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US 7,662,265 B2Granted
Electrophoretic assembly of electrochemical devices
AssigneesMassachusetts Institute of Technology, A123 Systems, Inc.
InventorsYet-Ming Chiang, Benjamin Hellweg, Richard K. Holman, Steven M. Tobias, Dong-Wan Kim, Ryan Craig Wartena
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Abstract
Methods are provided for making bipolar electrochemical devices, such as batteries, using electrophoresis. A bipolar device is assembled by applying a field that creates a physical separation between two active electrode materials, without requiring insertion of a discrete separator film or electrolyte layer.
Claims20
A method of assembling a bipolar device including a first terminal and a second terminal comprising:
- providing the first terminal in a medium;
- providing particles of a first electroactive material in the medium;
- providing the second terminal in the medium, the second terminal electronically connected to a second electroactive material in the medium;
- generating an electric field causing the particles of the first electroactive material to form an electronically continuous first electrode while creating an electronically insulating separation between the first and second electroactive materials;
- and
- preserving the electronically insulating separation between the first and second electroactive materials.
3 more elements
Dependencies are inferred from the claim text.