Effect of acetylene black on performance of flow electrode capacitive deionization device
Flow electrode capacitive deionization technology(FCDI)presents an effective solution to contin-uous desalination challenges.However,the discontinuity of carbon materials within the flow electrode imposes certain limitations on its desalination performance in practical applications.In order to enhance the current and then improve the desalination capacity of the system,acetylene black,a material characterized by small particle size and high conductivity,was introduced to the flow electrode.The experimental results indicated that,under voltage of 0.7 V,the addition of 20％acetylene black significantly increased the average salt removal efficiency by 127％compared to electrodes without acetylene black.Furthermore,electrodes containing 5％acetylene black demonstrated up to 99.7％current efficiency when a voltage of 1 V was applied;at 0.7 V,its unit energy con-sumption for sodium chloride removal was only 0.33 kW·h/kg.Hence,acetylene black showed broad application prospects in FCDI,offering a viable route to enhance desalination efficiency and reduce energy consumption.
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