کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6601251 | 459317 | 2015 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Morphology of nanoporous carbon-binder domains in Li-ion batteries-A FIB-SEM study
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Morphology of nanoporous carbon-binder domains in Li-ion batteries-A FIB-SEM study Morphology of nanoporous carbon-binder domains in Li-ion batteries-A FIB-SEM study](/preview/png/6601251.png)
چکیده انگلیسی
FIB-SEM tomography is used to reconstruct the carbon-binder domain (CBD) of a LiCoO2 battery cathode (3.9 Ã 5 Ã 2.3 μm3) with contrast enhancement by ZnO infiltration via atomic layer deposition. We calculate the porosity inside the CBD (57.6%), the cluster-size distribution with a peak at 54 nm, and the pore-size distribution with a peak at 64 nm. The tortuosities of the pore space (1.6-2.0) and the CBD (2.3-3.5) show a mild anisotropy, which is attributed to the fabrication process. A comparison to a modeled homogenous CBD reveals that clustering in the CBD decreases its electronic conductivity while increasing the ionic diffusivity. To account for the higher calculated diffusivity compared to experimental values from literature, a simple binder swelling model is implemented, suggesting a swelling of 75 vol%. The prevention of both clustering and swelling could increase the volume available for active material and therefore the energy density.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Electrochemistry Communications - Volume 60, November 2015, Pages 176-179
Journal: Electrochemistry Communications - Volume 60, November 2015, Pages 176-179
نویسندگان
Severin Vierrath, Lukas Zielke, Riko Moroni, Andrew Mondon, Dean R. Wheeler, Roland Zengerle, Simon Thiele,