Lithium secondary battery anode and lithium secondary battery using the same

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...

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.

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