Negative electrode for lithium secondary battery and lithium secondary battery
AssigneeSanyo Electric Co., Ltd.
InventorsYasuyuki Kusumoto, Atsushi Fukui, Hiroshi Nakamura
Life of this patent
Estimating the term…
Abstract
A negative electrode for lithium secondary battery includes a negative electrode collector having a proportional limit of not less than 2.0 N/mm and having a negative electrode material attached thereon, and the negative electrode material including a material to be alloyed with lithium.
Claims15
A negative electrode for lithium secondary battery comprising a negative electrode material including a material to be alloyed with lithium, and a negative electrode collector having the negative electrode material attached thereon, wherein
- the negative electrode collector has a proportional limit of not less than 2.0 N/mm.
A negative electrode for lithium secondary battery comprising a negative electrode composite including a negative electrode material containing silicon, a conductive carbon material and a binder resin, and a negative electrode collector having the negative electrode composite attached to a surface thereof and sintered in a non-oxidizing atmosphere to form thereon a layer of the negative electrode composite, wherein
- the negative electrode collector has an arithmetic mean roughness Ra of not less than 0.2 μm at the surface formed with the negative electrode composite layer, wherein
- the arithmetic mean surface roughness Ra of the negative electrode collector and a thickness X (μm) of the negative electrode composite layer satisfy a condition of 250≧X/Ra, and wherein
- the negative electrode composite layer contains therein the conductive carbon material in concentrations of 0.5 to 30 wt % and the binder resin in concentrations of 5 to 40 wt %.
Dependencies are inferred from the claim text.