Non-aqueous electrolyte secondary battery, and manufacturing method thereof
A lithium secondary battery 100 is configured such that an electrode body 20 , in which a cathode and an anode are stacked via a separator impregnated with an electrolyte, is housed in a battery case 10 having a substantially cylindrical square shape and that an opening 12 of the case 10 is blocked by a lid 14. Further, the lid 14 is provided with a cathode terminal 38 and an anode terminal 48, and such terminals are respectively connected, inside the battery case 10, to an internal cathode collection terminal 37 and an internal anode collection terminal 47. A non-aqueous electrolyte used for the lithium secondary battery 100 contains, as a specific compound, for example, LiBOB, and an initial content of such specific compound relative to a capacitance of the anode is 0.04 to 0.5 [(mol/kg)/(mF/cm 2 )].
1. A non-aqueous electrolyte secondary battery that is provided in a vehicle and is used as a power source for driving the vehicle, comprising;
a cathode containing a cathode active material; an anode containing an anode active material; and a non-aqueous electrolyte containing a lithium salt in a non-aqueous solvent,
wherein the non-aqueous electrolyte further contains a compound represented by formula (1) below:
[where M represents an element of the thirteenth, fourteenth or fifteenth group and another group may be bonded thereto depending on a valence; R represents C 1 -C 10 alkylene, C 1 -C 10 alkylene halide, C 6 -C 20 arylene or C 8 -C 10 arylene halide (a structure thereof may include a substituent and a hetero atom); and n represents 0 or 1], and
wherein, in the non-aqueous electrolyte, an initial content of the compound relative to a capacitance of the anode is 0.04 to 0.5 [(mol/kg)/(mF/cm 2 )].
2. The non-aqueous electrolyte secondary battery according to claim 1 , wherein the capacitance of the anode is 0.09 (mF/cm 2 ) or higher.
3. The non-aqueous electrolyte secondary battery according to claim 1 , wherein the compound represented by the formula (1) is a compound represented by formula (2) below:
4. A method of manufacturing a non-aqueous electrolyte secondary battery that is provided in a vehicle and is used as a power source for driving the vehicle, the method comprising the steps of;
forming or providing a cathode containing a cathode active material;
forming or providing an anode containing an anode active material; and
preparing a non-aqueous electrolyte containing a lithium salt in a non-aqueous solvent,
wherein, in the step of preparing a non-aqueous electrolyte, a compound represented by formula (1) below:
[where M represents an element of the thirteenth, fourteenth or fifteenth group and another group may be bonded thereto depending on a valence; R represents C 1 -C 10 alkylene, C 1 -C 10 alkylene halide, C 6 -C 20 arylene or C 8 -C 10 arylene halide (a structure thereof may include a substituent and a hetero atom); and n represents 0 or 1]
is added to the non-aqueous electrolyte such that an initial content of the compound relative to a capacitance of the anode has a value falling within a range of 0.04 to 0.5 [(mol/kg)/(mF/cm 2 )].
5. The method of manufacturing a non-aqueous electrolyte secondary battery according to claim 4 , wherein, in the step of forming or providing an anode, the capacitance of the anode is set to 0.09 (mF/cm 2 ) or higher.
6. The method of manufacturing a non-aqueous electrolyte secondary battery according to claim 4 , wherein, as the compound represented by the formula (1), a compound represented by formula (2) below is used: