The mixing entropy battery and other processes described here represent not only a novel type of electrochemical system compared to existing technologies but also a very promising technology whose practical application can make a significant contribution to the field of renewable energy production. This process for generating electrical energy (Figure 1a) could also be reversed, and exploited as a method for water desalination. Future work will focus on cell geometry optimization and the development of materials which can be used to replace silver as the anionic electrode.