This low-energy and cost-effective process uses carbon nanomaterials as the electrode in capacitive deionisation to remove salt from water. Besides benefiting developing countries, resource-limited areas and those who are unable to afford desalinated water, the technology may help lower the cost of water in Singapore.
You can find more details at https://www.sutd.edu.sg/Research/Research-News/2013/2/Water-Desalination