KETEP 세계에너지시장정보

A negative electrode (12) for nonaqueous electrolyte secondary battery (10) comprising a negative electrode collector (40) and a negative electrode mix layer (41) disposed on the negative electrode collector (40), wherein the negative electrode mix layer (41) includes a first layer (42) and a second layer (43) disposed successively from the negative electrode collector, the first layer (42) contains a first carbon-based active material having a 10% compressive strength of 3 MPa or less and a silicon-based active material containing Si, and the second layer (43) contains a second carbon-based active material having a 10% compressive strength of 5 MPa or more and has a lower content of the silicon-based active material than the first layer (42), characterized in that the second carbon-based active material has a porosity of 1% to 5%, (the measurement methods for both the compressive strength and the porosity are defined in the description.)