Lithium battery anode and preparation method, lithium battery and preparation method and application

A lithium battery and positive electrode technology, applied in the lithium battery positive electrode and its preparation, lithium battery and its preparation field, can solve problems such as instability, battery safety hazards, inability to transfer lithium ions, etc., to achieve simple process, easy control of conditions, high efficiency effect

Active Publication Date: 2014-05-14
TONGDING INTERCONNECTION INFORMATION CO LTD
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  • Abstract
  • Description
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Problems solved by technology

[0004] However, the method of adding high-voltage additives has the following defects: the preferential oxidation of high-voltage additives will reduce the coulombic efficiency of the battery for several times at the beginning, and increase the irreversible capacity of the battery; Composition, the unstable characteristics of this organic compound at high temperature will not only cause the electrolyte to lose its ability to work at high voltage in a high temperature environment, but also bring hidden dangers to the safety of the battery
[0008] However, the electrode modification method still has the following technical defects: the selected material of the treatment layer is such as the hydrogen oxidation of Mg, Al, Co, K, Na, Ca, Si, Ti, Sn, V, Ge, Ga, B, As and Zr. Compounds, oxyhyd

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  • Lithium battery anode and preparation method, lithium battery and preparation method and application
  • Lithium battery anode and preparation method, lithium battery and preparation method and application
  • Lithium battery anode and preparation method, lithium battery and preparation method and application

Examples

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Example Embodiment

[0056] Correspondingly, the embodiment of the present invention also provides a method for preparing the above-mentioned lithium battery anode. For the process flow of the lithium battery anode preparation method, please refer to image 3 , See also figure 1 , 2 . The positive electrode of lithium battery includes the following steps:

[0057] Step S01. Prepare a slurry containing a material that is electrically insulated and conductive to lithium ions: mixing the material that is electrically insulated and conductive to lithium ions and a solvent to prepare a slurry;

[0058] Step S02: The slurry is covered on the positive electrode: the slurry prepared in Step S01 is covered on the positive electrode containing the positive electrode material layer 2, and the protective layer 3 is formed after drying treatment to obtain the lithium battery positive electrode.

[0059] Specifically, in the above step S01, the material that insulates electrons and conducts lithium ions is as describe...

Example Embodiment

[0080] Example 1

[0081] A lithium battery positive electrode and a preparation method thereof, and a lithium ion battery:

[0082] The microstructure of the lithium battery cathode figure 2 As shown, the positive electrode of the lithium battery includes a current collector 1, a positive electrode material layer 2 bonded on the surface of the current collector 1, and a protective layer 3 bonded on the surface of the positive electrode material layer 2 and on the pore wall of the positive electrode material layer 2. Among them, the protective layer 3 contains lithium carbonate.

[0083] The positive electrode of the lithium battery is prepared as follows:

[0084] Preparation of positive electrode: LiNi with a mass ratio of 80:10:10 0.5 Mn 1.5 O 4 , Conductive carbon, binder (polyvinylidene fluoride) and a certain amount of N-methylpyrrolidone solvent are uniformly mixed (the solid content of the final mixed solution is 45%) to obtain a positive electrode slurry, which is coated On...

Example Embodiment

[0091] Example 2

[0092] A lithium battery positive electrode and a preparation method thereof, and a lithium ion battery:

[0093] The structure of the positive electrode of the lithium battery is the same as the positive electrode of the lithium battery in Example 1, except that the protective layer contains lithium carbonate, and the concentration of the protective layer precursor solution is 10%.

[0094] The positive electrode of the lithium battery is prepared as follows:

[0095] Preparation of the positive electrode: refer to the preparation of the positive electrode in Example 1;

[0096] Prepare a slurry containing materials that are electrically insulated and conductive to lithium ions: lithium hydroxide is dissolved in water, and an aqueous solution with a mass percentage of 10% is prepared;

[0097] Positive electrode modification: The prepared positive electrode was immersed in a 10% lithium hydroxide aqueous solution, and the positive electrode sheet taken out after 30 mi...

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Abstract

The invention discloses a lithium battery anode and a preparation method, a lithium battery and a preparation method and an application. The lithium battery anode comprises a current collector, a cathode material layer combined on the surface of the current collector, and a protection layer combined on the cathode material layer surface and a cathode material layer aperture wall. The lithium battery anode can inhibit the generation of betatopic oxidation reaction of an electrolyte solvent when the high voltage is used, and the antioxidation capability of the electrolyte is increased. The lithium battery contains the lithium battery anode, and its electrochemistry performance is excellent. The preparation method of the lithium battery anode and the lithium battery has the advantages of simple technology, easy condition control and high efficiency, and is adapted to industrial production.

Description

technical field [0001] The invention belongs to the technical field of batteries, and in particular relates to a positive electrode of a lithium battery and a preparation method thereof, a lithium battery and a preparation method and application thereof. Background technique [0002] Compared with other batteries, lithium batteries have the advantages of light weight, small size, high working voltage, high energy density, high output power, high charging efficiency, no memory effect, and long cycle life. They have been widely used in mobile phones, notebook computers and other fields. Wide range of applications. However, at present, electronic digital products such as smart phones and tablet computers have higher and higher requirements on the energy density of batteries, making it difficult for commercial lithium batteries to meet the requirements. The use of high-capacity cathode materials or high-voltage cathode materials is an effective way to increase the energy densit...

Claims

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Application Information

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IPC IPC(8): H01M4/62H01M4/13H01M4/139H01M10/0525H01M10/058
CPCH01M4/13H01M4/139H01M4/62H01M10/0525H01M10/058Y02E60/10Y02P70/50
Inventor 杨同勇
Owner TONGDING INTERCONNECTION INFORMATION CO LTD
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