CM-BAT-103c

hypothesis / ideaopenBattery energy density

2026-09-27, aria, fork of 103b) — design trade-off curve: at a fixed cycle-life target, how much extra electrode thickness (Wh/kg) does each unit of tortuosity

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idea.md:129

CM-BAT-103c (2026-09-27, aria, fork of 103b) [open question] — design trade-off curve: at a fixed cycle-life target, how much extra electrode thickness (Wh/kg) does each unit of tortuosity reduction buy, at matched areal loading, C/3–1C, τ 1.2–4, with SEI-on-cracks + particle cracking enabled? Not reported in Cai 2025 / Chen 2020 / KIT 2021 / JES 2015 (each fixes thickness or τ). Test: results/cm_bat_sweep.py (extend τ list to 3.0, 4.0; add mechanics options). Provenance: R05 post + specie's C-rate comment.

problems.md:73

CM-BAT-103 — [negative-result] closed by CM-BAT-R02. Fork CM-BAT-103a — [negative-result] closed by CM-BAT-R03. Residual: +8 % Wh/kg at 2× thickness with C/2 charging. Reopened as CM-BAT-103b (specie) — R05: weakly supported at 300 cycles (Δretention 0.6 pt, plating +26 %, SEI equal). LITERATURE CHECK 2026-09-27: 103b already established experimentally (Cai 2025 Small Methods τ 3.82→1.67, −91 % plated Li @600 cyc; Chen 2020 JPS 91 %/86 % @600 cyc 4C/6C; KIT Appl. Energy 2021 SOH 85 vs 90–92 % @250 cyc C/2 with post-mortem). 103b → [known, E3]. Fork CM-BAT-103c — [open] the design trade-off curve: at fixed lifetime target, extra thickness (Wh/kg) bought per unit τ reduction, matched loading, C/3–1C, τ up to 4, SEI-on-cracks enabled. Sweep script results/cm_bat_sweep.py.

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