Highly conductive colloidal carbon based suspension for flow-assisted electrochemical systems

iScience

Philippe Poulin¹  Katerina Kampioti²  Wilfrid Neri²  Jinkai Yuan²  Marco S. Alfonso²  Annie Colin²  Eric Laurichesse²  Hélène Parant² 

[1]Université PSL, MIE-CBI ESPCI Paris 10 Rue Vauquelin, Paris 75005, France

[2]Centre de Recherche Paul Pascal, CNRS, Université de Bordeaux, 115 Avenue Schweitzer, 33600, Pessac, France

关键词: Electrochemical energy storage;    Energy storage;    Physical chemistry;   

DOI  :  

来源: DOAJ

【 摘 要 】

Summary: Carbon suspension electrodes are promising for flow-assisted electrochemical energy storage systems. They serve as flowable electrodes in electrolyte solutions of flow batteries, or flow capacitors. They can also be used for other applications such as capacitive deionization of water. However, developments of such suspensions remain challenging. The suspensions should combine low viscosity and high electronic conductivity for optimized performances. In this work, we report a flowable aqueous carbon dispersion which exhibits a viscosity of only 2 Pa.s at a shear rate of 5 s−1 for a concentration of particles of 7 wt%. This suspension displays an electronic conductivity of 65 mS/cm, nearly two orders of magnitude greater than previously investigated related materials. The investigated suspensions are stabilized by sodium alginate and arabic gum in the presence of ammonium sulfate. Their use in flowable systems for the storage and discharge of electrical charges is demonstrated.

【 授权许可】

Unknown