Power storage device
AssigneeSemiconductor Energy Laboratory Co., Ltd.
InventorsTakahiro KAWAKAMI, Masaki YAMAKAJI, Nadine TAKAHASHI
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Abstract
A power storage device includes a positive electrode including a positive electrode current collector and a positive electrode active material having an olivine structure which is represented by a structural formula LiFexMe1-xPO4 (Me=Mn, Ni, or Co) (x is greater than 0 and less than 1) over the positive electrode current collector, or a power storage device includes a positive electrode including a positive electrode current collector and a positive electrode active material, and a negative electrode which faces the positive electrode through an electrolyte, where discharging capacitance is greater than or equal to 150 mAh/g and energy density per unit weight is higher than or equal to 500 mWh/g.
Claims20
A power storage device comprising:
- a positive electrode including a positive electrode active material having an olivine structure which is represented by a structural formula LiFeMe1-xPO4 (Me=Mn, Ni, or Co) (x is greater than 0 and less than 1) and which has conductivity of greater than or equal to 1×10−9 S/cm and less than or equal to 6×10−9 S/cm.
A power storage device comprising:
- a positive electrode comprising a positive electrode current collector and a positive electrode-active material layer provided over the positive electrode current collector, the positive electrode-active material layer including a positive electrode active material having an olivine structure which is represented by a structural formula LiFeMe1-xPO4 (Me=Mn, Ni, or Co) (x is greater than 0 and less than 1) and which has conductivity of greater than or equal to 1×10−9 S/cm and less than or equal to 6×10−9 S/cm;
- and
- a negative electrode which faces the positive electrode through an electrolyte.
A power storage device comprising:
- a positive electrode comprising a positive electrode current collector and a positive electrode-active material layer provided over the positive electrode current collector, the positive electrode-active material layer including a positive electrode active material having an olivine structure which is represented by a structural formula LiFexMe1-xPO4 (Me=Mn, Ni, or Co) (x is greater than 0 and less than 1);
- and
- a negative electrode which faces the positive electrode through an electrolyte.
- wherein discharging capacitance is greater than or equal to 150 mAh/g and energy density is higher than 500 mWh/g.
A power storage device comprising:
- a positive electrode comprising a positive electrode current collector and a positive electrode-active material layer provided over the positive electrode current collector, the positive electrode-active material layer including a positive electrode active material having an olivine structure which is represented by a structural formula LiFexMe1-xPO4 (Me=Mn, Ni, or Co) (x is greater than 0 and less than 1);
- and
- a negative electrode which faces the positive electrode through an electrolyte,
- wherein discharging capacitance is greater than or equal to 150 mAh/g and energy density is higher than 550 mWh/g.
Dependencies are inferred from the claim text.