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Method for preparing LiNi1/3Co1/3Mn1/3O2 fibrous material by electrostatic spinning

A technology of electrospinning and fiber materials, applied in the direction of spinning solution preparation, fiber treatment, filament/thread forming, etc., to achieve the effect of large specific surface area, conducive to transmission, and small fiber diameter

Active Publication Date: 2014-12-03
DAXIN MANGANESE MINE BRANCH OF CITIC DAMENG MINING IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with other preparation methods, electrospinning technology can prepare positive electrode materials that better meet the electrochemical performance requirements of lithium-ion power batteries, but there are few reports on the technology of electrospinning for the preparation of nickel-cobalt lithium manganese oxide nanofibers

Method used

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  • Method for preparing LiNi1/3Co1/3Mn1/3O2 fibrous material by electrostatic spinning
  • Method for preparing LiNi1/3Co1/3Mn1/3O2 fibrous material by electrostatic spinning
  • Method for preparing LiNi1/3Co1/3Mn1/3O2 fibrous material by electrostatic spinning

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Experimental program
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Embodiment 1

[0031] Preparation of LiNi by Electrospinning 1 / 3 co 1 / 3 mn 1 / 3 o 2 A method for a fibrous material, comprising the steps of:

[0032] (1) Configuration of spinning solution: Measure 25ml of deionized water in a beaker, add polyvinylpyrrolidone (PVP) with a quality of 10% of water, then add 0.2mol of lithium carbonate, nickel nitrate, cobalt acetate and nitric acid Manganese, so that the concentration of Li element in the solution is 1.6mol / L, and the concentration of Ni, Co, and Mn elements is 0.8mol / L; when adding each time, ensure that the previously added substance is completely dissolved; keep stirring for 8h and then let it stand for 4h spinning solution;

[0033](2) Electrospinning: Electrospinning is carried out in an environment with a temperature of 20-25°C and a humidity of ≤30%. Add the spinning solution prepared in step (1) into the syringe, and the needle of the syringe is connected to the positive pole of the power supply. The receiving device is connected ...

Embodiment 2

[0036] Preparation of LiNi by Electrospinning 1 / 3 co 1 / 3 mn 1 / 3 o 2 A method for a fibrous material, comprising the steps of:

[0037] (1) Configuration of spinning solution: Measure 25ml of deionized water in a beaker, add polyvinylpyrrolidone (PVP) with a mass of 10% of water, then add 0.2mol of lithium acetate, nickel acetate, cobalt nitrate and acetic acid Manganese, so that the concentration of Li element in the solution is 1.6mol / L, and the concentration of Ni, Co, and Mn elements is 0.8mol / L; when adding each time, ensure that the previously added substance is completely dissolved; keep stirring for 8h and then let it stand for 4h spinning solution;

[0038] (2) Electrospinning: Electrospinning is carried out in an environment with a temperature of 20-25°C and a humidity of ≤30%. Add the spinning solution prepared in step (1) into the syringe, and the needle of the syringe is connected to the positive pole of the power supply. The receiving device is connected to t...

Embodiment 3

[0041] Preparation of LiNi by Electrospinning 1 / 3 co 1 / 3 mn 1 / 3 o 2 A method for a fibrous material, comprising the steps of:

[0042] (1) Configuration of spinning solution: Measure 25ml of deionized water in a beaker, add polyvinylpyrrolidone (PVP) whose quality is 10% of water, then add 0.2mol of lithium hydroxide, nickel carbonate, cobalt carbonate and Manganese carbonate, so that the concentration of the Li element in the solution is 1.6mol / L, and the concentration of Ni, Co, and Mn elements is 0.8mol / L; when adding each time, ensure that the previously added substance is completely dissolved; keep stirring for 8 hours and then let it stand 4h to get spinning solution;

[0043] (2) Electrospinning: Electrospinning is carried out in an environment with a temperature of 20-25°C and a humidity of ≤30%. Add the spinning solution prepared in step (1) into the syringe, and the needle of the syringe is connected to the positive pole of the power supply. The receiving device...

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Abstract

The invention discloses a method for preparing a LiNi1 / 3Co1 / 3Mn1 / 3O2 fibrous material by electrostatic spinning and belongs to the technical field of lithium ion battery electrode materials and preparation thereof. The method includes: taking deionized water as a dissolvent, regulating solution viscosity through polyvinylpyrrolidone, then adding a lithium source, a nickel source, a cobalt source and a manganese source to prepare a spinning solution, preparing a nanofiber film by a electrostatic spinning technique, and then sintering the nanofiber film to obtain the LiNi1 / 3Co1 / 3Mn1 / 3O2 fibrous material. The fibrous material prepared by the method is smooth in surface, small in fibre diameter and large in specific surface area and has good charge and discharge performance and large storage capacity, the preparation method is simple in technology, reaction condition parameters are easy to control, sintering temperature is low, and large-scale industrialization of cathode materials of lithium nickelate, lithium cobaltate and lithium manganate are benefited.

Description

technical field [0001] The invention belongs to the technical field of lithium-ion battery electrode materials and preparation thereof, in particular to an electrospinning technique for preparing LiNi 1 / 3 co 1 / 3 mn 1 / 3 o 2 method of fibrous materials. Background technique [0002] LiNi 1 / 3 co 1 / 3 mn 1 / 3 o 2 It is a new type of cathode material for lithium-ion batteries. It has the advantages of high theoretical capacity, stable structure, good cycle performance, wide discharge voltage range, low price, and environmental friendliness. It is considered to be the most promising cathode material for lithium-ion batteries and is expected to be used in lithium-ion batteries as power on the electric vehicle. [0003] Traditional preparation methods mainly include the following: high-temperature solid-phase synthesis, sol-gel method, co-precipitation method, hydrothermal method, etc. However, these methods have some inherent disadvantages, such as: high synthesis temperatu...

Claims

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Application Information

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IPC IPC(8): D04H1/728D01D5/00D01D1/02D06C7/00H01M4/505H01M4/525
CPCY02E60/10
Inventor 李华成王正国李普良陈南雄王春飞卢道焕张丽云
Owner DAXIN MANGANESE MINE BRANCH OF CITIC DAMENG MINING IND
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