Lithium-ion secondary battery and method of manufacturing same
AssigneeToyota Jidosha Kabushiki Kaisha
InventorYozo Uchida
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Abstract
A lithium-ion secondary battery of this invention comprises a separator interposed between a positive electrode and a negative electrode. Moreover, a porous film of lithium titanate is formed on the surface of the negative electrode. In this lithium-ion secondary battery, when the separator is ruptured, short-circuiting of the positive electrode and negative electrode is suppressed by the lithium titanate porous film formed on the surface of the negative electrode. Further, in this configuration, a decline in the characteristics of storage of lithium ions in the negative electrode at low temperatures (low-temperature input characteristics) is suppressed.
Claims8
A lithium-ion secondary battery, comprising a positive electrode, a negative electrode, and a separator interposed between said positive electrode and said negative electrode, wherein a porous film of lithium titanate is formed on the surface of said negative electrode.
A method of manufacturing a lithium-ion secondary battery having a positive electrode, a negative electrode, and a separator interposed between said positive electrode and said negative electrode,
- the method comprising a porous film formation step of forming a porous film of lithium titanate on the surface of said negative electrode.
Dependencies are inferred from the claim text.