Electrical storage device and electrode thereof

摘要

The present invention generally relates to electrodes, electrical storage devices comprising the electrodes, and methods for producing the electrodes and electrical storage devices. The electrodes comprise a current collector, an electrically conductive mat, and a first and second electroactive material, the first electroactive material having a higher energy density than the second electroactive material, and the second electroactive material having a higher rate capability than the first electroactive material. The electrically conductive mat provides a structural and conductive support for at least one of the high-rate and high-energy electroactive materials. The electrodes can be provided in various configurations and be used in high-rate high-energy electrical storage devices to provide improved cycle life.

主权项

1. An electrode for an electrical storage device comprising:
a current collector in the form of a current collector grid or plate; a first electroactive material in a form of a first electroactive material layer; a second electroactive material in a form of a second electroactive material layer; and an electrically conductive mat comprising a porous network of interconnected electrically conductive fibres, forming an electrically conductive mat layer; wherein: the first electroactive material is deposited upon a planar side of the current collector grid or plate, the electrically conductive mat is layered upon the first electroactive material, and the second electroactive material is layered upon the electrically conductive mat; the first electroactive material has a higher energy density than the second electroactive material, and the second electroactive material has a higher rate capability than the first electroactive material; and the electrically conductive mat provides structural and conductive support for at least one of the first electroactive material and the second electroactive material.