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In-situ grown electrode plate made from active substances and manufacturing method thereof

An in-situ growth, active material technology, applied in battery electrodes, electrode carriers/current collectors, circuits, etc., can solve the problems of complex process and slurry coating process, impact on the performance of electrode materials, etc., to simplify the battery manufacturing process, specific capacity And the effect of improving cycle performance and excellent electrochemical performance

Inactive Publication Date: 2016-11-23
CHINA THREE GORGES UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The ratio of carbon material to conductive agent and binder, the process of mixing paste and paste coating process are all complicated and have a great influence on the performance of electrode materials

Method used

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  • In-situ grown electrode plate made from active substances and manufacturing method thereof
  • In-situ grown electrode plate made from active substances and manufacturing method thereof
  • In-situ grown electrode plate made from active substances and manufacturing method thereof

Examples

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Embodiment 1

[0033] The normal filter paper is decontaminated with hydrochloric acid reagent, and the treatment time is 12 hours, after which the filter paper is rinsed clean. Will Li 2 CO 3 , NH 4 VO 3 , NH 4 h 2 PO 4 With a molar ratio of 1.5:2:3, ball mill in absolute ethanol medium for 10 h and mix evenly, then transfer to an oven at 50 °C and keep it warm for about 12 h. h, to obtain a pre-calcined product, adding 10% glucose as an organic carbon source to the pre-calcined product, ball milling with absolute ethanol as a medium for 6 h, and drying at 50°C to obtain a precursor powder. Transfer the precursor powder to N-methylpyrrolidone (NMP) medium and stir to form a slurry, then impregnate the filter paper in the slurry for ultrasonication, dry at 80°C, and punch the disc. The disc is placed in an inert atmosphere (nitrogen atmosphere) in a tube furnace ) at 700°C for 10 h, and cooled naturally to room temperature to obtain an electrode sheet in which the positive electrode m...

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Abstract

The invention provides an in-situ grown electrode plate made from active substances. An active material precursor uniformly coats normal filter paper in a soaking way; active materials formed by calcining grow in situ on carbon fibers which are obtained by carbonization of the filter paper and serve as a current collector; and an obtained composite material of the active materials and the carbon fibers is the in-situ grown electrode plate made from the active substances. The method comprises the following steps: transferring precursor powder into N-methyl pyrrolidone (NMP) serving as a medium, and stirring to obtain a sizing agent; soaking filter paper in the sizing agent, and performing ultrasonic treatment, drying and stamping to obtain a wafer; and sintering the wafer in a tubular furnace under an inert atmosphere at the temperature of 500-800 DEG C for 5-24 hours to obtain the electrode plate of which a positive electrode material grows in situ on the carbon fibers, namely, the in-situ grown electrode plate made from the active substances. Compared with a general electrode plate manufacturing method, the manufacturing method has the advantages that the carbon fibers obtained by carbonization of the filter paper are taken as the current collector, and the manufacturing of the electrode plate is directly finished by a sintering process of the active materials, so that the battery manufacturing process is simplified greatly, and the battery manufacturing cost is lowered.

Description

technical field [0001] The invention relates to an electrode sheet prepared by in-situ growth and a preparation method thereof, and belongs to the field of preparation of battery cathode materials. Background technique [0002] With the increasing demand for energy and the continuous improvement of social and economic sustainable development, green energy with high performance and low cost has attracted more and more attention. [0003] Lithium-ion batteries have become the most ideal energy storage devices after the 20th century due to their advantages such as high working voltage, large specific energy, small self-discharge, long cycle life and environmental friendliness. In recent years, lithium-ion batteries have been widely used in portable electronic devices, such as notebook computers, mobile phones and other electronic products, and will further become a strong competitor in the power supply of electric vehicles and defense industries in the future. As lithium-ion b...

Claims

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Application Information

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IPC IPC(8): H01M4/136H01M4/66H01M4/1397
CPCH01M4/136H01M4/1397H01M4/663Y02E60/10
Inventor 张露露李振杨学林孙华斌丁晓凯周英贤
Owner CHINA THREE GORGES UNIV
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