原位表征技术在水系有机液流电池中的研究进展
张永辉1,2(
), 傅杰1, 李先锋2(), 张长昆2()
), 傅杰1, 李先锋2(), 张长昆2()
Research progress on in-situ characterization techniques for aqueous organic flow batteries
Yonghui ZHANG1,2(), Jie FU1, Xianfeng LI2(), Changkun ZHANG2()
), Jie FU1, Xianfeng LI2(), Changkun ZHANG2()
图9. a，d 10 mM DHAQ 与15 mM K4[Fe(CN)6] and 3.75 mM K3[Fe(CN)6] 组装的全电池电压随时间变化的曲线图。b负极电解质芳环区的NMR谱图。c负极电解液的EPR谱图。e，f DHAQ3–?自由基浓度随时间变化的分别通过NMR光谱中水共振的体磁化率位移和EPR实验中的自旋计数来估计。d自由基的分数作为总浓度10,100和200mm DHAQ的电荷状态的函数。
Fig.9. a, d Voltage of a 10 mM DHAQ versus 15 mM K4[Fe(CN)6] and 3.75 mM K3[Fe(CN)6] full cell as a function of time. b NMR spectra of the anolyte in the aromatic region. c EPR spectra of the anolyte. e, f Concentrations of DHAQ3–? radical anions as a function of time, estimated from the bulk magnetic susceptibility shift of the water resonance in the NMR spectra and by spin counting in the EPR experiments, respectively. d Fractions of radicals as a function of state of charge for total concentrations of 10, 100, and 200 mM DHAQ.
