Realizing high zinc reversibility in rechargeable batteries

Non-concentrated aqueous electrolytes with organic solvent additives for stable zinc batteries

“…3d shows the voltage profiles of Zn/Ti cells to further evaluate the reversibility of Zn plating/stripping in W4D1 and 2 m W electrolytes, according to a 'reservoir half-cell' protocol. 21 The Zn/Ti cell firstly undergoes two cycles of charge/discharge to mitigate the substrate effects (e.g., lattice mismatch and interphase effects etc.) at 1 mA cm -2 with an areal capacity of 1 mAh cm -2 and an upper cut-off voltage of 0.5 V. Subsequently, 1 mAh cm -2 of Zn (Q p ) is plated on Ti as a Zn reservoir, which is cycled at a fixed capacity of 0.2 mAh cm -2 (Q c ).…”

“…[17][18][19][20] Nonetheless, state-of-the-art RAZBs are plagued by the issues associated with metallic Zn anodes, such as low plating/stripping efficiency, dendrite growth, and unstable Znelectrolyte interface along with water-induced side reactions (e.g., H 2 evolution and surface passivation). 4,21,22 To address these challenges, an efficient strategy is constructing hierarchical structures [23][24][25][26] or modification layers [27][28][29][30] on Zn anodes. Besides, electrolyte modulation is considered as a facile approach to stabilize metal anode by regulating the interface chemistry.…”

Electrolyte Design for In Situ Construction of Highly Zn2+‐Conductive Solid Electrolyte Interphase to Enable High‐Performance Aqueous Zn‐Ion Batteries under Practical Conditions

“…It is well known that the testing conditions have a significant effect on the Zn anode performance. [ 31,32 ] Under long‐term cycling, the unfavorable Zn dendrites, dead Zn, and side reactions proliferate at the electrode–electrolyte interface, leading to continuous consumption of the active Zn and electrolyte. [ 33 ] In most previous reports on AZIBs, however, greatly excessive Zn anode and flooded electrolyte were used to expand their cycle life, which not only mask the problem of low Zn utilization and electrolyte‐induced side reactions, but also make the results difficult to compare and interpret.…”

Computational Screening of the Physical Properties of Water‐in‐Salt Electrolytes**

“…6,8 However, the main reason for the extended voltage window is the formation of a solid electrolyte interface (SEI) layer that mainly consists of LiF as a result of the electrochemical decomposition of the TFSI anion. [9][10][11] Although most of the studies of WiS electrolytes were performed using the LiTFSI salt, [12][13][14][15][16] the WiS concept was extended to other metallic ions such as potassium, 17 sodium [18][19][20] and zinc-based 21 electrolytes.…”