Preparation method of high-cycle and high-rate carbon-based negative electrode energy storage composite material

A composite material, high-rate technology, applied in the field of materials science, can solve the problem of unstoppable capacity fading, and achieve excellent cycle stability, high lithium and sodium storage capacity, and uniform distribution.

Active Publication Date: 2017-07-04
SHANGHAI UNIVERSITY OF ELECTRIC POWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, as high-capacity materials such as metal oxides, intrinsic materials have natural defects. Under charge-discharge cycles, the capacity decay is irr...

Method used

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  • Preparation method of high-cycle and high-rate carbon-based negative electrode energy storage composite material
  • Preparation method of high-cycle and high-rate carbon-based negative electrode energy storage composite material
  • Preparation method of high-cycle and high-rate carbon-based negative electrode energy storage composite material

Examples

Experimental program
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Effect test

Embodiment 1

[0041] A method for preparing a high-cycle, high-rate carbon-based negative electrode energy storage composite material. The battery negative electrode material involves three main elements: Ni, C, and O. See the experimental procedure figure 1 , including the following steps:

[0042] (1) Collect polymer water-absorbent resin particles, weigh 1 g, weigh 0.1 g of nickel nitrate crystals, dissolve them in 10 ml of distilled water, then pour them into the polymer particles, mix well, and shake with a shaker.

[0043] (2) When the polymer is added to the nickel nitrate aqueous solution, a hydrogel is formed, and then the hydrogel is transferred to the refrigerator to freeze into an ice gel, and finally the solid ice is dried and sublimated by a freeze-drying machine (that is, the water in the original aqueous solution is removed. solvent) to obtain dry gel precursor particles.

[0044] (3) The precursor particles were transferred to a tube furnace and calcined at a high tempera...

Embodiment 2

[0054] A method for preparing a high-cycle, high-rate carbon-based negative electrode energy storage composite material. The battery negative electrode material involves three main elements: Ni, C, and O. Specifically include the following steps:

[0055] (1) Collect polymer water-absorbent resin particles, weigh 3 g, weigh 0.5 g of nickel nitrate crystals, dissolve in 30 ml of distilled water, then pour into polymer particles, and mix well. Shake using a shaker.

[0056] (2) When the polymer is added to the nickel nitrate aqueous solution, a hydrogel is formed, and then the hydrogel is transferred to the refrigerator to freeze into an ice gel, and finally the solid ice is dried and sublimated by a freeze-drying machine (that is, the water in the original aqueous solution is removed. solvent) to obtain dry gel precursor particles.

[0057] (3) The precursor particles were transferred to a tube furnace and calcined at high temperature. The calcination parameters were set as f...

Embodiment 3

[0063] A method for preparing a high-cycle, high-rate carbon-based negative electrode energy storage composite material. The battery negative electrode material involves three main elements: Ni, C, and O. Specifically include the following steps:

[0064] (1) Collect polymer water-absorbent resin particles, weigh 3 g, weigh 0.5 g of nickel nitrate crystals, dissolve in 30 ml of distilled water, then pour into polymer particles, and mix well. Shake using a shaker.

[0065] (2) When the polymer is added to the nickel nitrate aqueous solution, a hydrogel is formed, and then the hydrogel is transferred to the refrigerator to freeze into an ice gel, and finally the solid ice is dried and sublimated by a freeze-drying machine (that is, the water in the original aqueous solution is removed. solvent) to obtain dry gel precursor particles.

[0066] (3) The precursor particles were transferred to a tube furnace and calcined at high temperature. The calcination parameters were set as f...

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Abstract

The invention relates to a preparation method of a high-cycle and high-rate carbon-based negative electrode energy storage composite material. The preparation method comprises the following steps: preparing nickel salt hydrogel; preparing a dry gel precursor; transferring xerogel precursor particles into a tubular furnace, carrying out high temperature calcination, and cooling the obtained calcined product; taking out the preliminarily calcined product, grinding the preliminarily calcined product in a dry environment, pickling the ground product, and drying the pickled product; activating the dried calcined product under KOH grinding and mixing; transferring the potassium hydroxide ground and mixed product into the tubular furnace, and calcining the mixed product; naturally cooling the calcined mixed product to room temperature; and pickling the cooled product, washing the pickled product with distilled water or ethanol until the washed product is neutral, and drying the neutral product to obtain the high-cycle and high-rate carbon-based negative electrode energy storage composite material. Compared with other negative electrode energy storage composite materials, the carbon-based negative electrode energy storage composite material has the advantages of extremely high initial capacity, excellent cycle stability and good rate performance. The preparation method has the advantages of simplicity, low cost, excellent performances, and suitableness for producing large-scale commercial batteries.

Description

technical field [0001] The invention belongs to the field of materials science, and relates to a battery material, in particular to a preparation method of a high-cycle, high-rate carbon-based negative electrode energy storage composite material. Background technique [0002] Super Absorbent Polymer (SAP) is a new type of functional polymer water-absorbing material. It has a high water absorption function of absorbing water hundreds to thousands of times heavier than itself, and has excellent water retention performance. Once it absorbs water and swells into a hydrogel, it is difficult to separate the water even if it is pressurized. Therefore, it is widely used in various fields such as personal hygiene products, industrial and agricultural production, and civil engineering. Superabsorbent resin is a kind of macromolecule containing hydrophilic groups and cross-linked structure. It was first prepared by Fanta et al. by grafting polyacrylonitrile with starch and then sapo...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/38H01M4/52H01M4/583H01M4/62H01M10/0525H01M10/054C01G53/00B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00C01G53/003C01P2002/82C01P2002/85C01P2004/03C01P2006/40H01M4/362H01M4/38H01M4/523H01M4/583H01M4/625H01M10/0525H01M10/054Y02E60/10
Inventor 闵宇霖卫欢欢范金辰徐群杰时鹏辉杜金城
Owner SHANGHAI UNIVERSITY OF ELECTRIC POWER
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