Exploration of Energy Storage Materials for Water Desalination via Next-Generation Capacitive Deionization

Abstract

Clean energy and environmental protection are critical to the sustainable development of human society. The numerous emerged electrode materials for energy storage devices offer opportunities for the development of capacitive deionization (CDI), which is considered as a promising water treatment technology with advantages of low cost, high energy efficiency, and wide application. Conventional CDI based on porous carbon electrode has low salt removal capacity which limits its application in high salinity brine. Recently, the faradaic electrode materials inspired by the researches of sodium-batteries appear to be attractive candidates for next-generation CDI which capture ions by the intercalation or redox reactions in the bulk of electrode. In this mini review, we summarize the recent advances in the development of various faradaic materials as CDI electrodes with the discussion of possible strategies to address the problems present.

Exploration of the Exceptional Capacitive Deionization Performance of CoMn2O4 Microspheres Electrode

“…[6,7] In the past few decades, capacitive desalination (CDI) has drawn great attentions due to the merits of high desalination capacity, low driven energy consumption, environmental-benign, and easy operation. [8][9][10][11][12][13][14][15] In the early stage of CDI development, the salty ions are stored within the electrical double layer (EDL), which is defined as the interface between the stream and the electrode. The CDI process is triggered by introducing the electrostatic force with a low direct electrical potential (<2 V).…”

Electrochemical investigation of carbon paper/ZnO nanocomposite electrodes for capacitive anion capturing

“…The existing and well-developed desalination techniques, including thermal distillation and reverse osmosis, are not affordable everywhere due to high energy consumption and operational costs. Capacitive deionization (CDI) is a promising alternative technology with higher energy efficiency and lower cost 2 , 3 .…”

Achieving Enhanced Capacitive Deionization by Interfacial Coupling in PEDOT Reinforced Cobalt Hexacyanoferrate Nanoflake Arrays

“…CDI systems have many similarities with electrochemical energy storage devices. [ 39–45 ] Inspired by battery materials, Lee et al. first applied a typical cathode materials of sodium ion batteries in CDI and proposed a novel hybrid CDI system.…”