Lithium secondary battery anode and lithium secondary battery using the same

A lithium secondary battery and cathode technology, applied in the field of lithium secondary batteries, can solve the problems of loss of battery function and high cost, and achieve the effects of reducing preparation cost, prolonging service life and preventing poisoning

Inactive Publication Date: 2005-01-26
HONG FU JIN PRECISION IND (SHENZHEN) CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, controlling the relative humidity of the air to be less than 0.04% requires high cost, and it is still unavoidable to avoid a certain amount of water molecules remaining in the preparation process
In addition, after long-term use of lithium secondary batteries, water molecular gas penetration cannot be avoided, resulting in loss of battery function.

Method used

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  • Lithium secondary battery anode and lithium secondary battery using the same
  • Lithium secondary battery anode and lithium secondary battery using the same
  • Lithium secondary battery anode and lithium secondary battery using the same

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Embodiment Construction

[0013] Such as figure 1 As shown, the positive electrode 10 of the lithium secondary battery of the present invention includes a current collector 101, a positive electrode active material 102, a water absorbing agent 103 dispersed in the positive electrode active material and a binder (not shown in the figure), the positive electrode active material 102 and the water absorbing agent 1 03 is integrated by a binder and coated on the surface of the current collector 101 . The water-absorbing agent 103 includes lithiated molecular sieve, activated carbon, activated alumina, silica gel, calcium oxide, calcium sulfate, etc., has strong water absorption with a dew point lower than -56°C, and has a particle size range of 2 nanometers to 10 microns; the positive electrode active material 102 includes complex oxides of lithium and transition metals such as lithium manganese oxide, lithium nickel oxide, and lithium cobalt oxide; the current collector 101 is a metal substrate or carbon r...

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Abstract

The invention relates to a lithium secondary battery anode, including active anode material and water absorbent scattered in the active anode material. The active anode material includes Li-Mn oxide, Li-Ni oxide, Li-Co oxide, and other compound oxides of Li and transition metal; the water absorbent includes lithiated molecular sieve, activated carbon, active aluminum oxide, silica gel, calcium oxide, calcium sulfate, etc, and has strong water absorptivity with dew point lower than -56deg.C. The water absorbent can completely absorb residual water in lithium secondary battery manufacturing procedure and osmotic water due to air permeability of water molecules as use, preventing the poisoning of lithium ion battery, thus prolonging the service life of lithium secondary battery. The invention also relates to a lithium secondary battery using this anode.

Description

【Technical field】 [0001] The invention relates to a lithium secondary battery, in particular to a positive electrode of the lithium secondary battery. 【Background technique】 [0002] Lithium secondary batteries have been widely used in consumer electronic products such as mobile phones and notebook computers due to their excellent characteristics such as high energy density, high electromotive force and low self-discharge. [0003] The lithium secondary battery of the present invention includes a lithium ion battery and a polymer lithium battery. Lithium-ion batteries are secondary batteries that use carbon materials such as artificial graphite or natural graphite as negative electrodes, metal oxides such as lithium cobalt, lithium nickel, and lithium manganese as positive electrode materials, and anhydrous organic solvents as electrolytes. Polymer lithium batteries include two types, one is lithium-ion batteries whose electrodes are polymer materials, and the other is lith...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/13H01M4/36H01M4/62H01M4/64H01M10/0525
CPCY02E60/122H01M4/505H01M4/525H01M4/62H01M4/364H01M4/131Y02E60/10
Inventor 黄文正黄全德
Owner HONG FU JIN PRECISION IND (SHENZHEN) CO LTD
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