Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Charge Transfer Kinetics at the Solid-Solid Interface in Porous
  Electrodes   Interfacial charge transfer is widely assumed to obey Butler-Volmer kinetics.
For certain liquid-solid interfaces, Marcus-Hush-Chidsey theory is more
accurate and predictive, but it has not been applied to porous electrodes. Here
we report a simple method to extract the charge transfer rates in carbon-coated
LiFePO4 porous electrodes from chronoamperometry experiments, obtaining curved
Tafel plots that contradict the Butler-Volmer equation but fit the
Marcus-Hush-Chidsey prediction over a range of temperatures. The fitted
reorganization energy matches the Born solvation energy for electron transfer
from carbon to the iron redox site. The kinetics are thus limited by electron
transfer at the solid-solid (carbon-LixFePO4) interface, rather than by ion
transfer at the liquid-solid interface, as previously assumed. The proposed
experimental method generalizes Chidsey's method for phase-transforming
particles and porous electrodes, and the results show the need to incorporate
Marcus kinetics in modeling batteries and other electrochemical systems.

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The categories of this paper are: cs
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The categories of this paper are: nucl-th
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The categories of this paper are: gr-qc
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The categories of this paper are: supr-con
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The categories of this paper are: ao-sci
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The categories of this paper are: hep-th
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The categories of this paper are: quant-ph
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The categories of this paper are: math
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The categories of this paper are: solv-int
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The categories of this paper are: acc-phys
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The categories of this paper are: q-alg
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The categories of this paper are: econ
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The categories of this paper are: comp-gas
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The categories of this paper are: dg-ga
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The categories of this paper are: atom-ph
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The categories of this paper are: mtrl-th