Lithium ion battery cathode material with function of rapid charging and preparation method thereof

A technology for lithium-ion batteries and negative electrode materials, applied in battery electrodes, circuits, electrical components, etc., can solve the problems of low conductivity of lithium metal oxides, and achieve the effect of increasing conductivity and fast charging

Active Publication Date: 2012-02-08
IND TECH RES INST
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  • Summary
  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

Although this kind of anode material with an extra shell can discharge quickly, lithium metal oxide has the problem of low conductivity.

Method used

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  • Lithium ion battery cathode material with function of rapid charging and preparation method thereof
  • Lithium ion battery cathode material with function of rapid charging and preparation method thereof
  • Lithium ion battery cathode material with function of rapid charging and preparation method thereof

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preparation example Construction

[0050] The preparation method of the above-mentioned lithium ion battery negative electrode material 100 includes using a carbon material (such as natural graphite, artificial graphite, carbon black, carbon nanotubes or carbon fibers) to make a core, because there are several organic functional groups on the surface of the carbon core, such as carbonyl (Carbonyl groups, C=O), carboxyl groups (Carboxyl groups, C-OOH), hydroxyl groups (Hydroxyl group, -OH), so the lithium / titanium precursor and the carbon core surface can be chemically bonded to make the precursor on the carbon Sol-gel reaction is carried out on the surface of the core, so that the lithium / titanium precursor (or lithium / manganese precursor) is chemically bonded to the surface of the carbon core, and the conditions of the calcination step are further controlled to form a composite lithium metal oxide / carbon Composite material (Li 4 m 5 o 12 -MO x / C). The aforementioned lithium / titanium precursors are, for ex...

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Abstract

The invention discloses a lithium ion battery cathode material with a function of rapid charging and a preparation method thereof. The lithium ion battery cathode material with a function of rapid charging comprises a carbon core and a modified layer. The modified layer is formed on the surface of the carbon core by a sol-gel method, wherein the modified layer comprises a compound lithium metal oxide having a chemical general formula of Li4M5O12-MOx; M represents titanium or manganese; and x is great than or equal to 1 and is less than or equal to 2. In the invention, the modified layer comprising the compound lithium metal oxide having a chemical general formula of Li4M5O12-MOx is formed on the surface of the carbon core by the sol-gel method. A lithium metal oxide does not produce a solid electrolyte interface film in charging and discharging, does not produce strain and has a three-dimensional crystal structure. Therefore, the lithium ion battery cathode material with a function of rapid charging is beneficial for reduction of a common solid electrolyte interface (SEI) film on the surface of a carbon material, and enables lithium ions to pass through the compound lithium metal oxide to enter rapidly into the carbon material and thus realizing rapid charging.

Description

technical field [0001] The invention relates to a lithium ion battery negative electrode material, in particular to a rapidly chargeable lithium ion battery negative electrode material. Background technique [0002] Lithium-ion batteries have been widely used in notebook computers, mobile phones, digital cameras, video cameras, PDAs, Bluetooth headsets and wireless 3C products, but the applications of electric vehicles and hand tools that require high power are not yet mature. Electric vehicles (EV) are known as one of the most important industrial products in this century, and lithium-ion batteries will be the primary choice of energy for electric vehicles. As far as this application is concerned, the need for fast charging is the primary challenge and Problems that need to be solved urgently. [0003] At present, graphite (or Mesocarbon micro beads, MCMB) is commonly used in lithium-ion battery anode materials, which have high conductivity, stable capacitance and discharg...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/133H01M4/1393
CPCY02E60/10
Inventor 陈金铭张彦博廖世杰彭裕民郑季汝李孟伦
Owner IND TECH RES INST
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