Lead-acid battery electrode including carbon fiber material with low surface area
AssigneeArcactive Limited
InventorsJohn Abrahamson, Grigory Isaac Titelman
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Abstract
Lead-acid batteries with low water consumption and hydrogen gassing, comprise electrodes of a carbon fibre material having a surface area of less than 50 m2/g. The carbon fibre material may also comprise non-carbon functional groups less than 22% by mass in the bulk fibre, and at least 78% carbon by mass in the bulk fibre. The carbon fibre material may be heated to a temperature of at least 1000° C. and cooled in an inert atmosphere to prevent non-carbon functional groups reforming on the carbonised carbon fibre material. The batteries are suitable for use in hybrid vehicles.
Claims17
A lead-acid battery or cell including at least one electrode comprising
- a carbon fibre fabric having a surface area of less than 5 m2/g, an areal density of less than 500 g/m2, and wherein non-carbon functional groups in the carbon fibre fabric comprise not more than 20% by mass of the bulk fibre and the carbon fibre fabric comprises at least 80% carbon by mass in the bulk fibre,
- the carbon fibre fabric having impregnated therein an active material comprising Pb-based particles.
Dependencies are inferred from the claim text.