Super capacitance battery and preparation method thereof

A technology of supercapacitor battery and conductive agent, which is applied in the field of capacitors and can solve the problems of low energy density and low power density

Inactive Publication Date: 2013-03-27
OCEANS KING LIGHTING SCI&TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this electrochemical hybrid capacitor suf

Method used

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  • Super capacitance battery and preparation method thereof
  • Super capacitance battery and preparation method thereof

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preparation example Construction

[0030] like figure 1 Shown, the preparation method of above-mentioned super capacitor battery, comprises the steps:

[0031]Step S1, preparing a positive electrode active material by mixing a carbon material and a lithium ion material, the content of the carbon material in the positive electrode active material is greater than or equal to 70% and less than 100%, and the mass ratio is 1-20:80- The 99% silicon mixture is mixed with graphene to prepare the negative electrode active material, and the silicon mixture is composed of simple silicon and silicon dioxide with a mass ratio of 1:19-19:1. In this embodiment, the preparation process of the negative electrode active material also includes the following steps: preparing a mixture of silicon dioxide powder and graphite oxide powder, ball-milling the mixture and placing it in a tube furnace with a reducing atmosphere at 10-100°C. Slowly raise the temperature to 200-1200° C. at a rate of 1-10 hours, heat for 1-10 hours to obtai...

Embodiment 1

[0038] Positive electrode: Mix positive active material activated carbon, binder PVDF and conductive agent acetylene black at a mass ratio of 85:10:5, add solvent NMP to adjust the viscosity of the slurry to 2500 Ns / square meter, and coat it on aluminum foil. Then it is dried and rolled into a film, and cut into positive electrodes.

[0039] Negative electrode: (1) Mix silicon dioxide powder and graphite oxide powder with a mass ratio of 1:10, ball mill and place in a reducing atmosphere (a mixture of hydrogen and argon with a volume percentage of 5:95) tube furnace Slowly raise the temperature to 200°C at a rate of 10°C / min, and then heat it for 1 hour to obtain a powder mixture, and then cool the powder mixture to room temperature with the furnace in a reducing atmosphere to obtain a negative active electrode composed of a silicon mixture and graphene. material, wherein the mass ratio of silicon mixture and graphene is 20:80, and the mass ratio of elemental silicon and silic...

Embodiment 2

[0045] Positive electrode: active carbon and lithium iron phosphate material with a mass ratio of 70:30 are prepared as the positive electrode active material. Mix the positive electrode active material, binder PVDF and conductive agent acetylene black in a mass ratio of 90:5:5, add solvent NMP to adjust the viscosity of the slurry to 1500 Ns / square meter, coat the aluminum foil, then dry and Rolled film, cut into positive electrode.

[0046] Negative electrode: (1) Mix silicon dioxide powder and graphite oxide powder with a mass ratio of 1:10, and place them in a reducing atmosphere (a mixture of hydrogen and argon with a volume percentage of 5:95) after ball milling. Slowly raise the temperature in the furnace to 400°C at a rate of 20°C / min, then heat it for 2 hours to obtain a powder mixture, and then cool the powder mixture to room temperature with the furnace in a reducing atmosphere to obtain a negative electrode composed of a silicon mixture and graphene Active materia...

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Abstract

Disclosed is a super capacitance battery. An anode comprises an anode current collector and an anode material coated on the anode current collector, the anode material comprises an anode active material, a first binder and a first conductive agent, the anode active material is composed of a carbon material and a lithium ion material, the content of the carbon material in the anode active material is larger than or equal to 70% and smaller than 100%, a cathode comprises a cathode current collector and a cathode material coated on the cathode current collector, the cathode material comprises a cathode active material, a second binder and a second conductive agent, the cathode active material is composed of a silicon mixture and graphene according to the mass ratio of 1-20:80-99, and the silicon mixture is composed of monatomic silicon and silicon dioxide according to the mass ratio of 1:19-19:1. The cathode of the super capacitance battery is provided with a low potential platform, so that average working voltage of the super capacitance battery is increased, and the super capacitance battery has high-ratio power characteristics and high-ratio energy characteristics. In addition, the invention further provides a preparation method for the super capacitance battery.

Description

【Technical field】 [0001] The invention relates to the field of capacitors, in particular to a super capacitor battery and a preparation method thereof. 【Background technique】 [0002] In the 1990s, the development of electric vehicles and the need for power pulse power supplies further stimulated research on electrochemical capacitors. At present, the specific energy of electrochemical capacitors is still relatively low, and the specific power of batteries is low. People are trying to solve this problem from two aspects: (1) When batteries and supercapacitors are used in combination, during normal operation, the batteries provide the required energy. The power; when starting or needing a large current discharge, it is provided by a capacitor. On the one hand, it can improve the shortcoming of the battery’s poor low-temperature performance; it can solve the application of pulse current with high power requirements, such as GSM, GPRS, etc. . The joint use of capacitors and b...

Claims

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Application Information

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IPC IPC(8): H01G9/04H01G9/042
Inventor 周明杰钟玲珑王要兵
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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