Carbon-Based Bipolar Membranes for Bipolar Stacked Solid-State Batteries
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United States of America
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Feb 20, 2025
app pub date -
Aug 18, 2023
filing date -
Aug 18, 2023
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Abstract
Lightweight, electrically conductive, and mechanically robust carbon nanomaterials in the form of films and membranes are used as electrochemically inert bipolar membranes for bipolar-stacked solid state batteries (SSBs). Bipolar plates are electrochemically inert and electrically conductive layers serially connecting adjacent solid-state unit cells but isolating the electrochemistry in each individual cell. The use of bipolar plates to form bipolar stacks is unique to SSBs. Such arrangement would significantly reduce the battery packaging weight because there is no need to seal and provide external connections to each individual unit cells as required in conventional batteries with liquid electrolytes. Reducing the weight of bipolar plates without compromising their other requirements especially electrical conductivity is highly desirable in improving the overall specific energy for packaged bipolar SSB stacks.
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