Optimised energy storage device having capacitor material on lead based negative electrode
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United States of America Patent
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May 30, 2017
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app pub date -
Mar 20, 2008
filing date -
Mar 20, 2007
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Abstract
A lead-acid battery comprising: —at least one negative electrode comprising lead-based battery electrode material and at least one region of capacitor material overlying the lead-based battery electrode material, each electrode being in electrical connection to an outer terminal of the battery, and —at least one positive lead-dioxide based battery electrode, each positive electrode being in electrical connection to a second outer terminal of the battery, —separator interleaving the facing electrodes; —electrolyte filling at least the space of the electrodes and separators wherein the capacitor material overlying the lead-based battery electrode material comprises 20-65% by weight of a high electrical conductivity carbonaceous material, 30-70% of a high specific surface area carbonaceous material, at least 0.1% lead and binder.
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