Symmetric
Phthalocyanine Charge Carrier for Dual Redox Flow Battery/Capacitor
Applications
Posted on 2019-08-01 - 12:48
Utilizing
a slurry-based symmetric charge carrier coupled with a conductive
carbon additive is a promising method for developing simple, low-cost,
and stable hybrid electrochemical flow systems for energy storage.
Here, we used a manganese nitride 1,4,8,11,15,18,22,25-octaethoxyphthalocyanine
(EtOPcMnN; 1) as a five-redox-state symmetric
charge carrier for slurry-based dual redox flow battery/capacitor
applications. Electrochemical analyses of 1 revealed
a wide voltage gap, fast heterogeneous electron-transfer rates, and
excellent stability toward galvanostatic cycling. Slurry-state static
cell measurements utilizing 1 with a conductive carbon
additive, Ketjenblack, were performed and showed high faradaic efficiency
and minimal capacity fade using a glass frit porous separator.
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