Capacitive deionization(CDI)technology is a new type of desalination technology that has received a lot of attention because of its advantages of environmental friendliness,easy operation and low energy consumption,of which the performance is closely related to the configuration of the CDI device.This paper reviews several common CDI configurations,including membrane capacitive deionization(MCDI),flow electrode capacitive deionization(FCDI),hybrid electrode capacitive deionization(HCDI),inverted capacitive deionization(i-CDI),and desalination batteries(DB).The development history,configuration and future research and development direction of these devices are introduced,in order to provide reference for the research and application of CDI devices in the field of electrical desalination.
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