Transformation type transitional metal oxide negative electrode material and preparation method therefor

A transition metal and negative electrode material technology, which is applied in the field of transformation-type transition metal oxide negative electrode materials and their preparation, can solve the problems of material pulverization, large volume expansion of transition metal oxide electrode materials, poor rate performance and cycle stability, etc. Achieve the effect of low cost, improved rate performance and cycle stability, and excellent performance

Inactive Publication Date: 2017-07-04
FUJIAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, during the charge-discharge cycle, the volume of transition metal oxide electrode materials will expand greatly, and even cause material pulverization, resulting in poor rate performance and cycle stability.

Method used

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  • Transformation type transitional metal oxide negative electrode material and preparation method therefor
  • Transformation type transitional metal oxide negative electrode material and preparation method therefor
  • Transformation type transitional metal oxide negative electrode material and preparation method therefor

Examples

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Embodiment 1

[0020] Assembly of lithium ion battery:

[0021] 1) First mix 6 g of gum arabic with 100 ml of deionized water, and obtain a homogeneous solution (concentration of 60 mg·ml -1 ); 2) Then Fe 2 o 3 : Acetylene black: Gum Arabic = 78:10:12 Mix and grind and apply evenly on 1.2 cm 2 The copper sheet is used as the working electrode, the counter electrode is lithium metal, and the electrolyte is 1 M LiPF 6 EC+DEC+DMC (EC / DEC / DMC=1 / 1 / 1 v / v / v) solution; cell assembly was carried out in a glove box under argon protection (both oxygen and moisture content were below 1ppm).

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Abstract

The invention belongs to the preparation field of an electrode material of a battery, and specifically relates to a transformation type transitional metal oxide negative electrode material and a preparation method therefor. The negative electrode material comprises a current collector and a transformation type transitional metal oxide thin film material which is coated on the current collector; the thin film material takes an arabic gum water solution as an electrode thin film binder to replace conventional polyvinylidene fluoride; and by virtue of the flexibility of the arabic gum, the problem of volume change of the transitional metal oxide electrode material is relieved, so that the rate capability and the cycling stability of the transitional metal oxide electrode material are improved to a large extent.

Description

technical field [0001] The invention belongs to the field of battery electrode material preparation, and in particular relates to a conversion type transition metal oxide negative electrode material and a preparation method thereof. Background technique [0002] Lithium-ion batteries are widely used in mobile electronic devices, defense industry, electric vehicles and other fields due to their remarkable advantages such as high capacity, high voltage and long cycle life. At present, the negative electrode of lithium-ion batteries is mainly carbon-based negative electrode materials, mainly graphite negative electrode materials, but the theoretical specific capacity of graphite negative electrode materials is 372mAh / g, and the lower capacity limits the further improvement of battery energy density. Transition metal oxides such as FeO, CoO, NiO, Cu 2 O, etc., are considered to be a very promising anode material for lithium-ion batteries due to their high capacity. Transition ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/525H01M4/62H01M10/0525
CPCH01M4/364H01M4/525H01M4/622H01M10/0525Y02E60/10
Inventor 洪振生周凯强何晓晴
Owner FUJIAN NORMAL UNIV
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