NEGATIVE ACTIVE MATERIAL FOR SECONDARY BATTERY, AND ELECTRODE AND SECONDARY BATTERY INCLUDING THE SAME
摘要
A negative active material for a secondary battery according to the present invention includes a core carbon material and a carbide layer formed on at least a portion of an edge of the core carbon material, and has a difference (an amount of compression density change) of 0.5g/cc or more between a first compression density measured when a pressure of 63.704 MPa is applied for 2 seconds and a second compression density measured when a pressure of 6.3704 MPa is applied for 2 seconds. A secondary battery manufactured using the negative active material according to the present invention can prevent deterioration of characteristics caused by destruction of the carbide layer during a compression process in the manufacture of an electrode of a secondary battery. As a result, a cycle efficiency and a discharging capacity retention rate at a long cycle can be improved.
申请公布号
WO2009125909(A1)
申请公布日期
2009.10.15
申请号
WO2008KR07549
申请日期
2008.12.19
申请人
LS MTRON LTD.;YOUM, CHUL;OH, JEONG-HUN;KIM, JONG-SUNG;HAN, KYUNG-HEE;HAN, JEONG-MIN