3D confined zinc plating/stripping with high discharge depth and excellent high-rate reversibility

Abstract

Confining Zn plating and stripping in a robust and conductive 3D carbon nanotube network results in an electrode, which shows excellent reversibility at high depth of discharge and enables zinc-ion batteries with high-rate and long-term performance.

Pencil Drawing Stable Interface for Reversible and Durable Aqueous Zinc‐Ion Batteries

“…As known, this phenomenon is mainly created by the combination of interface resistance ( R f ) and charge‐transfer resistance ( R ct ). [ 46 ] Relatively low value of R ct (320 Ω) for the Zn–G (453 Ω for the pure Zn) is highly attributed to the improved surface properties. Meanwhile, the lower ohmic resistance ( R s ) of the Zn–G (5.1 Ω) than the Zn (6.2 Ω) further suggests the good contact enabled by the addition of soft graphite (Figure S7a, Supporting Information).…”

Dendrite suppression by anode polishing in zinc-ion batteries

“…12 Common strategies to achieve uniform Zn deposition include (1) introducing a protection layer on the electrode surface to help homogeneously distribute ions and the electric eld; 13,14 (2) optimizing the material and structure of the Zncontaining electrode, promoting charge transfer; 15,16 (3) modifying the electrolyte, improving interfacial ion migration; [17][18][19] and (4) designing multifunctional separators. 20 Example solutions using these strategies include (1) interfacial protection of the Zn anode by in situ growth of zeolitic imidazolate framework-8 (ZIF-8) layers; 14 (2) design of Zn/carbon nanotube (Zn/CNT) foams 15 or eutectic Zn 88 Al 12 (at%) alloys; 16 (3) electrolyte modifying additives 17,18 or use of high concentration electrolytes; 19 and (4) graphene decorated glass bre separators. 20 All of these solutions, and many others suggested in the literature, would make the commercialisation of ZIBs more difficult by adding additional levels of complexity to both the chemistry and cell design.…”

Stratified Zinc‐Binding Strategy toward Prolonged Cycling and Flexibility of Aqueous Fibrous Zinc Metal Batteries

“…Nevertheless, they also accompany complicated preparation, [ 4 ] long period of selection [ 8 ] about suitable materials or many other disadvantages. [ 9 ] Constructing a 3D anode structure is a new feasible strategy to attain dendrites free, [ 10 ] where the Zn deposition is proposed to be trapped inside the pores of the structure. Among the various 3D structures, [ 9 ] general metal foams frequently serve as the anode because the typical porous structure greatly enlarges the specific surface area, further expanding the cation adsorption on the anode surface.…”

“…[ 9 ] Constructing a 3D anode structure is a new feasible strategy to attain dendrites free, [ 10 ] where the Zn deposition is proposed to be trapped inside the pores of the structure. Among the various 3D structures, [ 9 ] general metal foams frequently serve as the anode because the typical porous structure greatly enlarges the specific surface area, further expanding the cation adsorption on the anode surface. [ 10,11 ] However, dendrites puncture cannot effectively mitigate in such foams due to the “top growth” mode, which has been reported in several previous studies.…”