4.8 Article

3D Printing of Electron/Ion-Flux Dual-Gradient Anodes for Dendrite-Free Zinc Batteries

Journal

ADVANCED MATERIALS
Volume 35, Issue 17, Pages -

Publisher

WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.202211498

Keywords

3D printing; dendrite-free batteries; dual-gradient electron; ion fluxes; structural designs; zinc-ion batteries

Ask authors/readers for more resources

A 3D-printed electron/ion-flux dual-gradient porous Zn anode is developed to suppress dendrite growth and achieve dendrite-free Zn-ion batteries. The anode establishes dual-gradient electron/ion fluxes by using bottom-rich conductive Ag nanoparticles and zincophilic Ag nanoparticles, enabling bottom-preferential Zn deposition behavior with unimpeded electron transfer and ion diffusion. The design shows excellent performance in terms of low voltage hysteresis and long lifespan, providing a new strategy for next-generation safe and durable Zn-metal batteries.
3D porous Zn-metal anodes have aroused widespread interest for Zn-ion batteries (ZIBs). Nevertheless, the notorious top-growth dendrites caused by the intrinsic top-concentrated ions and randomly distributed electrons may ultimately trigger a cell failure. Herein, an electron/ion-flux dual-gradient 3D porous Zn anode is reported for dendrite-free ZIBs by adopting 3D printing technology. The 3D-printed Zn anode with layer-by-layer bottom-up attenuating Ag nanoparticles (3DP-BU@Zn) establishes dual-gradient electron/ion fluxes, i.e., an internal bottom-up gradient electron flux created by bottom-rich conductive Ag nanoparticles, and a gradient ion flux resulting from zincophilic Ag nanoparticles which pump ions toward the bottom. Meanwhile, the 3D-printing-enabled hierarchical porous structure and continuously conducting network endow unimpeded electron transfer and ion diffusion among the electrode, dominating a bottom-preferential Zn deposition behavior. As a result, the 3DP-BU@Zn symmetrical cell affords highly reversible Zn plating/stripping with an extremely small voltage hysteresis of 17.7 mV and a superior lifespan over 630 h at 1 mA cm(-2) and 1 mAh cm(-2). Meanwhile, the 3DP-BU@Zn//VO2 full cell exhibits remarkable cyclic stability over 500 cycles. This unique dual-gradient strategy sheds light on the roadmap for the next-generation safe and durable Zn-metal batteries.

Authors

I am an author on this paper
Click your name to claim this paper and add it to your profile.

Reviews

Primary Rating

4.8
Not enough ratings

Secondary Ratings

Novelty
-
Significance
-
Scientific rigor
-
Rate this paper

Recommended

No Data Available
No Data Available