Speira Gmbh

Galyna Laptyeva

Volker Denkmann

Ulrich Hampel

Michael Wimmer

Stefan Holz

Günter Schubert

Dirk Calmer

Michael Eberhard

Jan Simmer

The invention relates to a battery electrode foil comprising an aluminium alloy, wherein the aluminium alloy has the following composition in % by weight: Si: 0.01-0.15% by weight, Fe: 0.02-0.4% by weight, Cu: ≤0.08% by weight, Mn: ≤0.03% by weight, Mg: ≤0.03% by weight, Cr: ≤0.01% by weight, Ti: 0.005-0, 03% by weight, wherein the aluminium alloy can contain impurities up to a maximum of 0.05% in each case, in total up to a maximum of 0.15%, the remaining % by weight being aluminium, the proportion of aluminium however being at least 99.35% by weight; wherein the battery electrode foil has intermetallic phases with a diameter length of 0.1 to 1.0 μm with a density of ≤9500 particles/mm. The invention further relates to a method for the production of a battery electrode foil, its use for the production of accumulators, and accumulators containing the battery electrode foil.

Battery electrode foil for the production of lithium-ion accumulators

The invention relates to a battery electrode foil comprising an aluminium alloy, wherein the aluminium alloy has the following composition in weight percent: Si: 0.07-0.12% by weight, Fe: 0.18-0.24% by weight, Cu: 0.03-0.08% by weight, Mn: 0.015-0.025% by weight, Zn: &#x2264;0.01% by weight, Ti: 0.015-0.025% by weight, Zn: &#x2264;0.01% by weight, Ti: 0.015-0.025% by weight, Mn: 0.015-0.025% by weight, Zn: &#x2264;0.01% by weight, Ti: 0.015-0.025% by weight, wherein the aluminium alloy can contain impurities up to a maximum of 0.01% in each case, up to a maximum of 0.03% in total, but the proportion of aluminium must be at least 99.5% by weight; wherein the battery electrode foil has intermetallic phases of a diameter length of 0.1 to 1.0 &#x3bc;m with a density of &#x2264;9500 particles/mm. The invention further relates to a process for the production of a battery electrode foil, its use for the production of accumulators, and accumulators containing the battery electrode foil.

High-strength battery electrode foil for the production of lithium-ion accumulators

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Alfter, Germany

Galyna Laptyeva