Recent progress and perspectives on aqueous Zn-based rechargeable batteries with mild aqueous electrolytes

Challenges and perspectives for manganese‐based oxides for advanced aqueous zinc‐ion batteries

“…It is not negligible for the impact on battery performance, especially when mass‐produced after commercialization. (b) Theoretically, the aqueous ZIBs generally exhibit low potential due to the narrow electrochemical window of the aqueous solution …”

“…(b) Theoretically, the aqueous ZIBs generally exhibit low potential due to the narrow electrochemical window of the aqueous solution. 56,58,70 In this case, adding additives is proved to effectively inhibit the dissolution of manganese-based materials. For example, in Zn-MnO 2 cell, when MnSO 4 is added into ZnSO 4 electrolyte, the dissolution of α-MnO 2 is relieved because it can change the dissolution equilibrium of Mn 2+ from α-MnO 2 electrodes.…”

“…Recently, aqueous zinc‐ion batteries (ZIBs) have been attracting tremendous interest as the most favorable candidate, since the Zn anode possesses low redox potential, high theoretical capacity, and excellent stability in water . Additionally, divalent zinc ions transfer two electrons, allowing ZIBs to achieve high capacity and an acceptable energy density.…”

“…[45][46][47][48][49][50][51][52] Recently, aqueous zinc-ion batteries (ZIBs) have been attracting tremendous interest as the most favorable candidate, since the Zn anode possesses low redox potential, high theoretical capacity, and excellent stability in water. [53][54][55][56][57][58] Additionally, divalent zinc ions transfer two electrons, allowing ZIBs to achieve high capacity and an acceptable energy density. Different from the traditional LIBs in a rocking-chair fashion, the zinc storage mechanisms in aqueous ZIBs system are intricate and debatable.…”

“…Theoretically, MnO 2 can accommodate one Zn 2+ insertion per formula with a high theoretical capacity of approximately 616 mAh/g, in which the Mn 4+ is reduced to Mn 2+ . To date, numerous MZIBs have been reported with satisfactory electrochemical performances and regarded as very promising candidates for large-scale energy storage [53][54][55][56][57]. …”