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Three-dimensional nano composite electrode material for electrochemical energy storage and preparation method thereof

A three-dimensional nano, composite electrode technology, used in electrode manufacturing, battery electrodes, electrochemical generators, etc., to achieve the effects of high assembly density, good electrical conductivity, and high energy density

Active Publication Date: 2019-11-05
昆明云大新能源有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Based on this, patents CN105047874A and CN102569796A respectively disclose methods for compounding lithium iron phosphate materials with graphene and carbon nanotubes to prepare composite electrodes, and patents CN107706397A and CN101764219A disclose ternary materials, graphite materials and A method for preparing a composite electrode through composite modification. The rate performance of the lithium-ion battery nano-carbon composite electrode material prepared by this method can be improved to a certain extent, but this type is obtained by composite modification of a single nano-carbon material and lithium-ion battery electrode material. The method of improving the power performance of lithium-ion batteries has limitations, and it is still difficult to meet the market's requirements for high-power, long-cycle, and high-energy-density lithium-ion batteries, especially in the field of new energy vehicles for high energy density, high power characteristics, and long cycle life. Strict requirements for lithium-ion power batteries

Method used

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  • Three-dimensional nano composite electrode material for electrochemical energy storage and preparation method thereof
  • Three-dimensional nano composite electrode material for electrochemical energy storage and preparation method thereof
  • Three-dimensional nano composite electrode material for electrochemical energy storage and preparation method thereof

Examples

Experimental program
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Embodiment 1

[0041] Embodiment 1, the preparation and testing of the high-performance new three-dimensional nano-composite electrode for the supercapacitor of the present invention:

[0042] 1. Preparation of high-performance new three-dimensional nanocomposite electrodes for supercapacitors of the present invention

[0043] 1.1 Preparation of three-dimensional nanocomposite electrodes of AC / CNT / CNF / SP / SBR / CMC (90 / 3.125 / 0.625 / 1.25 / 3 / 2)

[0044] A. Preparation of mixed solution of sodium carboxymethylcellulose (CMC) and styrene-butadiene rubber (SBR)

[0045] Accurately weigh 1 g of sodium carboxymethylcellulose (CMC) solid powder and add it to a 100 ml beaker, then weigh 99 g of ultrapure water and add it to the beaker, put a magnet with a length of 2 cm, and use a plastic film and The mouth of the beaker was sealed with a rubber ring, and the beaker was placed on a magnetic stirrer at a set speed of 100 r / min, and stirred at room temperature for 12 hours to obtain a CMC aqueous solution ...

Embodiment 2

[0100] Embodiment 2, the preparation and testing of high-performance new three-dimensional nano-composite electrodes for lithium-ion batteries of the present invention:

[0101] 1. Preparation of high-performance new three-dimensional nanocomposite electrodes for lithium-ion batteries

[0102] 1.1 Preparation of three-dimensional nanocomposite electrodes (LFP / rGO / CNT / SP / KS6 / PVDF=90 / 1 / 1 / 3 / 1 / 4) coated with reduced graphene oxide / carbon nanotubes coated lithium iron phosphate (aqueous phase)

[0103] A, the preparation of graphite oxide

[0104] Graphite oxide was prepared according to the method in step B a) of 1.2 in Example 1.

[0105] B. Preparation of LFP / rGO (90 / 1) composites:

[0106] In a 250 mL beaker, add 100 mL of ultrapure water and 10 mL of 80 wt% water and hydrazine solution, add the graphite oxide prepared in step A with a mass ratio of 1 wt% (0.2 g) to the above solution, After ultrasonic dispersion for 10 min, LFP material with a mass ratio of 90 wt% (18 g) wa...

Embodiment 3

[0155] The proportions of the components in the three-dimensional nanocomposite electrode material are: 0.005% carbon nanotube (CNT), 0.005% carbon nanofiber (CNF) or graphene (Graphene), 1% carbon black, and styrene-butadiene rubber. (SBR) binder 1%, activated carbon powder 97.99%. The supercapacitor of the present invention was prepared according to the process used in Example 1.

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Abstract

The invention discloses a three-dimensional nano composite electrode material for electrochemical energy storage and a preparation method thereof. The three-dimensional nano composite electrode material for electrochemical energy storage is formed by compounding two or more than two nano carbon materials, a conductive agent, a binder and a supercapacitor electrode material or a lithium ion batteryelectrode material. The preparation method of the three-dimensional nano composite electrode material for electrochemical energy storage comprises the steps: preparation of the three-dimensional nanocomposite electrode for the supercapacitor and preparation of the three-dimensional nano composite electrode for the lithium ion battery. According to the invention, two or more nano carbon materialsand a conductive agent are introduced to carry out composite modification on the supercapacitor or lithium ion battery electrode material; through the optimization of a compounding method and the full exerting of the synergistic effect of various nano carbon materials and the conductive agent, the three-dimensional nano composite electrode material disclosed by the invention is high in assembly density, good in conductivity, excellent in rate characteristic and electrochemical stability, simple in preparation process, green, environment-friendly, low in cost and suitable for large-scale production.

Description

technical field [0001] The invention relates to the technical field of electrochemical energy storage, in particular to a high-performance novel three-dimensional nanocomposite electrode material for supercapacitors or lithium-ion batteries and a preparation method thereof. Background technique [0002] Since the 20th century, the economy has developed rapidly, resources are on the verge of depletion, and pollution has become increasingly serious. It is imminent to find new renewable energy sources that can replace fossil energy sources such as oil, coal, and natural gas. At the same time, the rapid development of new energy technologies has brought about an urgent need for new energy storage technologies. [0003] Supercapacitor (also known as electrochemical capacitor) is a new type of energy storage element between conventional capacitors and chemical batteries that has been developed at home and abroad in recent decades. Due to its high power density (10 3 ~10 4 Wkg ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/30H01G11/32H01G11/86H01M4/04H01M4/134H01M4/1391H01M4/1393H01M4/1397H01M4/36H01M4/62H01M10/0525B82Y30/00B82Y40/00
CPCH01G11/30H01G11/32H01G11/86H01M4/362H01M4/1397H01M4/1391H01M4/1393H01M4/134H01M4/0404H01M4/62H01M4/625H01M10/0525B82Y30/00B82Y40/00Y02E60/13Y02E60/10
Inventor 卢文成方王从敏仇武忻
Owner 昆明云大新能源有限公司
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