Lithium metal dispersion in secondary battery anodes
First Claim
1. An anode for a secondary battery comprising a host material that is capable of absorbing and desorbing lithium in an electrochemical system and lithium metal dispersed in the host material, wherein the amount of lithium metal in said anode is no more than the maximum amount sufficient to intercalate in, alloy with, or be absorbed by the host material in said anode when the anode is recharged.
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Abstract
The present invention is a secondary battery having a high specific capacity and good cycleability, and that can be used safely. The secondary battery is manufactured to include an anode formed from a host material capable of absorbing and desorbing lithium in an electrochemical system such as a carbonaceous material, and lithium metal dispersed in the host material. The freshly prepared anodes of the invention are combined with a positive electrode including an active material, a separator that a separates the positive electrode and the negative electrode, and an electrolyte in communication with the positive electrode and the negative electrode. The present invention also includes a method of preparing a freshly prepared anode and a method of operating a secondary battery including the anode of the invention.
102 Citations
25 Claims
- 1. An anode for a secondary battery comprising a host material that is capable of absorbing and desorbing lithium in an electrochemical system and lithium metal dispersed in the host material, wherein the amount of lithium metal in said anode is no more than the maximum amount sufficient to intercalate in, alloy with, or be absorbed by the host material in said anode when the anode is recharged.
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11. A secondary battery comprising:
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a positive electrode including an active material;
a negative electrode comprising a host material that is capable of absorbing and desorbing lithium in an electrochemical system and lithium metal dispersed in the host material, wherein the amount of lithium metal in said negative electrode is no more than the maximum amount sufficient to intercalate in, alloy with, or be absorbed by the host material in said anode when said battery is recharged;
a separator for separating the positive electrode and the negative electrode; and
an electrolyte in communication with the positive electrode and the negative electrode. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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Specification