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High capacity alkaline cell utilizing cathode extender

A supplementary, battery technology, applied in the direction of alkaline battery electrodes, battery electrodes, circuits, etc.

Inactive Publication Date: 2007-08-15
ROVCAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The cathode contains the basic active material

Method used

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  • High capacity alkaline cell utilizing cathode extender
  • High capacity alkaline cell utilizing cathode extender
  • High capacity alkaline cell utilizing cathode extender

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[0080] Figure 10 shows the discharge characteristics of an alkaline cell with a cathode containing 90% EMD and 10% ultrafine particle sprayed CuO (as supplement) at a continuous current discharge of 12.5mA (equivalent to 250mA for AA), where the weight of CuO Percentages are measured as a percentage of the entire cathode active material. Also shows commercial Zn / MnO 2 The discharge curves of batteries (Rayovac brand) were used for comparison. It can be seen that up to a 45% increase in discharge capacity can be obtained by increasing the anode / basic cathode capacity ratio in combination with a lower zinc filling in the zinc gel to a cutoff of 0.9V. A commercial cell with an anode-confined design and a capacity ratio of about 0.95:1 failed abruptly as indicated by the drastic drop in cell voltage. Since many devices continue to operate even below 0.9V, batteries containing supplements can provide greater than 50% increased capacity. The presence of the supplement greatly ext...

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Abstract

An electrochemical cell is provided that includes a container, a cathode and anode disposed in the container, and a separator disposed between the anode and cathode. The cell further includes an extender either included in or separate from the cathode. An agent is further provided that interacts with soluble ionic species generated in the cathode to prevent the migration of the species to the anode.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of US Provisional Patent Application 60 / 528,414, filed December 10, 2003, the disclosure of which is incorporated herein by reference in its entirety. [0003] Statement Regarding Federal Funding for Research and Development Not applicable. technical field [0004] The market for consumer alkaline batteries continues to demand higher capacity in standard sized batteries to support longer run times for battery-operated devices. Due to the electrochemical capacity of the materials used, conventional alkaline Zn anodes / MnO 2 The discharge efficiency of the cathode cell is reaching its limit. The present invention relates to alkaline batteries, which have a higher than hitherto traditional alkaline Zn / MnO 2 The battery may have a higher capacity. Conventional alkaline batteries typically contain a cathode active material such as MnO 2 ), while cells constructed in accordance with cert...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/48H01M4/62H01M4/24H01M4/36
CPCY02E60/124H01M4/24H01M4/48H01M4/624H01M4/364H01M4/366Y02E60/10
Inventor W·C·布尚P·奇斯曼G·J·戴维松Z·金E·莫滕森E·恩泽贝特K·拉马斯瓦米V·H·乌
Owner ROVCAL