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Lithium secondary anode, its preparing method and lithium secondary anode using same

A lithium secondary battery and cathode technology, applied in the field of lithium secondary batteries, can solve problems such as initial capacity decrease, and achieve the effects of reducing decomposition, good high temperature cycle life and preventing decay

Inactive Publication Date: 2007-03-07
HONG FU JIN PRECISION IND (SHENZHEN) CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] However, at present, only a single compound is used to modify the surface of the cathode material. Although this method stabilizes the cycle performance of the cathode material, it is often accompanied by the defect of a decrease in the initial capacity.

Method used

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  • Lithium secondary anode, its preparing method and lithium secondary anode using same
  • Lithium secondary anode, its preparing method and lithium secondary anode using same
  • Lithium secondary anode, its preparing method and lithium secondary anode using same

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Embodiment Construction

[0021] The positive electrode of the lithium secondary battery provided by the embodiment of the present invention includes a substrate, and two different compounds different from the substrate material coated on different regions of the surface of the substrate; the molecular formulas of the two compounds are respectively LiMO 2 and A x o y ; Where M is one of Co, Ni, Mn, Cr transition metal elements, A is any one of Mg, Sn, Al, Si elements, and the value ranges of x and y are respectively 0<x≤2 , 0<y≤3.

[0022] In this embodiment, M is Co; A is Mg.

[0023] Wherein the substrate is one of lithium cobaltate, lithium nickelate, lithium manganate and their modified compounds, and the present embodiment adopts lithium manganate (LiMn 2 o 4 ).

[0024] The preparation method of the positive electrode of the lithium secondary battery provided by the embodiment of the present invention comprises the following steps:

[0025] Coating a compound different from the substrate ma...

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Abstract

This invention provides one lithium secondary battery anode and its process method, which comprises secondary anode composed of one base and two different compounds coating on different areas. The process method comprises the following steps: coating one compound onto anode base surface area different to basic materials; coating other compound different to basic materials on other part of the base surface to get lithium secondary battery anode of different basic material two compounds. This invention provides one lithium secondary battery composed of one anode, one cathode and one transmission isolation film.

Description

【Technical field】 [0001] The invention relates to a lithium secondary battery, in particular to a positive electrode of the lithium secondary battery, a preparation method thereof and a lithium secondary battery using the positive electrode. 【Background technique】 [0002] Lithium secondary battery refers to an electrochemical system that uses lithium ions as the conductive medium in the electrolyte and can be repeatedly charged and discharged. As electronic products tend to be thinner and smaller, and the call for environmental protection is increasing, lithium secondary batteries have become portable 3C products because of their high energy density, high output power, fast charging, light weight, small size, and no pollution. One of the best options for power supply. [0003] Generally speaking, a lithium secondary battery includes a positive electrode, a negative electrode, and a permeable separator that connects the positive electrode and the negative electrode and sepa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/02H01M4/58H01M4/48H01M4/04H01M10/38H01M10/40
CPCY02E60/122Y02E60/10Y02P70/50
Inventor 何纪壮
Owner HONG FU JIN PRECISION IND (SHENZHEN) CO LTD
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