Active material for battery, non-aqueous electrolyte battery and battery pack

摘要

According to one embodiment, an active material for a battery includes a titanium composite oxide. The titanium composite oxide contains a monoclinic β-type titanium composite oxide as its main phase and has a ratio (A2/A1) which is 0.4 or less, where A1 is an area intensity of a first peak existing in a frequency range of 105 cm−1 to 133 cm−1 and A2 is an area intensity of a second peak existing in a frequency range of 134 cm−1 to 154 cm−1 on a Raman spectrum measured using an argon laser having a wavelength of 514.5 nm.

主权项

1. A negative electrode active material for a battery, comprising a titanium system oxide selected from a titanium oxide and a titanium composite oxide, wherein the titanium system oxide contains a monoclinic β-type titanium composite oxide as its main phase and has a ratio (A2/A1) which is 0.4 or less, where A1 is an area intensity of a first peak existing in a frequency range of 105 cm−1 to 133 cm−1 and A2 is an area intensity of a second peak existing in a frequency range of 134 cm−1 to 154 cm−1 on a Raman spectrum measured using an argon laser having a wavelength of 514.5 nm,
wherein at least one element selected from P and B is further added to the titanium system oxide, an amount of the at least one element is 0.01% by weight or more and 3% by weight or less based on a total amount of the titanium system oxide and the at least one element.