Negative electrode for rechargeable battery
First Claim
1. A negative electrode for a rechargeable battery, comprising:
- a current collector;
a first layer containing a conductive material to occlude and release lithium ion, the first layer formed on the current collector;
a second layer containing a metal selected from lithium and lithium alloy, the second layer formed on the first layer, and wherein the second layer is an amorphous layer; and
a third layer containing a lithium ion conductive material, the third layer formed on the second layer.
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Accused Products
Abstract
A negative electrode for a rechargeable battery including: a current collector, a first layer containing a conductive material to occlude and release lithium ion, the first layer formed on the current collector, a second layer containing a metal selected from lithium and lithium alloy, the second layer formed on the first layer, and a third layer containing a lithium ion conductive material, the third layer formed on the second layer. The third layer prevents the lithium and/or the lithium alloy in the second layer from being in contact with the electrolyte and smoothly feeds the lithium to the second layer to improve the efficiency of the negative electrode. The first layer can occlude and release the part of the lithium to be occluded and released, thereby reducing the volume change of the second layer. Such a structure of the negative electrode enables us to enhance cycling efficiency, and to attain long cycle life and good safety.
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Citations
17 Claims
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1. A negative electrode for a rechargeable battery, comprising:
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a current collector;
a first layer containing a conductive material to occlude and release lithium ion, the first layer formed on the current collector;
a second layer containing a metal selected from lithium and lithium alloy, the second layer formed on the first layer, and wherein the second layer is an amorphous layer; and
a third layer containing a lithium ion conductive material, the third layer formed on the second layer. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A negative electrode for a rechargeable battery comprising:
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a current collector;
a first layer containing a conductive polymer, the first layer formed on the current collector;
a second layer containing a metal selected from lithium and lithium alloy, the second layer formed on the first layer; and
a third layer containing a lithium ion conductive material, the third layer formed on the second layer. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16, 17)
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Specification