Non-Aqueous Electrolyte Battery and Method of Manufacturing the Same
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Accused Products
Abstract
Gas generation of a non-aqueous electrolyte battery having a negative active material that intercalates/deintercalates lithium ions at a potential not lower than 1.2 V relative to the potential of lithium as negative electrode is suppressed.
A non-aqueous electrolyte battery comprising a non-aqueous electrolyte containing an electrolyte salt and a non-aqueous solvent, a positive electrode and a negative electrode is characterized in that the main active material of said negative electrode is an active material that intercalates/deintercalates lithium ions at a potential not lower than 1.2 V relative to the potential of lithium and the auxiliary active material of said negative electrode is an active material that at least intercalates lithium ions at a potential lower than 1.2 V relative to the potential of lithium and that there exists lithium showing a spin-lattice relaxation time (T1) of not less than 1 second as determined by a solid-state Li—NMR measurement in the main active material of said negative electrode. A method of manufacturing a non-aqueous electrolyte battery containing a non-aqueous electrolyte, a positive electrode and a negative electrode (a main active material and an auxiliary active material of the negative electrode) is characterized in that the negative electrode potential is lowered to not higher than 0.8 V relative to the potential of lithium at least once in the initial cycle.
46 Citations
28 Claims
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1-15. -15. (canceled)
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16. A non-aqueous electrolyte battery comprising a non-aqueous electrolyte containing an electrolyte salt and a non-aqueous solvent, a positive electrode and a negative electrode, characterized in that the main active material of said negative electrode is an active material that intercalates/deintercalates lithium ions at a potential not lower than 1.2 V relative to the potential of lithium and the auxiliary active material of said negative electrode is a low temperature baked carbon material that at least intercalates lithium ions at a potential lower than 1.2 V relative to the potential of lithium and shows an interplanar spacing of the (002) plane of not less than 0.34 nm, a crystallite size Lc of not more than 100 nm as observed by wide-angle X-ray diffractometry, and a BET specific surface area of not more than 30 m2/g and that there exists lithium showing a spin-lattice relaxation time (T1) of not less than 1 second as determined by a solid-state Li—
- NMR measurement in the main active material of said negative electrode.
- View Dependent Claims (17, 18, 19, 20, 21, 22)
- 23. A method of manufacturing a non-aqueous electrolyte battery containing a non-aqueous electrolyte containing an electrolyte salt and a non-aqueous solvent, a positive electrode and a negative electrode, characterized in that an active material that intercalates/deintercalates lithium ions at a potential not lower than 1.2 V relative to the potential of lithium is used for the main active material of said negative electrode and a low-temperature baked carbon material that at least intercalates lithium ions at a potential lower than 1.2 V relative to the potential of lithium and shows an interplanar spacing of the (002) plane of not less than 0.34 nm, a crystallite size Lc of not more than 100 nm as observed by wide-angle X-ray diffractometry, and a BET specific surface area of not more than 30 m2/g is used for the auxiliary active material of said negative electrode and that the potential of the negative electrode is lowered to not higher than 0.8 V relative to the potential of lithium at least once in the initial cycle.
Specification