有前途的有机液流电池.pdf

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1、Csar L.Usma,Juan M Rodrguez,Cristina Flox*Promising organic flow batteriesSenior Researcher in Flow Batteries at Electrical Department cristina.floxciiae.orgMain buildingPilot Plant building1MW-VRFBOrganic molecules species to drive RFBTang et al.Cell Reports Physical Science 3,101195,21,2022 Long-t

2、erm stability issuesDegradationMembrane Crossover Low power density/operational current density Poor energy density for low solubility(mM)DRAWBACKSK2GABA-NDI4-Hydroxy TEMPO Solubility in mild pH:Reduces corrosion of cell components;Is safer and more environmentally friendly and Minimizes degradation

3、 of sensitive organic species Up to 0.4 M in 1 M NaCl with 2-electron transfer:Theoretical capacity 1.71 Ah 11 gK-Functionalized NDIGABA as Targeted Redox-Active MoleculesK2GABA-NDIYield 95%Yield 85%GABA-NDIPrecursorsBENEFITSBeyond Molecules:The Electrode as a Key Limiting Factor for Power Density O

4、xygen rich groups by thermal treatment in air:Thermal treatment 48 h at 450C(HT)Combination of Oxygen and Nitrogen groups by with thermal treatment with a glucosamine hydrochloride polymer(HTGA)Incorporation of oxygen groups by OXYGEN ION BEAM:Beam energy:1 MeV,Current:0,9 A,dose:1x1015atoms/cm2(Oxy

5、gen irradiation)Reaction kinetics at the electrode surface Electronic conductivity Wettability Mass transport:facilitated by their 3D porous network,which enables efficient diffusion of redox species throughout the electrode structureROLESURFACE FUNCTIONALIZATION OF COMMERCIAL ELECTRODE SURFACEBOOST

6、ING ORFB POWER via ELECTRODE FUNCTIONALIZATIONRole of Oxygen and Nitrogen Atoms in Electrode Surface EngineeringOperational Conditions:80 mL 40 mM K2GABA-NDI80 mL 80 mM TEMPO100mAcm-2Contact angle measurementsSurface Wetting behaviour of functionalized electrodesPristine(angle=12