Positive electrode for lithium ion secondary battery and lithium ion secondary battery including the same
First Claim
1. A positive electrode for a lithium ion secondary battery, the positive electrode comprising:
- a coated particle comprising a positive active material particle and a reactive layer on a surface of the positive active material particle; and
a sulfide-containing solid electrolyte particle which is in contact with the coated particle,wherein the reactive layer consists of a reactive element other than lithium and oxygen, wherein the reactive element has a reactivity with the sulfide-containing solid electrolyte particle which is greater than a reactivity of the reactive element with a transition metal element included in the positive active material particle, andwherein a ratio of a thickness of the reactive layer to a particle diameter of the positive active material particle is in a range of about 0.0010 to about 0.25.
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Abstract
A positive electrode for a lithium ion secondary battery, the positive electrode including: a coated particle including a positive active material particle and a reactive layer on the surface of the positive active material particle; and a sulfide-containing solid electrolyte particle which is in contact with the coated particle, wherein the reactive layer includes a reactive element other than lithium and oxygen, wherein the reactive element has a reactivity with the sulfide-containing solid electrolyte particle which is greater than with a reactivity of the reactive element with a transition metal element included in the positive active material particle, and wherein a ratio of a thickness of the reactive layer to a particle diameter of the positive active material particle is in a range of about 0.0010 to about 0.25.
7 Citations
15 Claims
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1. A positive electrode for a lithium ion secondary battery, the positive electrode comprising:
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a coated particle comprising a positive active material particle and a reactive layer on a surface of the positive active material particle; and a sulfide-containing solid electrolyte particle which is in contact with the coated particle, wherein the reactive layer consists of a reactive element other than lithium and oxygen, wherein the reactive element has a reactivity with the sulfide-containing solid electrolyte particle which is greater than a reactivity of the reactive element with a transition metal element included in the positive active material particle, and wherein a ratio of a thickness of the reactive layer to a particle diameter of the positive active material particle is in a range of about 0.0010 to about 0.25. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A process of making a positive electrode for a lithium ion secondary battery, the process comprising:
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providing a sulfide-containing solid electrolyte particle; providing a positive active material particle containing a transition metal; coating the positive active material particle with a reactive layer consisting of a reactive element other than lithium and oxygen, wherein the reactive element has a reactivity with the sulfide-containing solid electrolyte particle which is greater than a reactivity of the reactive element with a transition metal element included in the positive active material particle; and contacting the sulfide-containing solid electrolyte particle with the coated particle, wherein a ratio of a thickness of the reactive layer to a particle diameter of the positive active material particle is in a range of about 0.0010 to about 0.25 to make the positive electrode. - View Dependent Claims (13)
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- 14. A process of making a lithium ion secondary battery having a positive electrode and a negative electrode, the process comprising disposing a solid electrolyte layer comprising a sulfide-containing solid electrolyte particle coated with a reactive layer between the positive electrode and the negative electrode.
Specification