Phased charging and discharging in capacitive desalination

US9758392B2 · kind B2 · utility

Assignees

• Lawrence Livermore National Security, LLC · US
• The Board of Trustees of the Leland Stanford Junior University · US

Inventors

• Michael Stadermann · Pleasanton, US
• Yatian Qu · Sunnyvale, US
• Juan G. Santiago · Fremont, US
• Ali Hemmatifar · Stanford, US

Key dates

• Filing date: Nov 24, 2015
• Grant date: Sep 12, 2017
• Expiry date: Jan 17, 2036

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C02F2201/46135
• WIPO field: Environmental technology
• WIPO sector: Chemistry

Abstract

A system combines complete, ultra-thin cells into a monolithic and robust framework necessary for desalination applications which yields orders of magnitude faster desalination. The electrode pairs are located so that a flow of feed water flows through or around the electrode pairs with the flow perpendicular to sequentially applied electric potentials. The system is controlled to charge the series of electrode pairs sequentially or phased. That means the charging of the second electrode pair is delayed with regard to the charging of the first electrode pair and the charging of a third electrode pair is delayed with respect to the charging of the second electrode pair.