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A kind of polyoxometalate carbon nanotube lithium ion battery electrode material and preparation method thereof

A technology of polyoxometalate and lithium polyoxometalate, which is applied in battery electrodes, nanotechnology, secondary batteries, etc., can solve problems such as high-rate discharge of batteries, improve transmission characteristics, and improve lithium ion transmission characteristics Effect

Active Publication Date: 2016-06-01
DONGFANG ELECTRIC CORP LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the factors that determine the internal resistance of the battery include electronic conductivity and ionic conductivity. From the description of the patent, the electrode material prepared by this method only improves the electronic conductivity, but does not start from the ionic conductivity. Although it can be used in To a certain extent, the discharge specific capacity is improved, but it may not be able to ensure that the battery has the ability to discharge at a large rate

Method used

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  • A kind of polyoxometalate carbon nanotube lithium ion battery electrode material and preparation method thereof
  • A kind of polyoxometalate carbon nanotube lithium ion battery electrode material and preparation method thereof

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Embodiment 1

[0028] A polyoxometalate carbon nanotube electrode material for lithium-ion batteries: the electrode material comprises lithium phosphomolybdate Li 3 PMo 12 o 40 with solid carbon nanotubes.

[0029] Its preparation method is:

[0030] (1) Weigh phosphomolybdic acid H at a mass ratio of 1:9 3 PMo 12 o 40 and solid carbon nanotubes, and respectively configure the same volume of aqueous solution;

[0031] (2) Phosphomolybdic acid H 3 PMo 12 o 40 The solution was slowly added dropwise into the carbon nanotube solution, and reacted at room temperature for 10 hours;

[0032] (3) Then add lithium hydroxide solution (LiOH) (lithium hydroxide and H 3 PMo 12 o 40 The molar ratio is 3:1) to react for 6 hours to obtain a solid precipitate;

[0033] (4) Wash the obtained solid with distilled water and alcohol repeatedly until the filtrate is colorless (or clear), and dry the solid in a vacuum oven at 85°C for 8-12 hours to obtain the electrode material Li 3 PMo 12 o 40 - C...

Embodiment 2

[0051] Compared with embodiment 1, polyoxometallic acid is changed into phosphotungstic acid H 3 PW 12 o 40 , the mass ratio of phosphotungstic acid to carbon nanotubes was changed to 1:6, and the electrode material Li 3 PW 12 o 40 -The preparation method of CNT is the same as embodiment 1. Battery production step is with embodiment 1, wherein: lithium iron phosphate 55%, LiFePO4 3 PW 12 o 40 -CNT content is 40%, binder PVDF 5%.

Embodiment 3

[0053] Compared with embodiment 1, polyoxometallic acid is changed into phosphomolybdic acid H 4 SiMo 12 o 40 , the mass ratio of phosphomolybdic acid to carbon nanotubes was changed to 1:4, and the electrode material Li 4 SiMo 12 o 40 -The preparation method of CNT is the same as embodiment 1. Battery manufacturing step is the same as embodiment 1, wherein: lithium iron phosphate 70%, LiFePO4 4 SiMo 12 o 40 -CNT content is 25%, binder PVDF 5%.

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Abstract

The invention discloses an electrode material for a polyoxometallate carbon nanotube lithium ion battery. The electrode material is synthesized through oxidation of lithium polyoxometallate and functionalization of a carbon nanotube. The lithium polyoxometalate Li3XY12O40 has a three-dimensional skeleton structure, and lithium ions can be conducted in a three-dimensional skeleton; after oxidation and functionalization, the polyoxometalate is adsorbed on the wall of the carbon nanotube; and thus, the lithium ion transport characteristic is improved through the polyoxometalate, the electron transport characteristic is improved through the carbon nanotube, and double requirements of the electrode material on lithium ion transport and electron transport are met.

Description

technical field [0001] The invention relates to an electrode material for a lithium ion battery, in particular to an electrode material for a polyoxometalate carbon nanotube lithium ion battery and a preparation method thereof. Background technique [0002] With the serious shortage of global oil resources and the increasing environmental pollution, the demand for large-scale clean energy is increasing. However, clean energy such as solar energy and wind energy is unevenly distributed in time and space, and large-scale energy storage systems must be used To ensure the stability of the grid and the continuity of power supply. Lithium battery, as an effective energy conversion and energy storage device, has attracted much attention since its invention. Its characteristics of high working voltage, high energy density, high specific energy, high specific power, stable discharge, and no memory effect are widely used in Various electronic products. Although lithium batteries hav...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/58H01M4/62B82Y30/00
CPCB82Y30/00H01M4/5825H01M4/625H01M10/0525Y02E60/10
Inventor 廖小东王瑨谢皎蒋正伟
Owner DONGFANG ELECTRIC CORP LTD
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