氧化还原
法拉第效率
水溶液
膦酸盐
化学
流动电池
电子转移
配体(生物化学)
无机化学
氯化物
化学工程
电化学
电极
光化学
有机化学
物理化学
工程类
受体
电解质
生物化学
作者
Gabriel Sikukuu Nambafu,Aaron M. Hollas,Shuyuan Zhang,Peter Rice,Daria Boglaienko,John L. Fulton,Minyuan M. Li,Qian Huang,Yu Zhu,David Reed,Vincent Sprenkle,Guosheng Li
标识
DOI:10.1038/s41467-024-45862-3
摘要
Abstract A promising metal-organic complex, iron (Fe)-NTMPA 2 , consisting of Fe(III) chloride and nitrilotri-(methylphosphonic acid) (NTMPA), is designed for use in aqueous iron redox flow batteries. A full-cell testing, where a concentrated Fe-NTMPA 2 anolyte (0.67 M) is paired with a Fe-CN catholyte, demonstrates exceptional cycling stability over 1000 charge/discharge cycles, and noteworthy performances, including 96% capacity utilization, a minimal capacity fade rate of 0.0013% per cycle (1.3% over 1,000 cycles), high Coulombic efficiency and energy efficiency near 100% and 87%, respectively, all achieved under a current density of 20 mA·cm - ². Furthermore, density functional theory unveils two potential coordination structures for Fe-NTMPA 2 complexes, improving the understanding between the ligand coordination environment and electron transfer kinetics. When paired with a high redox potential Fe-Dcbpy/CN catholyte, 2,2′-bipyridine-4,4′-dicarboxylic (Dcbpy) acid and cyanide (CN) ligands, Fe-NTMPA 2 demonstrates a notably elevated cell voltage of 1 V, enabling a practical energy density of up to 9 Wh/L.
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