Anode material for secondary battery and secondary batteries using the same
A secondary battery and anode material technology, applied in secondary batteries, secondary battery manufacturing, battery electrodes, etc., can solve problems such as increased potential changes, battery stability damage, and electrode material damage
Inactive Publication Date: 2007-07-18
LG CABLE LTD (KR) +1
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- Description
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- Application Information
AI Technical Summary
Problems solved by technology
However, lithium-ion secondary batteries have the disadvantage of causing internal short circuits due to the formation of dendrites during the process of depositing lithium ions on the surface of metallic lithium during charging
However, lithium alloys have a disadvantage that stable electrical properties cannot be ensured if the alloy is used for a long period of time due to alloy segregation when charge / discharge cycles are repeated for a long period of time
If the carbon-based material is used as an anode material, the carbon-based material has the advantage that the electrolyte is not dissolved due to its low reactivity with the electrolyte. However, the carbon-based material has the disadvantage that, due to lithium Emission of ions causes their potential change to increase
In addition, the advantage of the graphite-based material is that the potential change due to the emission of lithium ions is small, but the disadvantage of the graphite-based material is that it reacts with the electrolyte to decompose the electrolyte, which will further damage the electrode material.
As a result, deterioration of charge / discharge efficiency and cycle characteristics of the battery and damage to the stability of the battery are caused
Method used
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Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1 and 2 and comparative example 1 and 2
[0015] As shown in Table 1 below, the carbonaceous materials in Examples 1 and 2 and Comparative Examples 1 and 2 were used as anode materials, respectively. And, the weight ratio of carbonaceous material dissolved in tetrahydrofuran (THF) to pitch was determined as listed in Table 1 below. Electrodes were fabricated using the carbon mixture materials listed in Table 1 below in accordance with the method described later.
[0016] Table 1
[0017] Example
comparative example
1
2
1
2
carbonaceous material
type
Spherical graphite base
carbonaceous material
Spherical graphite base
carbonaceous material
Natural graphite based
carbonaceous material
less spherical
natural graphitic carbon
Carbonaceous materials:
Bitumen (weight
Compare)
9∶1
9.5∶0.5
10∶0
10∶0
[0018] The mixed materials listed in Table 1 were uniformly mixed by wet stirring fo...
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Abstract
Disclosed are an anode material for a secondary battery and a secondary battery using the same. The present invention provides the anode material for a secondary battery, produced by coating a high-crystallinity core carbonaceous material with a coating carbonaceous material and calcining the high-crystallinity core carbonaceous material, wherein the anode material for a secondary battery has a delamination area of 0.1x10<-5 >to 1.0x10<-4 >or a volume fraction of water uptake of 0.01 or less. The secondary battery according to the present invention may be useful to improve a charging / discharging capacity and a charging / discharging efficiency of the battery and ensure a stability of the battery since the battery has an improved protection against a degradation reaction of an electrolyte if the battery is produced using the anode material for a secondary battery.
Description
technical field [0001] The present invention relates to an anode material for a secondary battery and a secondary battery using the anode material, more particularly to a method of coating a high-crystallinity carbon-containing core material with a carbon-containing coating material and calcining the high An anode material for a secondary battery manufactured from a carbon-containing core material of crystallinity and a secondary battery using the anode material, wherein the anode material for a secondary battery can be used to manufacture the delamination area (delamination area) Or a secondary battery in which the volume ratio of water uptake improves discharge capacity and charge / discharge efficiency. Background technique [0002] Recently, demand for small and lightweight secondary batteries with relatively high capacity is increasing, and the wide application of electronic devices using batteries such as mobile phones, mobile notebook computers, electric vehicles, etc. ...
Claims
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Patent Timeline
Login to View More IPC IPC(8): H01M4/02H01M4/58H01M10/04H01M10/40H01M4/587
CPCY02T10/7011Y02E60/122Y02E60/10Y02P70/50
Inventor 金浩建金宗成申东宪廉哲吴政勳
Owner LG CABLE LTD (KR)