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| Format: | Preprint |
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2026
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| Online Access: | https://arxiv.org/abs/2605.10217 |
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| _version_ | 1866913111182671872 |
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| author | Bae, Changdeuck |
| author_facet | Bae, Changdeuck |
| contents | Solid-electrolyte interphase (SEI) growth is widely modeled cell-by-cell with chemistry-specific closures, yet its underlying kinetic scaling is rarely tested across chemistries. By compiling cycle-resolved data from public long-cycle datasets covering four anode configurations -- graphite, silicon composite, lithium metal, and anode-free -- we show that the cumulative interphase-loss index Lambda_int obeys the parabolic law Lambda_int = A_chem * sqrt(1 - Theta_Li) in three of the four chemistries, with an exponent indistinguishable from alpha = 1/2 within experimental uncertainty. The chemistry-specific prefactor A_chem spans an order of magnitude, but the diffusion-limited parabolic kinetics is preserved. The fourth chemistry, anode-free configurations, deviates with a super-parabolic exponent alpha approx 0.77, consistent with a nucleation-controlled growth regime. We rationalize the result using the Tammann-Deal-Grove parabolic-growth framework adapted to interphase formation and identify the conditions under which universality is recovered. The observed regularity reduces SEI modeling complexity to a single rate constant per chemistry and provides a sharp falsifiable test for next-generation cell formats. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2605_10217 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Parabolic-growth universality and its nucleation-driven breakdown across lithium-battery anode chemistries Bae, Changdeuck Materials Science Solid-electrolyte interphase (SEI) growth is widely modeled cell-by-cell with chemistry-specific closures, yet its underlying kinetic scaling is rarely tested across chemistries. By compiling cycle-resolved data from public long-cycle datasets covering four anode configurations -- graphite, silicon composite, lithium metal, and anode-free -- we show that the cumulative interphase-loss index Lambda_int obeys the parabolic law Lambda_int = A_chem * sqrt(1 - Theta_Li) in three of the four chemistries, with an exponent indistinguishable from alpha = 1/2 within experimental uncertainty. The chemistry-specific prefactor A_chem spans an order of magnitude, but the diffusion-limited parabolic kinetics is preserved. The fourth chemistry, anode-free configurations, deviates with a super-parabolic exponent alpha approx 0.77, consistent with a nucleation-controlled growth regime. We rationalize the result using the Tammann-Deal-Grove parabolic-growth framework adapted to interphase formation and identify the conditions under which universality is recovered. The observed regularity reduces SEI modeling complexity to a single rate constant per chemistry and provides a sharp falsifiable test for next-generation cell formats. |
| title | Parabolic-growth universality and its nucleation-driven breakdown across lithium-battery anode chemistries |
| topic | Materials Science |
| url | https://arxiv.org/abs/2605.10217 |