| 摘要 |
The present invention relates to a production method for an anode active material for a rechargeable lithium battery, comprising the steps of: producing a lithium-containing oxide by subjecting a mixture of Li2CO3, MnO2, MgO, Al2O3 and Co3O4 to a heat treatment at 900°C to 1,000°C in air or oxygen for between 10 and 48 hours; producing a MO (where M is one or other of Mg, Co and Ni, and the valency is 2) which constitutes a nanoparticulate metal oxide (of from 5 to 500 nm); and producing an anode active material by dry or wet mixing the crushed nanoparticulate metal oxide in a weight ratio of between 0.01 to 10 weight percent with respect to the lithium-containing oxide. According to the present invention, Li1.1Mn1.9O4 which constitutes a basic spinel is substituted by MgAl2O4 in the spinel form such that the structure is stabilised, and is substituted by Co3O4 in the spinel form such that electronic conductivity is improved and battery performance is enhanced, and the nanoparticulate metal oxide MO (where M is one or other of Mg, Co and Ni, and the valency is 2) which is introduced as an additive performs the role of a scavenger for HF (hydrogen fluoride) generated as electrolyte breakdown proceeds, thereby allowing use as an anode active material for a rechargeable lithium battery of LiMn2O4 in the spinel form, and thus the present invention provides an anode active material for a rechargeable lithium battery wherein the rechargeable lithium battery can be of reduced cost and can have increased output, increased life and increased capacity, and also provides a production method therefor. |
