Direct Measure of Electrode Spatial Heterogeneity: Influence of Processing Conditions on Anode Architecture and Performance
In this work, the spatial (in)homogeneity of aqueous processed silicon electrodes using standard poly(acrylic acid)-based binders and slurry preparation conditions is demonstrated. X-ray nanotomography shows segregation of materials into submicron-thick layers depending on the mixing method and st...
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| Veröffentlicht in: | ACS applied materials & interfaces 2020-12, Vol.12 (50), p.55954-55970 |
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| container_title | ACS applied materials & interfaces |
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| creator | Burdette-Trofimov, Mary K Armstrong, Beth L Nelson Weker, Johanna Rogers, Alexander M Yang, Guang Self, Ethan C Armstrong, Ryan R Nanda, Jagjit Veith, Gabriel M |
| description | In this work, the spatial (in)homogeneity of aqueous processed silicon electrodes using standard poly(acrylic acid)-based binders and slurry preparation conditions is demonstrated. X-ray nanotomography shows segregation of materials into submicron-thick layers depending on the mixing method and starting binder molecular weights. Using a dispersant, or in situ production of dispersant from the cleavage of the binder into smaller molecular weight species, increases the resulting lateral homogeneity while drastically decreasing the vertical homogeneity as a result of sedimentation and separation due to gravitational forces. This data explains some of the variability in the literature with respect to silicon electrode performance and demonstrates two potential ways to improve slurry-based electrode fabrications. |
| doi_str_mv | 10.1021/acsami.0c17019 |
| format | Article |
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| language | eng |
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| source | American Chemical Society Journals |
| subjects | electrode architecture Energy, Environmental, and Catalysis Applications MATERIALS SCIENCE poly(acrylic acid)-based binders silicon electrodes spatial homogeneity x-ray nanotomography |
| title | Direct Measure of Electrode Spatial Heterogeneity: Influence of Processing Conditions on Anode Architecture and Performance |
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