Silicon anode for a rechargeable battery
First Claim
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1. An electrochemical cell anode comprisinga porous composite film containing a plurality of discrete silicon or silicon-based elements as an active material, each having a first dimension in the range of 0.08 μ
- m to 0.3 μ
m and a second dimension of at least five times as large as the first dimension, the composite film having a mass of silicon or silicon-based elements between 70 and 95 percent,wherein the silicon or silicon-based elements form an interconnected array,wherein the silicon or silicon-based elements are capable of lithium insertion and removal, andwherein the silicon or silicon-based elements are selected from the group consisting of hollow tubes, ribbons and flakes.
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Abstract
An electrode and electrode assembly, for example for use as an anode in a lithium-ion rechargeable cell that uses silicon or silicon-based elements of specific dimensions and geometry as its active material, is provided, as well as methods for manufacturing the same. The active silicon or silicon-based material may include fibers, sheets, flakes, tubes or ribbons, for example.
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22 Claims
-
1. An electrochemical cell anode comprising
a porous composite film containing a plurality of discrete silicon or silicon-based elements as an active material, each having a first dimension in the range of 0.08 μ - m to 0.3 μ
m and a second dimension of at least five times as large as the first dimension, the composite film having a mass of silicon or silicon-based elements between 70 and 95 percent,wherein the silicon or silicon-based elements form an interconnected array, wherein the silicon or silicon-based elements are capable of lithium insertion and removal, and wherein the silicon or silicon-based elements are selected from the group consisting of hollow tubes, ribbons and flakes. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
- m to 0.3 μ
Specification