Breaking the 2 V Barrier in Aqueous Zinc Chemistry: Creating 2.45 and 2.8 V MnO<sub>2</sub>–Zn Aqueous Batteries Gautam G. Yadav Damon Turney Jinchao Huang Xia Wei Sanjoy Banerjee 10.1021/acsenergylett.9b01643.s001 https://acs.figshare.com/articles/journal_contribution/Breaking_the_2_V_Barrier_in_Aqueous_Zinc_Chemistry_Creating_2_45_and_2_8_V_MnO_sub_2_sub_Zn_Aqueous_Batteries/9642887 We report for the first time the creation of 2.45 and 2.8 V aqueous manganese dioxide (MnO<sub>2</sub>)|zinc (Zn) batteries without the use of expensive ion-selective membranes separating the anodes and cathodes. This new high-voltage aqueous battery (HiVAB) is able to charge and discharge 20–100% of MnO<sub>2</sub>’s theoretical capacity (308 mAh/g) repeatedly for many cycles, thereby establishing this new MnO<sub>2</sub>|Zn battery as the forerunner for the possible replacement of lithium-ion batteries for applications where cost, safety, and energy density characteristics are considered paramount. 2019-08-18 19:29:18 2.8 V MnO Zn Aqueous Zinc Chemistry energy density characteristics 2.45 lithium-ion batteries 2 V Barrier ion-selective membranes manganese dioxide