Active material, non-aqueous electrolyte battery, battery pack and vehicle
A technology of active materials and composite oxides, applied in the direction of non-aqueous electrolyte batteries, non-aqueous electrolytes, active material electrodes, etc., can solve problems such as difficulty in reducing electrode potential
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no. 1 Embodiment approach
[0042] According to the first embodiment, there is provided an active material including a composite oxide having an orthorhombic crystal structure whose space group is Fmmm. The composite oxide is an active material with the following characteristics: it uses the general formula Li 2+x Na 2- y m z Ti 6 o 14+δ indicates that M contains at least one of Mg, Ca, Sr, and Ba. x is in the range of 0≤x≤6. y is in the range of 0z.
[0043]Regarding the preferred form of the complex oxide contained in the active material according to the first embodiment, it can be equivalent to using the general formula Li 2+x Na 2 Ti 6 o 14 The space group of the composite oxide shown is a replacement composite oxide in which a part of the Na site is replaced by a cation M in the crystal structure of Fmmm and / or Na ions are detached from a part of the Na site to form a hole (void site).
[0044] When the amount of Na in the crystal structure of the composite oxide changes, the potential be...
no. 2 Embodiment approach
[0127] According to the second embodiment, there is provided a nonaqueous electrolyte battery. This nonaqueous electrolyte battery includes a negative electrode containing the active material according to the first embodiment as a battery active material, a positive electrode, and a nonaqueous electrolyte.
[0128] The non-aqueous electrolyte battery according to the second embodiment may further include a separator arranged between the positive electrode and the negative electrode. The negative electrode, the positive electrode and the separator can constitute an electrode group. A non-aqueous electrolyte may be held in the electrode group.
[0129] In addition, the nonaqueous electrolyte battery according to the second embodiment may further include an outer package member for accommodating the electrode group and the nonaqueous electrolyte.
[0130] In addition, the non-aqueous electrolyte battery according to the second embodiment may further include a negative terminal ...
no. 3 Embodiment approach
[0197] According to a third embodiment, a battery pack is provided. This battery pack includes the nonaqueous electrolyte battery according to the second embodiment.
[0198] The battery pack according to the third embodiment may include one or more of the non-aqueous electrolyte batteries (single cells) according to the second embodiment described above. The plurality of non-aqueous electrolyte batteries that can be included in the battery pack according to the third embodiment can be electrically connected in series, in parallel, or in combination. A plurality of non-aqueous electrolyte batteries can also be electrically connected to form a battery pack. The battery pack according to the third embodiment may include a plurality of assembled batteries.
[0199] The battery pack according to the third embodiment may further include a protection circuit. The protection circuit controls charge and discharge of the nonaqueous electrolyte battery. Alternatively, a circuit incl...
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Abstract
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