“…The water-in-salt electrolytes (WiSEs) 5,6 and salt-in-water neutral aqueous electrolytes 7,8 have promised WVWs as wide as those of organic electrolytes. 9 Our group has observed several optimistic issues, [10][11][12] such as an increased stable working voltage window, close to 2 V, and greater safety due to the use of aqueous electrolytes compared to organic or IL electrolytes which are ammable and toxic.…”