Non-aqueous electrolyte secondary cell
View Patent ↗A non-aqueous electrolyte secondary cell having high temperature storage characteristics and cycle characteristics is provided. This object is realized by adopting the following configuration. The non-aqueous electrolyte secondary cell includes a positive electrode having a positive electrode active material; a negative electrode having a negative electrode active material; and a non-aqueous electrolyte having a non-aqueous solvent and an electrolyte salt. And the positive electrode active material contains a compound represented by Li a (Ni b Co c Mn d ) 1−x−y W x Zr y O 2 (0.9≦a≦1.2, 0.3≦b≦0.6, 0.1≦c≦0.7, 0≦d≦0.4, b+c+d=1, 0.001≦x≦0.05, 0.001≦y≦0.05); and the non-aqueous electrolyte contains at least one compound selected from the group consisting of cyclohexylbenzene, tert-butylbenzene and tert-amylbenzene in a total concentration of 0.1 to 5% by mass relative to the mass of the non-aqueous electrolyte.
1. A non-aqueous electrolyte secondary cell comprises:
a positive electrode having a positive electrode active material;
a negative electrode having a negative electrode active material; and
a non-aqueous electrolyte having a non-aqueous solvent and an electrolyte salt,
wherein
the positive electrode active material contains a compound represented by Li a (Ni b Co c Mn d ) 1 − x − y W x Zr y O 2 (0.9≦a≦1.20.3≦b≦0.6, 0.1≦c≦0.7, 0≦d≦0.4, b+c+d= 1 , 0.001≦x≦0.05, 0.001≦y≦0.05); and
the non-aqueous electrolyte contains at least one compound selected from the group consisting of cyclohexylbenzene, tert-butylbenzene and tert-amylbenzene in a total concentration of 0.1 to 5% by mass relative to the mass of the non-aqueous electrolyte.
2. A non-aqueous electrolyte secondary cell comprises:
a positive electrode having a positive electrode active material;
a negative electrode having a negative electrode active material; and
a non-aqueous electrolyte having a non-aqueous solvent and an electrolyte salt,
wherein
the positive electrode active material contains a compound represented by (Li a (Ni b Co c Mn d ) 1 − x − y − z W x Zr y M z O 2 ) (M is at least one element selected from the group consisting of Ti, Nb, Mo, Zn, Al, Sn, Mg, Ca, and Sr; 0.9≦a≦1.2, 0.3≦b≦0.6, 0.1≦c≦0.7, 0≦d≦0.4, b+c+d= 1 , 0.001≦x≦0.05, 0.001≦y≦0.05, 0.001≦z≦0.05); and
the non-aqueous electrolyte contains at least one compound selected from the group consisting of cyclohexylbenzene, tert-butylbenzene and tert-amylbenzene in a total concentration of 0.1 to 5% by mass relative to the mass of the non-aqueous electrolyte.
3. The non-aqueous electrolyte secondary cell according to claim 1 , wherein the non-aqueous electrolyte contains tert-amylbenzene.
4. The non-aqueous electrolyte secondary cell according to claim 2 , wherein the non-aqueous electrolyte contains tert-amylbenzene.
5. The non-aqueous electrolyte secondary cell according to claim 1 , wherein the non-aqueous electrolyte contains tert-butylbenzene.
6. The non-aqueous electrolyte secondary cell according to claim 2 , wherein the non-aqueous electrolyte contains tert-butylbenzene.
7. The non-aqueous electrolyte secondary cell according to claim 1 , wherein the non-aqueous electrolyte contains cyclohexylbenzene.
8. The non-aqueous electrolyte secondary cell according to claim 2 , wherein the non-aqueous electrolyte contains cyclohexylbenzene.