Battery, negative electrode active material, and electric tool
First Claim
Patent Images
1. A battery comprising:
- a positive electrode;
a negative electrode including a first negative electrode active material; and
an electrolytic solution,wherein the first negative electrode active material includes;
a core portion having a core portion surface, wherein the core portion has a median diameter of 0.3 μ
m to 20 μ
m, anda covering portion that covers at least part of the core portion surface,wherein the covering portion comprises at least Si, 0 and at least of one element M1 selected from Li, carbon (C), Mg, Al, Ca, Ti, Cr, Mn, Fe, Co, Ni, Cu, Ge, Zr, Mo, Ag, Sn, Ba, W, Ta, Na, and K, andwherein the covering portion has a gap.
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Accused Products
Abstract
A battery is provided including a positive electrode; a negative electrode including a first negative electrode active material; and an electrolytic solution, wherein the first negative electrode active material includes a core portion having a core portion surface, wherein the core portion has a median diameter of 0.3 μm to 20 μm, and a covering portion that covers at least part of the core portion surface, wherein the covering portion comprises at least Si, O and at least of one element M1 selected from Li, carbon (C), Mg, Al, Ca, Ti, Cr, Mn, Fe, Co, Ni, Cu, Ge, Zr, Mo, Ag, Sn, Ba, W, Ta, Na, and K.
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Citations
22 Claims
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1. A battery comprising:
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a positive electrode; a negative electrode including a first negative electrode active material; and an electrolytic solution, wherein the first negative electrode active material includes; a core portion having a core portion surface, wherein the core portion has a median diameter of 0.3 μ
m to 20 μ
m, anda covering portion that covers at least part of the core portion surface, wherein the covering portion comprises at least Si, 0 and at least of one element M1 selected from Li, carbon (C), Mg, Al, Ca, Ti, Cr, Mn, Fe, Co, Ni, Cu, Ge, Zr, Mo, Ag, Sn, Ba, W, Ta, Na, and K, and wherein the covering portion has a gap. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. An electric tool comprising:
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a battery including a positive electrode, a negative electrode including a negative electrode active material, and an electrolytic solution; and a moving part configured to be powered by the battery, wherein the negative electrode active material includes; a core portion having a core portion surface, wherein the core portion has a median diameter of 0.3 μ
m to 20 μ
m, anda covering portion that covers at least part of the core portion surface, wherein the covering portion comprises at least Si, O and at least of one element M1 selected from Li, carbon (C), Mg, Al, Ca, Ti, Cr, Mn, Fe, Co, Ni, Cu, Ge, Zr, Mo, Ag, Sn, Ba, W, Ta, Na, and K, and wherein the covering portion has a gap.
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14. A negative electrode active material comprising:
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a core portion having a core portion surface, wherein the core portion has a median diameter of 0.3 μ
m to 20 μ
m, anda covering portion that covers at least a part of the core portion surface, wherein the covering portion comprises at least Si and O and at least of one element M1 selected from Li, carbon (C), Mg, Al, Ca, Ti, Cr, Mn, Fe, Co, Ni, Cu, Ge, Zr, Mo, Ag, Sn, Ba, W, Ta, Na, and K, and wherein the covering portion has a gap. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22)
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Specification