Hybrid Organic/Inorganic Interphase for Stabilizing a Zinc Metal Anode in a Mild Aqueous Electrolyte

Abstract

Aqueous rechargeable zinc-based batteries have recently gained tremendous attention because of their low cost and high safety. However, the issues associated with the zinc metal anode, including corrosion, H 2 evolution, and dendrite growth, hinder their practical applications. Herein, we design a hybrid organic/inorganic interphase composed of poly(vinylidene fluoride-cohexafluoropropylene), silica, and zinc triflate to stabilize the zinc metal anode in a mild aqueous electrolyte. It is proven that the artificial interphase reduces corrosion of the Zn metal in the ZnSO 4 electrolyte and suppresses dendrite growth by regulating Zn 2+ deposition. Therefore, the lifespan of symmetrical cells with coated Zn could be enhanced to over 960 h with a stripping/plating capacity of 0.5 mAh cm −2 . In addition, zinc-ion batteries including a sodium vanadate cathode and a coated Zn anode could achieve 3000 cycles with nearly no capacity fading at 5 A g −1 .

Highly robust zinc metal anode directed by organic–inorganic synergistic interfaces for wearable aqueous zinc battery

“…The inorganic ZnF 2 as a rigid layer efficiently inhibits dendrite growth and suppresses side reactions, and the PAA serves as a flexible layer to prevent the fracture of inorganic ZnF 2 and releases the stresses during bending. [20][21][22] SEM images are gathered to observe the surface morphologies of SEI based on different components. As shown in Figure 2B and Figure S1A, the PAA layer tightly covers the metal zinc surface with some visible cracks.…”

“…After activation for several cycles, an in situ PAA‐Zn/ZnF 2 polymer‐inorganic hybrid SEI is obtained. The inorganic ZnF 2 as a rigid layer efficiently inhibits dendrite growth and suppresses side reactions, and the PAA serves as a flexible layer to prevent the fracture of inorganic ZnF 2 and releases the stresses during bending 20–22 …”

Quasi-solid-state electrolytes - strategy towards stabilising Li|inorganic solid electrolyte interfaces in solid-state Li metal batteries

“…Non-volatile, ILE-polymer-ISE QSSEs have also been explored, using either PEO or PVDF-HFP as matrices [Figure 8A] [155,156] . Huo et al proposed a composite electrolyte consisting of Li-salt-free PEO and Li 6.4 La 3 Zr 1.4 Ta 0.6 O 12 (LLZTO) wetted by [Bmim][TFSI] abbreviated as PEO/LLZTO@IL.…”

Selenium doping induced phase transformation and interlayer expansion boost the zinc storage performance of molybdenum disulfide

“…In this respect, rechargeable aqueous zinc-ion batteries (AZIBs) have gradually attracted more attention owing to their relatively low cost, high safety, and environmental friendliness. [4][5][6][7] Currently, various materials have been reported as cathodes for AZIBs, such as Prussian blue analogues, 8 manganese/vanadium-based oxides, [9][10][11] and organic compounds. 12 However, the structural instability of these cathode materials and sluggish Zn ion/electron migration kinetics in host frameworks usually lead to unsatisfactory cycling life and rate performance, which inhibit the practical application of AZIBs.…”