. 2018 May 15;8:7578. doi: 10.1038/s41598-018-25789-8

Table 1.

Half-cell testing related data and results.

complexing agent	stability constants			weight loss [mg] after 24 h of discharge test	utilization efficiency η [%]	pH after 24 h of discharge test (7 at 0 h)	discharge voltage [V]_Ag/AgCl after 24 h
complexing agent	log K_{x Fe}^III	log K_{x Mg}^II	Ref.	weight loss [mg] after 24 h of discharge test	utilization efficiency η [%]	pH after 24 h of discharge test (7 at 0 h)	discharge voltage [V]_Ag/AgCl after 24 h
NaCl reference	—	—	—	20.2	13.5	10.2	−1.47
+Tiron	46.9 log K₃	6.86 log K₁	^34,46	60.3	5.0	7.3	−1.75
+salicylate	36.8 log K₃	4.7 log K₁	³⁴	10.0	27.2	9.6	−1.61
+K₂-EDTA	24.23 log K₁	8.64 log K₁	³⁹	34.9	7.8	7.2	−1.58
+glycolate	4.7 log K_i	0.92 log K₁	^34,37	12.6	21.6	9.8	−1.47
+oxalate	20.2 log K₃	4.38 log K₂	³⁹	12.5	21.8	9.9	−1.47
+NTA	24.32 log K₂	10.2 log K₂	³⁹	41.7	6.5	8.3	−1.68
+DBS	n/a	*pK₀^sp = 10.8	⁴⁷	5.6	48.6	6.8	−1.38

Stability constants of complexes formed by the tested battery additives (0.05 M) and weight loss after the Half-cell discharge test in 0.5% NaCl solution (initial anode area = 0.5 cm²). Additionally, utilization efficiency η^18,19, pH value and final voltage (errors within 3%) after 24 h discharge are shown. Substrate = commercial purity Mg (220 ppm Fe).