Title:
STABILIZED LITHIUM POWDER, NEGATIVE ELECTRODE USING THE SAME, AND LITHIUM ION SECONDARY BATTERY
Document Type and Number:
Japanese Patent JP2017082303
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a stabilized lithium powder that can suppress damage to a negative electrode during pre-doping and improve the initial charge/discharge efficiency.SOLUTION: Provided is a stabilized lithium powder having a coating on the surface of lithium particles and having a fan-shaped lacking part having a central angle of 5 to 150° in a portion thereof, and in which the average Feret diameter (FD) preferably is 0.1 to 106 μm.EFFECT: In said stabilized lithium powder, the stress during pressing is concentrated at the lacking part and the stabilized lithium powder can be easily crushed, and the doping can be performed with a small pressing pressure, thereby the cracking of negative electrode can be suppressed and the stabilized lithium powder is swiftly crushed to also promote uniform doping, and when making a lithium secondary battery using said negative electrode, the initial charge/discharge efficiency can be improved.SELECTED DRAWING: Figure 1
Inventors:
YAMAMOTO YUJI
AKIMOTO KAZUMA
TSUCHIYA MASAHIRO
AKIMOTO KAZUMA
TSUCHIYA MASAHIRO
Application Number:
JP2015213275A
Publication Date:
May 18, 2017
Filing Date:
October 29, 2015
Export Citation:
Assignee:
TDK CORP
International Classes:
B22F1/00; B22F1/02; H01M4/13
Domestic Patent References:
| JP2011065841A | 2011-03-31 | |||
| JP2013125697A | 2013-06-24 |
Foreign References:
| WO2014074405A1 | 2014-05-15 |