NON-AQUEOUS ELECTROLYTE RECHARGEABLE BATTERY AND METHOD FOR MANUFACTURING NON-AQUEOUS ELECTROLYTE RECHARGEABLE BATTERY
A non-aqueous electrolyte rechargeable battery includes a positive electrode, a negative electrode, and a non-aqueous electrolyte. The negative electrode has a sodium concentration of greater than 532 ppm and less than 71100 ppm. The non-aqueous electrolyte rechargeable battery includes a LiBOB equivalent. The LiBOB equivalent is lithium bis(oxalato)borate in the non-aqueous electrolyte or a substance formed when the lithium bis(oxalato)borate reacts with another substance. The non-aqueous electrolyte has a hypothetical concentration of the LiBOB equivalent of 0.35 wt % or greater and 0.56 wt % or less when an amount of the LiBOB equivalent is converted into a weight of the lithium bis(oxalato)borate.
1 . A non-aqueous electrolyte rechargeable battery, comprising:
a positive electrode;
a negative electrode; and
a non-aqueous electrolyte, wherein
the negative electrode has a sodium concentration of greater than 532 ppm and less than 71100 ppm,
the non-aqueous electrolyte rechargeable battery includes a LiBOB equivalent,
the LiBOB equivalent is lithium bis(oxalato)borate in the non-aqueous electrolyte or a substance formed when the lithium bis(oxalato)borate reacts with another substance, and
the non-aqueous electrolyte has a hypothetical concentration of the LiBOB equivalent of 0.35 wt % or greater and 0.56 wt % or less when an amount of the LiBOB equivalent is converted into a weight of the lithium bis(oxalato)borate.
2 . The non-aqueous electrolyte rechargeable battery according to claim 1 , wherein
the negative electrode includes a negative electrode current collector and a negative electrode active material layer, and
the negative electrode active material layer has a density of 1.14 grams per cubic centimeter or greater.
3 . The non-aqueous electrolyte rechargeable battery according to claim 1 , wherein the non-aqueous electrolyte has a viscosity of 3.9 cP or less.
4 . The non-aqueous electrolyte rechargeable battery according to claim 1 , wherein the negative electrode has a sodium concentration of 700 ppm or greater.
5 . The non-aqueous electrolyte rechargeable battery according to claim 1 , wherein
the positive electrode and the negative electrode are rolled with a separator held between the positive electrode and the negative electrode into a rolled electrode body, and
the negative electrode in the rolled electrode body has a resistance that increases from an end to a central portion in a direction parallel to a rolling axis.
6 . A method for manufacturing a non-aqueous electrolyte rechargeable battery including a positive electrode, a negative electrode, and a non-aqueous electrolyte, the method comprising:
obtaining the negative electrode having a sodium concentration that is greater than 532 ppm and less than 71100 ppm;
accommodating an electrode body including the positive electrode and the negative electrode in a battery case; and
injecting the non-aqueous electrolyte into the battery case, wherein
the injected non-aqueous electrolyte includes a LiBOB equivalent,
the LiBOB equivalent is lithium bis(oxalato)borate or a substance formed by a reaction of the lithium bis(oxalato)borate with another substance, and
the injected non-aqueous electrolyte has a concentration of the LiBOB equivalent of 0.35 wt % or greater and 0.56 wt % or less when an amount of the LiBOB equivalent is converted into a weight of the lithium bis(oxalato)borate.
7 . The method according to claim 6 , wherein
the negative electrode includes a negative electrode current collector and a negative electrode active material layer, and
the negative electrode active material layer has a density of 1.14 grams per cubic centimeter or greater.
8 . The method according to claim 6 , wherein the non-aqueous electrolyte has a viscosity of 3.9 cP or less.
9 . The method according to claim 6 , wherein the negative electrode has a sodium concentration of 700 ppm or greater.