Electrochemical cells, electrodes and methods of manufacture
AssigneeMoli Energy Limited
InventorsJeffery R. Dahn, David Wainwright
Life of this patent
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Abstract
An electrode precursor for lithium batteries includes a layer of an electrochemically active particulate material and a binder. The binder is soluble in the cell electrolyte so that the electrolyte extracts the binder from the particulate material after assembly, leaving a particulate layer substantially devoid of binder. Thus, the binder does not significantly decrease electrical conductivity of the layer in the cell and does not impede the ionic access to the layer. The soluble binder may be present in the electrode precursor in an amount sufficient to protect particulate which would otherwise react with the atmosphere.
Claims4
An electrochemical cell including:
- a first electrode having a convoluted substantially internally non-coherent layer of a particulate, electrochemically active material, substantially devoid of interstitial binder connecting the particles of said active material to one another, overlying a convoluted sheet-like metallic foil support;
- a counterelectrode space from said layer;
- an electrolyte in contact with said layer and said counterelectrode;
- and
- means for maintaining a compressive load on said substantially internally non-coherent layer of particulate materials;
- wherein said compressive load maintains said particulate material in a coherent layer.
Dependencies are inferred from the claim text.