Table 2.

Longitudinal and transverse ¹³C relaxation time constants T₁ and T₂ of ${{\mathrm{HCO}}_3}^{-}$ signal components during each experimental stage at 10 ^∘C (14.1 T).

Stage	Species	Component	T1 [s]	T2 [s]
OCV	CO2	Full signal	13.18 ± 0.71	2.15 ± 0.25
	${{\mathrm{HCO}}_3}^{-}$	Coalesced signal	11.73 ± 0.05	0.81 ± 0.01
		B0 distortion	11.75 ± 0.40	0.69 ± 0.03
CA	CO2	Full signal	12.39 ± 0.76	1.08 ± 0.13
	${{\mathrm{HCO}}_3}^{-}$	Free ions	11.52 ± 0.09	1.00 ± 0.01
		xSIPs	10.69 ± 0.10	0.79 ± 0.02
		B0 distortion	12.96 ± 0.15	1.05 ± 0.02
CP	CO2	Full signal	11.43 ± 1.41	0.78 ± 0.17
	${{\mathrm{HCO}}_3}^{-}$	Free ions	13.91 ± 0.13	1.34 ± 0.01
		xSIPs	10.95 ± 0.12	0.93 ± 0.02
		B0 distortion	13.06 ± 0.35	1.19 ± 0.03

The error represents the fitting error received for T₁ and T₂ determination. The term xSIP represents ion pairs with one (x = 1) or two (x = 2) solvent layers between anion and cation.