Journal
ANALYTICAL CHEMISTRY
Volume 91, Issue 24, Pages 15718-15725Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.analchem.9b03907
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Funding
- Natural Sciences and Engineering Research Council of Canada [NSERC RGPIN-2015-06054]
- Mitacs [IT10966S]
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Composite electrodes can significantly improve the performance of an electrochemical device by maximizing surface area and active loading. Typically, additives such as carbon are used to improve conductivity and a polymer is used as a binder, leading to a heterogeneous surface film with thickness on the order of 10 s of micrometers. For such composite electrodes, good ionic conduction within the film is critical to capitalize on the increased loading of active material and surface area. Ionic conductivity within a film can be tricky to measure directly, and homogenization models based on porosity are often used as a proxy. SICM has traditionally been a topography-mapping microscopy method for which we here outline a new function and demonstrate its capacity for measuring ion conductivity within a lithium-ion battery film.
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