composite and a preparation method thereof. The preparation method comprises the following steps: mixing a carbon material with silica; then adding a titanyl sulfate solution; carrying out washing with an ammonia water solution; then carrying out calcining under a nitrogen condition so as to obtain a titanium-silicon-carbon composite; then adding a lead salt solution; carrying out washing with an acid solution and carrying out drying so as to obtain a lead sulfate / carbon-based material composite electrode material; mixing the lead sulfate / carbon-based material composite electrode material with a metal oxide and jetting silica onto the surface of the mixture so as to obtain the lead-titanium-silicon-carbon composite. The lead-titanium-silicon-carbon composite prepared in the invention has the advantage of capacity of improving electrical conductivity, the capability of charge acceptance and charge / discharge rate, converting a lead salt into active lead and inhibiting salinization caused by increase of a lead salt crystal; the lead-titanium-silicon-carbon composite bonded with lead has improved bonding force and can maintain certain strength in the process of charging and discharging, which enables the composite to be prevented from loosing and falling under impact of currents; the overpotential of hydrogen evolution is increased, and a negative electrode is prevented from too-early hydrogen loss; and cycle life is improved.

Description

technical field [0001] The invention relates to the technical field of electrochemical storage batteries, in particular to a lead-titanium-silicon-carbon composite material and a preparation method thereof. Background technique [0002] With the rapid development of the global economy and society, energy is increasingly scarce and the ecological environment is deteriorating. Therefore, people pay more and more attention to the use of renewable resources such as solar energy and wind energy. However, the energy generated by solar energy and wind energy cannot be directly incorporated into the power grid for people's production and daily life. Energy storage equipment is required to store the energy first. [0003] At present, the commonly used and relatively mature batteries in this field are mainly divided into lithium-ion batteries, flow batteries, nickel-hydrogen batteries and lead-acid batteries. There are greater advantages, so so far, lead-acid batteries still occupy m...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/58H01M4/583H01M4/48H01M4/56H01M4/62H01M10/06
CPCH01M4/364H01M4/366H01M4/48H01M4/56H01M4/5825H01M4/583H01M4/624H01M4/628H01M10/06H01M2220/10Y02E60/10
Inventor 汪利民林晓东魏士洋
Owner ANHUI LEOCH POWER SUPPLY
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