TY - JOUR
T1 - A high-performance all-iron non-aqueous redox flow battery
AU - Zhen, Yihan
AU - Zhang, Cuijuan
AU - Yuan, Jiashu
AU - Zhao, Yicheng
AU - Li, Yongdan
PY - 2020/1/1
Y1 - 2020/1/1
N2 - An all-iron non-aqueous redox flow battery (NARFB) based on iron acetylacetonate (Fe(acac)3) anolyte and N-(ferrocenylmethyl)-N,N-dimethyl -N-ethylammonium bis(trifluoromethane-sulfonyl)imide (Fc1N112-TFSI) catholyte with an open circuit voltage of 1.34 V is designed. Due to the high electrochemical activity of the active species, the resultant battery demonstrates fairly high cycling performance and rate capability with anion exchange membrane FAP-375-PP. The Coulombic efficiency (CE) of 98.7%, voltage efficiency (VE) of 84.5%, and energy efficiency (EE) of 83.4% are achieved over 100 cycles at the current density of 10 mA cm−2. VE and EE can be further enhanced by employing mixed-reactant electrolyte as both anolyte and catholyte, which are 89.2% and 85.2%, respectively. The underlying reasons for the capacity decay are discussed for future optimization.
AB - An all-iron non-aqueous redox flow battery (NARFB) based on iron acetylacetonate (Fe(acac)3) anolyte and N-(ferrocenylmethyl)-N,N-dimethyl -N-ethylammonium bis(trifluoromethane-sulfonyl)imide (Fc1N112-TFSI) catholyte with an open circuit voltage of 1.34 V is designed. Due to the high electrochemical activity of the active species, the resultant battery demonstrates fairly high cycling performance and rate capability with anion exchange membrane FAP-375-PP. The Coulombic efficiency (CE) of 98.7%, voltage efficiency (VE) of 84.5%, and energy efficiency (EE) of 83.4% are achieved over 100 cycles at the current density of 10 mA cm−2. VE and EE can be further enhanced by employing mixed-reactant electrolyte as both anolyte and catholyte, which are 89.2% and 85.2%, respectively. The underlying reasons for the capacity decay are discussed for future optimization.
KW - Electrochemical energy storage
KW - Non-aqueous electrolyte
KW - Organometallic materials
KW - Redox flow battery
UR - http://www.scopus.com/inward/record.url?scp=85073680975&partnerID=8YFLogxK
U2 - 10.1016/j.jpowsour.2019.227331
DO - 10.1016/j.jpowsour.2019.227331
M3 - Article
AN - SCOPUS:85073680975
SN - 0378-7753
VL - 445
JO - Journal of Power Sources
JF - Journal of Power Sources
M1 - 227331
ER -