Nonaqueous lithium power storage element

5:

• A positive electrode precursor used for the power storage element according to claim 1, the positive electrode precursor comprising a positive electrode power collector, and a positive electrode active material layer arranged on the positive electrode power collector,
• wherein the positive electrode active material layer contains a carbon material containing at least activated carbon, a lithium-transition metal oxide, and an alkali metal compound,
• a weight ratio A1 of the carbon material in the positive electrode active material layer is 38 wt. % to 60 wt. %,
• a weight ratio A2 of the lithium-transition metal oxide in the positive electrode active material layer is 15 wt. % to 45 wt. %,
• A1+A2 is 74 wt. % to 93 wt. %, A2/A1 is 0.30 to 1.20,
• the lithium-transition metal oxide has a specific surface area B of 7.5 m2/g to 11.0 m2/g as measured by the BET method, and
• when D10 and D90 of the lithium-transition metal oxide are defined as C1 and C2, respectively, C2/C1 is 10 to 25.

7:

• The nonaqueous lithium power storage element according to claim 1, comprising a positive electrode that comprises a positive electrode power collector and a positive electrode active material layer arranged on the positive electrode power collector;
• a negative electrode;
• a separator;
• and a lithium ion-containing nonaqueous electrolytic solution,
• wherein the positive electrode active material layer contains a carbon material containing at least activated carbon, a lithium-transition metal oxide, and an alkali metal compound,
• a weight ratio X1 of the carbon material in the positive electrode active material layer is 43 wt. % to 74 wt. %,
• a weight ratio X2 of the lithium-transition metal oxide in the positive electrode active material layer is 23 wt. % to 55 wt. %,
• X2/X1 is 0.30 to 1.20,
• X1+X2 is 92.5 wt. % to 99.3 wt. %,
• the lithium-transition metal oxide has a specific surface area Y of 7.5 m2/g to 11.0 m2/g as measured by the BET method, and
• when D10 and D90 of the lithium-transition metal oxide are defined as Z1 and Z2, respectively, Z2/Z1 is 10 to 25.

9:

• The nonaqueous lithium power storage element according to claim 1, comprising a positive electrode that comprises a positive electrode active material layer arranged on a positive electrode power collector;
• a negative electrode that comprises a negative electrode active material layer arranged on a negative electrode power collector;
• a separator;
• and an electrolytic solution, wherein the positive electrode power collector is a non-porous aluminum foil,
• the positive electrode power collector has no undercoat layer thereon, and the positive electrode active material layer is directly formed on the positive electrode power collector,
• the positive electrode active material layer contains activated carbon as a positive electrode active material,
• the positive electrode taken out by disassembling the power storage element has an interfacial resistance of 0.05 Ωcm2 to 5.00 Ωcm2 between the positive electrode active material layer and the positive electrode power collector, and
• the surface of the positive electrode taken out by disassembling the power storage element has a frequency of 1,000-μm2 to 10,000-μm2 aggregates of 0.5 aggregates/cm2 or less.

The nonaqueous lithium power storage element according to claim 9, wherein

• the positive electrode active material layer contains a lithium-transition metal oxide as a positive electrode active material, and the lithium-transition metal oxide is represented by the following formula:
• LixNiaCobAl(1-a-b)O2 {wherein, x satisfies 0≤x≤1, and a and b satisfy 0.2<a<0.97 and 0.2<b<0.97, respectively},
• LixNicCodMn(1-c-d)O2 {wherein, x satisfies 0≤x≤1, and c and d satisfy 0.2<c<0.97 and 0.2<d<0.97, respectively},
• LixCoO2 {wherein, x satisfies 0≤x≤1},
• LixMn2O4 {wherein, x satisfies 0≤x≤1},
• LixFePO4 {wherein, x satisfies 0≤x≤1},
• LixMnPO4 {wherein, x satisfies 0≤x≤1}, or
• LizV2(PO4)3{wherein, z satisfies 0≤z≤3}.

A negative electrode used for the nonaqueous lithium power storage element according to claim 1, the negative electrode comprising a negative electrode power collector;

• and a negative electrode active material layer containing a negative electrode active material, which is composed of a graphite and capable of occluding and releasing lithium ions, on one or both sides of the negative electrode power collector,
• wherein the negative electrode satisfies all of the following (1) to (4):
• (1) a material constituting the negative electrode active material layer has an average thickness of 0.2 μm to 1.0 μm;
• (2) the negative electrode active material layer has a void diameter of 0.15 μm to 0.70 μm;
• (3) the negative electrode active material layer has a specific surface area of 8 m2/g to 40 m2/g as calculated based on the weight of the negative electrode active material layer;
• and
• (4) the surface of the negative electrode has an aggregate frequency of 0 aggregates/cm2 to 1.0 aggregates/cm2.

The nonaqueous lithium power storage element according to claim 1, comprising a positive electrode;

• a negative electrode;
• and a lithium ion-containing nonaqueous electrolytic solution,
• wherein the positive electrode comprises a positive electrode power collector, and a positive electrode active material layer provided on one or both sides of the positive electrode power collector,
• the positive electrode active material layer contains a positive electrode active material and a transition metal oxide represented by MO2 {wherein, M represents at least one selected from the group consisting of Co, Ni, and Mn},
• the positive electrode active material contains a compound represented by LixMn(1-y)FeyPO4 {wherein, x satisfies 0≤x≤1, and y satisfies 0<y≤1},
• the negative electrode comprises a negative electrode power collector, and a negative electrode active material layer provided on one or both sides of the negative electrode power collector, and
• when the discharge capacity per unit area of the positive electrode is defined as A1 (mAh/cm2) and the charge capacity per unit area of the negative electrode is defined as B1 (mAh/cm2), 0.71≤A1/B1≤0.96 is satisfied.

A nonaqueous lithium power storage element precursor used for the nonaqueous lithium power storage element according to claim 1, the nonaqueous lithium power storage element precursor comprising a positive electrode precursor;

• a negative electrode precursor;
• and a lithium ion-containing nonaqueous electrolytic solution,
• wherein the positive electrode precursor comprises a positive electrode power collector, and a positive electrode active material layer provided on one or both sides of the positive electrode power collector,
• the positive electrode active material layer contains a positive electrode active material and a lithium compound composite,
• the positive electrode active material contains a compound represented by LixMn(1-y)FeyPO4 {wherein, x satisfies 0≤x≤1, and y satisfies 0<y≤1},
• the lithium compound composite is a composite of a lithium compound and a transition metal oxide represented by MO2 {wherein, M represents one selected from the group consisting of Co, Ni, and Mn},
• the negative electrode precursor comprises a negative electrode power collector, and a negative electrode active material layer provided on one or both sides of the negative electrode power collector, and
• when the charge capacity per unit area of the positive electrode precursor is defined as A2 (mAh/cm2), the discharge capacity per unit area of the positive electrode precursor is defined as A3 (mAh/cm2), and the charge capacity per unit area of the negative electrode precursor is defined as B2 (mAh/cm2), 0.65≤A3/A2≤0.93 and 1.03≤B2/A3≤1.26 are satisfied.