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Preparation method of zinc oxide anode material for lithium ion secondary battery

A technology for negative electrode materials and secondary batteries, which is applied in the field of preparation of zinc oxide negative electrode materials for lithium-ion secondary batteries, can solve the problems of volume expansion change, poor conductivity, etc., and achieve buffer expansion effects, improve uniformity, and good rate performance Effect

Inactive Publication Date: 2018-09-07
HEFEI GUOXUAN HIGH TECH POWER ENERGY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a method for preparing a zinc oxide negative electrode material for a lithium-ion secondary battery, which solves the technical problems caused by poor electrical conductivity and volume expansion changes of the zinc oxide negative electrode material prepared by the prior art method

Method used

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  • Preparation method of zinc oxide anode material for lithium ion secondary battery
  • Preparation method of zinc oxide anode material for lithium ion secondary battery
  • Preparation method of zinc oxide anode material for lithium ion secondary battery

Examples

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Embodiment 1

[0028] A preparation method for a zinc oxide negative electrode material for a lithium ion secondary battery, specifically comprising the following steps:

[0029] (1) Weigh 0.25mmol of zinc nitrate and 0.25mmol of 3,5-pyridinedicarboxylic acid, place them in a polytetrafluoroethylene reactor containing 15mL of deionized water, and stir thoroughly for 1 hour to mix the reaction materials evenly;

[0030] (2) Put the polytetrafluoroethylene reaction kettle in a blast drying oven, heat it at 100°C for 72 hours, and finally cool it with the furnace, then filter, wash and dry to obtain a zinc polymer single crystal dispersion;

[0031] (3) Transfer the zinc polymer single crystal dispersion to a microwave reactor, add 0.002 mmol of iron salt to the solution and stir for 2 hours until it is evenly stirred, then set the frequency of the microwave reaction to 50 MHz and react in the microwave Reaction in the kettle for 10 hours, finally standing for cooling, then filtering, washing a...

Embodiment 2

[0038] A preparation method for a zinc oxide negative electrode material for a lithium ion secondary battery, specifically comprising the following steps:

[0039] (1) Weigh 0.4mmol of zinc sulfate and 0.2mmol of 4-pyridinecarboxylic acid into a polytetrafluoroethylene reactor containing 18mL of dimethylformamide (DMF), and stir thoroughly for 10 hours to mix the reaction materials evenly ;

[0040] (2) Put the polytetrafluoroethylene reaction kettle in a blast drying oven, heat it at 200°C for 10 hours, and finally cool it with the furnace, then filter, wash and dry to obtain a zinc polymer single crystal dispersion;

[0041] (3) Transfer the zinc polymer single crystal dispersion to a microwave reactor, and add 0.003 mmol of copper salt to the solution and stir for 10 hours until it is evenly stirred, then set the frequency of the microwave reaction to 100MHz and Reaction in the reactor for 72 hours, and finally let it stand for cooling, then filter, wash and dry to obtain ...

Embodiment 3

[0044] A preparation method for a zinc oxide negative electrode material for a lithium ion secondary battery, specifically comprising the following steps:

[0045] (1) Weigh 0.3mmol of zinc sulfate and 0.1mmol of 3,3',5,5'-tetramethyl-4,4'-pyrazole in a polytetrafluoroethylene reactor containing 20ml of methanol , fully stirred for 1 hour, so that the reaction raw materials were mixed evenly;

[0046](2) Put the polytetrafluoroethylene reaction kettle in a blast drying oven, heat it at 180°C for 48 hours, and finally cool it with the furnace, then filter, wash and dry to obtain a zinc polymer single crystal dispersion;

[0047] (3) Transfer the zinc polymer single crystal dispersion to a microwave reactor, and add 0.002 mmol of cobalt salt to the solution and stir for 5 hours until it is evenly stirred, then set the microwave reaction frequency to 70MHz and React in the reactor for 48 hours, and finally let it stand for cooling, then filter, wash and dry to obtain the iron-zi...

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Abstract

The invention discloses a preparation method of a zinc oxide anode material for a lithium ion secondary battery. The preparation method comprises the following steps of firstly, synthesizing a zinc polymer monocrystalline dispersion solution by a compound containing carboxylic acid or nitrogen and carboxylic acid and a zinc source under hydrothermal and solvothermal conditions; adding a compound doped with metal ions into the zinc polymer monocrystalline dispersion solution, reacting under the microwave condition, washing the obtained zinc polymer after reaction, drying, and calcining, so as to obtain the carbon-coated zinc oxide anode material doped with the metals. The preparation method has the advantages that the zinc coordination-containing polymer monocrystalline is prepared, the zinc ions in the polymer framework are exchanged by the metal ions under the microwave condition, a carbon network with higher content of graphitized carbon is obtained by decomposing under the nitrogencondition at high temperature, and the zinc oxide particles are filled into the decomposed carbon network, so as to improve the conductivity and structure stability of the carbon-coated zinc oxide anode material; the crystal cell parameters and charge distribution in local areas of lattice are changed by the doped metal ions, so as to obviously improve the primary efficiency of the zinc oxide, andgreatly improve the cycle property of the battery.

Description

technical field [0001] The invention relates to the field of processing and manufacturing of lithium-ion batteries, in particular to a preparation method of a zinc oxide negative electrode material for a lithium-ion secondary battery. Background technique [0002] With the development of portable electronic devices and electric vehicles, the demand for high-energy and high-power batteries has become increasingly urgent, which has inspired a large number of researchers to invest in the exploration and research of lithium-ion battery anode materials. Graphite is currently the most widely used commercial lithium-ion battery anode material. However, the theoretical capacity of graphite is only 375mAh / g, which cannot meet the application requirements of batteries in today's society, especially the high specific capacity requirements of power energy. Compared with graphite, ZnO is quite abundant in storage and has a higher theoretical capacity, and is considered to be a very comp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/38H01M4/42H01M10/0525
CPCH01M4/38H01M4/42H01M10/0525Y02E60/10
Inventor 许鹏
Owner HEFEI GUOXUAN HIGH TECH POWER ENERGY
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