Electrode material of secondary lithium ion battery, and its preparation method

A lithium-ion battery and electrode material technology, applied in the fields of electrochemistry, material chemistry and chemical power products, can solve the problems of low specific capacity, insufficient safety performance, and the inability to popularize electric vehicles and hybrid vehicles, and achieve high specific capacity, Excellent cycle performance, the effect of small voltage relaxation

Active Publication Date: 2013-03-20
HUBEI HONGRUN HIGH-TECH NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the defects of the prior art, the object of the present invention is to provide an electrode material for a secondary lithium-ion battery, aiming to solve the problem that the ...

Method used

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  • Electrode material of secondary lithium ion battery, and its preparation method
  • Electrode material of secondary lithium ion battery, and its preparation method
  • Electrode material of secondary lithium ion battery, and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Example 1, after mixing niobium pentoxide and titanium dioxide according to the ratio of element molar ratio Ti:Nb=1:24 by ball milling, sintering at 800°C for 1 hour, TiNb can be obtained 24 o 62 powder.

Embodiment 2

[0039] Example 2, after mixing niobium pentoxide and titanium dioxide according to the ratio of element molar ratio Ti:Nb=1:5, they are mixed by ball milling method, and then sintered at 1100°C for 24h to obtain Ti 2 Nb 10 o 29 powder.

Embodiment 3

[0040] Example 3, after mixing niobium oxalate and titanium dioxide according to the ratio of element molar ratio Ti:Nb=1:1, they are mixed by ball milling method, and then sintered at 1400°C for 24h to obtain Ti 2 Nb 2 o 9 powder.

[0041] In order to save space, Table 1 shows the specific parameters of the 4th embodiment to the 12th embodiment by solid-phase method mixing:

[0042]

[0043] Table I

[0044] (2) Mix and obtain electrode material Ti by sol-gel method x Nb y o z Examples of powders are as follows:

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Abstract

The invention discloses an electrode material of a secondary lithium ion battery, and its preparation method. The chemical formula of the electrode material is TixNbyOz, wherein the value of x:y is not less than 1:24 and not more than 1:1. The preparation method comprises the following steps: mixing a titanium source containing x mol of a titanium element with a niobium source containing y mol of a niobium element to obtain a mixture, and sintering the mixture to obtain the powder of the electrode material TixNbyOz. The electrode material provided in the embodiment of the invention has a theoretic specific capacity as a cathode material of the lithium ion battery, and there is no formation of an SEI film in the working voltage rang of the cathode material of 3-1V; and the electrode material has the advantages of high reversible specific capacity, small voltage relaxation, high coulombic efficiency, excellent cycle performances, and good safety.

Description

technical field [0001] The invention belongs to the technical fields of electrochemistry, material chemistry and chemical power supply products, and more specifically relates to an electrode material of a secondary lithium ion battery and a preparation method thereof. Background technique [0002] In recent years, the lack of energy and the aggravation of environmental pollution have prompted people to look for vehicles powered by new energy sources. Electric vehicles (Electric Vehicle, EV) and hybrid vehicles (Hybrid Electric Vehicle, HEV) are in line with the requirements of new energy vehicles. development requirements. Lithium-ion batteries are considered to be the best power source for driving electric vehicles and hybrid vehicles because of their high energy density, long service life, no self-discharge effect, and environmental friendliness. [0003] Safety issues are the key factors hindering the widespread application of lithium-ion batteries in power electric vehi...

Claims

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Application Information

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IPC IPC(8): H01M4/48
CPCY02E60/12Y02E60/10
Inventor 黄云辉伽龙袁利霞
Owner HUBEI HONGRUN HIGH-TECH NEW MATERIALS CO LTD
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