Negative active material for a lithium secondary battery, a method of preparing the same, and a lithium secondary battery comprising the same
A negative electrode active material, lithium secondary battery technology, applied in the direction of active material electrode, secondary battery, electrode manufacturing, etc., can solve the problem of high irreversible capacity, not meeting the needs of the battery and so on
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment approach
[0049] According to yet another embodiment of the present invention, the method for preparing the negative electrode active material of a lithium secondary battery includes: a first step of mixing a metal oxide-based core material with a carbon material precursor; The second step of forming carbon material on the surface.
[0050] Based on the core material, the amount of carbon material coated on the surface of the core material is 0.01 to 50 wt%, preferably 0.01 to 15 wt%, more preferably 1 to 15 wt%. When the amount of carbon used is less than 0.01 wt%, the efficiency deteriorates, and when the amount exceeds 50 wt%, the capacity decreases.
[0051] In addition, the thickness of the carbon layer on the surface of the core material is preferably 1 nm to 5 μm, more preferably 10 nm to 1 μm. When the thickness is lower than 1 nm, efficiency deteriorates, and when the thickness is higher than 5 μm, capacity decreases.
[0052] If at 1360cm -1 and 1580cm -1 The Raman spectru...
Embodiment 1
[0101] Li 2 CO 3 , V 2 o 3 and MoO 3 Mixed in the solid phase at a Li:V:Mo molar ratio of 1.08:0.9:0.02.
[0102] The mixture was heat-treated at 1000° C. for 10 hours under a nitrogen atmosphere, and then cooled to room temperature to obtain a metal oxide.
[0103] After finely grinding the crystalline carbon material and natural graphite, 150g of graphite and 150g of the prepared metal oxide were evenly mixed in a planetary mixer to prepare a negative electrode active material.
Embodiment 2
[0105] In addition to Li 2 CO 3 , V 2 o 3 and MoO 3 The preparation method of the negative electrode active material is the same as in Example 1 except that the molar ratio of Li:V:Mo is 1.12:0.85:0.05 and mixed in the solid phase.
PUM
| Property | Measurement | Unit |
|---|---|---|
| thickness | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More