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.
CN106920950AActive Publication Date: 2017-07-04SHANGHAI UNIVERSITY OF ELECTRIC POWER
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
SHANGHAI UNIVERSITY OF ELECTRIC POWER
Publication Date
2017-07-04

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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.
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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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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