Aqueous OH⁻/H⁺ Dual‐Ion Zn‐Based Batteries

Abstract

Aqueous Zn‐based batteries hold multiple advantages of eco‐friendliness, easy accessibility, high safety, easy fabrication, and fast kinetics, while their widespread applications have been greatly limited by the relatively narrow thermodynamically stable potential windows (i. e., 1.23 V) of water and the mismatched pH conditions between cathode and anode, which presents challenges regarding how to maximize the output voltage and the energy density. Recently, aqueous OH−/H+ dual‐ion Zn‐based batteries (OH−/H+‐DIZBs), where the Zn anode reacts with hydroxide ions (OH−) in alkaline electrolyte while hydrogen ions (H+) are involved in the cathode reaction in the acidic electrolyte, have been reported to be capable of broadening the working voltage and improving the energy density, which offers practical feasibility toward overcoming the above limitations. This Review thus takes this chance to investigate the recent progress on aqueous OH−/H+‐DIZBs. First, the concept and the history of such OH−/H+‐DIZBs are introduced, and then special emphasis is put on the working mechanisms, the progress of the development of new batteries, and how the electrolytes improve their performance. Finally, the challenges and opportunities in this field are discussed.

Interface Engineering for 3D Printed Energy Storage Materials and Devices

“…[ 109,110 ] To alleviate the metal dendrite growth issue, the structural design enables a desired digital control for 3D printed anode geometries and has been acknowledged as one of the favored strategies for long‐life metal batteries. [ 111,70 ] Zhang et al employed the projection micro stereolithography (PµSL) 3D printer to obtain 3D polymer lattices, which were then converted into multichannel metal lattices, forming 3D Ni–Zn anodes. [ 59 ] Such 3D structural design with superhydrophilic surfaces was proven effective for localized electric‐field redistribution that promoted preferential homogeneous Zn deposition and reversible Zn plating–stripping for dendrite‐free aqueous Zn‐ion batteries.…”

Bi‐MOF Modulating MnO2 Deposition Enables Ultra‐Stable Cathode‐Free Aqueous Zinc‐Ion Batteries

“…Aqueous zinc ion batteries (ZIBs) show potential application in grid energy storage thanks to their high energy density using a Zn anode, which has a high theoretical gravimetric/volumetric capacity (820 mAh g −1 and 5851 mAh mL −1 ) and suitable redox potential (−0.76 V versus SHE), as well high safety and low cost. [1][2][3][4][5] To date, a few materials, such as manganese oxides, V-based, Prussian blue analogues (PBAs) have been used as the cathode for Zn-ion batteries due to their high charge density and high hydrated ionic radius of Zn 2+ . Among them, MnO 2 is particularly appealing due to its high energy density, earth-abundance, environmental benignity, and low-cost.…”

Regulating the solvation structure with N,N-dimethylacetamide co-solvent for high-performance zinc-ion batteries

“…[1][2][3] Among the promising candidates, aqueous zinc-ion batteries (AZIBs) have emerged as a potential solution for efficient energy storage. [4][5][6] With their impressive electrochemical properties and abundance of zinc resources, AZIBs offer an attractive alternative to traditional lithium-ion batteries (LIBs). [7][8][9] The possible future application of AZIBs in ESSs holds signicant promise due to their high theoretical energy density, low cost, and enhanced intrinsic safety features.…”