Lithium ion battery cathode material and non-aqueous electrolyte batterie

A lithium-ion battery, non-aqueous electrolyte technology, applied in non-aqueous electrolyte batteries, non-aqueous electrolyte battery electrodes, electrolyte battery manufacturing and other directions, can solve the problems of limited application, low theoretical capacity, etc., to achieve low charge-discharge expansion rate, theoretical The effect of high specific capacity and improved electrochemical performance

Inactive Publication Date: 2019-01-18
AAC TECH NANJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The material has a safe working potential, good cycle performance, and meets the requirements of safe, stable, and fast charging and discharging after modification, but its inherent low theoretical capacity (only 175mAh g -1 ) limits its application in high-performance Li-ion batteries

Method used

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  • Lithium ion battery cathode material and non-aqueous electrolyte batterie
  • Lithium ion battery cathode material and non-aqueous electrolyte batterie
  • Lithium ion battery cathode material and non-aqueous electrolyte batterie

Examples

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Effect test

Embodiment 1

[0083] This embodiment provides a method for preparing MoNb by solid phase method 12 o 33 The method for electrode material, it comprises the following steps:

[0084] MoNb can be obtained by mixing molybdenum trioxide and niobium pentoxide according to the molar ratio of 1:12 by high-energy ball mill and sintering at 900°C for 12 hours. 12 o 33 powder, such as image 3 As shown, the MoNb prepared in this example 12 o 33 The material is a pure phase material with sheared ReO 3 structure.

Embodiment 2

[0086] This embodiment provides a method for preparing W by solid-phase method 4 Nb 26 o 77 The method for electrode material, it comprises the following steps:

[0087] After mixing tungsten trioxide and niobium pentoxide according to the molar ratio of 4:26 by high-energy ball mill, sintering at 1100°C for 5 hours, you can get W 4 Nb 26 o 77 powder, such as Figure 4 As shown, the W prepared in this example 4 Nb 26 o 77 The material is a pure phase material with sheared ReO 3 structure.

Embodiment 3

[0089] This embodiment provides a method for preparing WNb by solid phase method 12 o 33 The method for electrode material, it comprises the following steps:

[0090] WNb can be obtained by mixing tungsten trioxide and niobium pentoxide according to the molar ratio of 1:12 by high-energy ball mill and sintering at 800°C for 12 hours. 12 o 33 powder, such as Figure 5 As shown, the WNb prepared in this example 12 o 33 The material is a pure phase material with sheared ReO 3 structure.

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Abstract

The invention relates to the technical field of lithium ion batteries and discloses a lithium ion battery negative electrode material and a non-aqueous electrolyte battery. In the present invention, the general formula of the negative electrode material of the lithium ion battery is MxNbyOz, wherein M represents a positive pentavalent and / or positive hexavalent non-niobium metal ion, and 1 (x <= 16, 2 <= y <= 28, 13 <= z <= 94. The active material MxNbyOz has a shear ReO3 structure or a tungsten bronze structure, and is used as the cathode material of the non-aqueous electrolyte battery, has the advantage of high theoretical specific capacity, high safety performance, high reversible specific capacity, high coulomb efficiency and excellent cycle performance.

Description

technical field [0001] The invention belongs to the technical field of lithium ion batteries, and in particular relates to a lithium ion battery negative electrode material and a nonaqueous electrolyte battery. Background technique [0002] Due to the advantages of low cost and high stability, Li-ion batteries are recognized as a very promising energy source for electric vehicles. Especially with the rapid development of new energy vehicles in recent years, the research and development of power batteries has become the key to the rapid development of new energy, and electrode materials are the key factors affecting power batteries. At present, commercial lithium-ion batteries mostly use graphite as the negative electrode material and liquid organic solution as the electrolyte. Graphite has a high theoretical capacity (372mAh g -1 ), long cycle life, low cost, etc. However, due to its low working potential, there is a danger of battery short circuit when charging and discha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/48H01M10/0525
CPCH01M4/483H01M10/0525H01M4/0404H01M4/13H01M4/131H01M4/139H01M4/1391H01M4/485H01M4/625H01M10/058H01M2004/027Y02E60/10
Inventor 张健楼晓鸣赵前进陈少海
Owner AAC TECH NANJING
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