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Lithium ion battery, and anode material and preparation method thereof

A technology for lithium-ion batteries and positive electrode materials, which is applied to battery electrodes, circuits, electrical components, etc., can solve the problems of high price, unfavorable cost reduction of lithium-ion batteries, and limited application range of lithium-ion, and achieves easy operation and preparation method Simple and feasible, excellent electrochemical performance

Active Publication Date: 2015-11-25
CONTEMPORARY AMPEREX TECH CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At the same time, currently the most widely used cathode material LiCoO 2 Due to the high price due to the content of Co, it is not conducive to the development of lithium-ion batteries in the direction of low cost, and limits the application range of lithium ions.

Method used

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  • Lithium ion battery, and anode material and preparation method thereof
  • Lithium ion battery, and anode material and preparation method thereof

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preparation example Construction

[0023] The preparation method of the positive electrode material of the lithium ion battery according to the second aspect of the present invention is used to prepare the positive electrode material of the lithium ion battery according to the first aspect of the present invention, comprising the steps of: (1) adding the cerium source to the organic solvent, Elevating the temperature to promote the dissolution of the cerium source to obtain a certain concentration of the cerium source solution; (2) adding a certain amount of porous carbon source to the cerium source solution, and then ultrasonically dispersing the porous carbon source to evenly disperse the porous carbon source in the cerium source solution to obtain the first mixture; (3) vacuumize the first mixture after heating up; (4) under the condition of continuous stirring, add fluorine source to the first mixture to obtain the second mixture; (5) leave the second mixture standing, and then separate, CeF was obtained by ...

Embodiment 1

[0044] 1. Preparation of cathode materials for lithium-ion batteries

[0045] (1) The cerium source Ce(NO 3 ) 3 Adding polyethylene glycol, a solvent with a weight average molecular weight of 600, and raising the temperature to 80°C to promote the dissolution of the cerium source, to obtain a cerium source solution with a molar concentration of 0.01M;

[0046] (2) Add cerium source Ce(NO 3 ) 3 The porous carbon source carbon nanotubes with a molar ratio of 1.5:1, and then ultrasonically dispersed for 60 minutes to uniformly disperse the porous carbon source in the cerium source solution to obtain the first mixture, wherein the specific surface area of ​​the carbon nanotubes is 1100m 2 / g, pore size 10nm≤r≤50nm;

[0047] (3) Elevate the temperature of the first mixture to 150°C and then vacuumize for 0.5h;

[0048] (4) Under the condition of continuous stirring at 100r / min, add the cerium source Ce(NO 3 ) 3 The mol ratio is the fluorine source NaF of 0.9:1, obtains the s...

Embodiment 2

[0059] Lithium-ion batteries were prepared according to the method of Example 1, except that in the step of preparing the positive electrode material of lithium-ion batteries (i.e. step 1),

[0060] (1) The cerium source Ce(NO 3 ) 3 Adding polyethylene glycol, a solvent with a weight average molecular weight of 600, and raising the temperature to 80°C to promote the dissolution of the cerium source, to obtain a cerium source solution with a molar concentration of 0.01M;

[0061] (2) Add cerium source Ce(NO 3 ) 3 The porous carbon source carbon nanotubes with a molar ratio of 1.5:1, and then ultrasonically dispersed for 60 minutes to uniformly disperse the porous carbon source in the cerium source solution to obtain the first mixture, wherein the specific surface area of ​​the carbon nanotubes is 1100m 2 / g, pore size 5nm≤r≤10nm;

[0062] (3) Elevate the temperature of the first mixture to 150°C and then vacuumize for 0.5h;

[0063] (4) Under the condition of continuous st...

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Abstract

The invention provides a lithium ion battery, and an anode material and a preparation method thereof. The anode material of the lithium ion battery is compounded by CeF3 and carbon and has a chemical formula of CeF3 / C, the carbon is porous carbon, and the CeF3 is positioned in the pores of the porous carbon. The lithium ion battery comprises an anode plate, a cathode plate, an isolating membrane and electrolyte, wherein the anode plate comprises anode materials, the isolating membrane is positioned between the anode plate and the cathode plate, and the anode material is the anode material of the lithium ion battery. The anode material of the lithium ion battery has the advantages of high initial charge capacity, high initial discharge capacity, high initial coulombic efficiency and good cycle performance. The lithium ion battery has the advantages of high energy density, good safety performance and low cost.

Description

technical field [0001] The invention relates to the technical field of batteries, in particular to a lithium-ion battery, a positive electrode material and a preparation method thereof. Background technique [0002] Among the commercialized batteries, lithium-ion batteries have the advantages of high energy density, high working voltage, long cycle life, low self-discharge rate, no memory effect, small size and light weight, and have been widely used in various portable electronic products , and become one of the first choices for power batteries and energy storage batteries. However, lithium-ion batteries still have shortcomings in terms of safety, production cost, and energy density, which restricts the further application of lithium-ion batteries in advanced electronic devices, electric vehicles, and energy storage. [0003] Generally, under conditions such as overcharge, short circuit or high temperature, heat will accumulate inside the lithium-ion battery and cause the...

Claims

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Application Information

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IPC IPC(8): H01M4/133H01M4/38H01M4/1393
CPCY02E60/10
Inventor 王福庆
Owner CONTEMPORARY AMPEREX TECH CO
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