Table 2. NLLS Analyses Performed on the Nyquist Plots (Figure 2d–f) by Using a Boukamp Tool^52,53 (See Table 1 for Samples’ Acronyms).

material	cell condition	equivalent circuit	R1 [Ω]	R2 [Ω]	R1 + R2	χ2
Al	OCV	Re(R1Q1)(R2Q2)	35.2 ± 2.3	13.9 ± 4.6	49.1 ± 6.9	6 × 10–4
	1 CV cycle	Re(R1Q1)(R2Q2)	31.2 ± 8.5	29.5 ± 8.7	60.7 ± 17.2	9 × 10–5
	5 CV cycles	Re(R1Q1)(R2Q2)	33.0 ± 4.7	28.0 ± 5.0	61 ± 9.7	5 × 10–5
Al_FLGP_50	OCV	Re(R1Q1)(R2Q2)Qw	22.9 ± 0.3	6.2 ± 0.4	29.1 ± 0.7	8 × 10–5
	1 CV cycle	Re(R1Q1)(R2Q2)Qw	5.9 ± 0.2	6.0 ± 0.6	11.9 ± 0.8	5 × 10–4
	5 CV cycles	Re(R1Q1)(R2Q2)Qw	5.9 ± 0.2	5.5 ± 0.4	11.4 ± 0.6	3 × 10–4
Al_FLGP_60	OCV	Re(R1Q1)(R2Q2)Qw	22.4 ± 0.7	11.6 ± 1.2	34.0 ± 1.9	4 × 10–4
	1 CV cycle	Re(R1Q1)(R2Q2)Qw	3.6 ± 0.2	5.9 ± 0.5	9.5 ± 0.7	5 × 10–4
	5 CV cycles	Re(R1Q1)(R2Q2)Qw	3.4 ± 0.2	5.2 ± 0.4	7.6 ± 0.6	5 × 10–4