Electrochemical apparatus with barrier layer protected substrate
First Claim
1. A method of fabricating an electrochemical apparatus comprising:
- (a) providing a substrate of material comprising at least one of metal, metalized polymeric and silicon;
(b) depositing a first barrier layer comprising a plurality of chemically different sublayers wherein said substrate is on a first side of said first barrier layer;
(c) fabricating a first electrochemically active cell comprising a positive part and a negative part, said parts each comprising one or more terminals, wherein said first cell is located on a second side of said first barrier layer, and said first barrier layer chemically separates said first cell from said substrate; and
(d) fabricating said first barrier layer wherein a sublayer of said first barrier layer contacts another sublayer of said first barrier layer, and wherein said first barrier layer is in electrical communication with said first cell and said substrate.
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Abstract
The present invention relates to apparatus, compositions and methods of fabricating high performance thin-film batteries on metallic substrates, polymeric substrates, or doped or undoped silicon substrates by fabricating an appropriate barrier layer composed, for example, of barrier sublayers between the substrate and the battery part of the present invention thereby separating these two parts chemically during the entire battery fabrication process as well as during any operation and storage of the electrochemical apparatus during its entire lifetime. In a preferred embodiment of the present invention thin-film batteries fabricated onto a thin, flexible stainless steel foil substrate using an appropriate barrier layer that is composed of barrier sublayers have uncompromised electrochemical performance compared to thin-film batteries fabricated onto ceramic substrates when using a 700° C. post-deposition anneal process for a LiCoO2 positive cathode.
807 Citations
24 Claims
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1. A method of fabricating an electrochemical apparatus comprising:
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(a) providing a substrate of material comprising at least one of metal, metalized polymeric and silicon; (b) depositing a first barrier layer comprising a plurality of chemically different sublayers wherein said substrate is on a first side of said first barrier layer; (c) fabricating a first electrochemically active cell comprising a positive part and a negative part, said parts each comprising one or more terminals, wherein said first cell is located on a second side of said first barrier layer, and said first barrier layer chemically separates said first cell from said substrate; and (d) fabricating said first barrier layer wherein a sublayer of said first barrier layer contacts another sublayer of said first barrier layer, and wherein said first barrier layer is in electrical communication with said first cell and said substrate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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Specification