Reunderstanding aqueous Zn electrochemistry from interfacial specific adsorption of solvation structures

Energy & Environmental Science, Journal Year: 2023, Volume and Issue: 16(7), P. 2910 - 2923

Published: Jan. 1, 2023

Reunderstanding the faradaic reaction mechanism at electrode/electrolyte interface from specific adsorption of solvation structures towards advanced aqueous Zn–Mn batteries.

Language: Английский

---

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

Advanced Materials, Journal Year: 2023, Volume and Issue: 35(17)

Published: Feb. 7, 2023

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

Language: Английский

---

Single atom catalysts for triiodide adsorption and fast conversion to boost the performance of aqueous zinc–iodine batteries

Energy & Environmental Science, Journal Year: 2023, Volume and Issue: 16(10), P. 4630 - 4640

Published: Jan. 1, 2023

In this work, I − poisoning mechanism is proposed for SACs selection to suppress shuttle effect in Zn–I 2 batteries. It found that formation and desorption are crucial maintain the catalytic adsorption role of metallic element.

Language: Английский

---

An Aqueous Electrolyte Regulator for Highly Stable Zinc Anode Under −35 to 65 °C

Advanced Energy Materials, Journal Year: 2023, Volume and Issue: 13(40)

Published: Sept. 13, 2023

Abstract The reversibility and long‐term cycling stability of aqueous zinc‐ion batteries (AZIBs) in a wide temperature range have rarely been explored. Herein, diethylene glycol monoethyl ether (DG) is introduced as an electrolyte additive to enhance Zn performance within −35 65 °C. Operando synchrotron Fourier transform infrared spectroscopy analysis combined with molecular dynamics simulations reveal that the introduction DG disrupts initial hydrogen bonding network electrolyte, restructuring solvation structure surrounding 2+ ions mitigating water‐induced parasitic reactions. Adding reduces freezing point without compromising its incombustibility. Moreover, operando electrochemical quartz crystal microbalance dissipation monitoring (EQCM‐D) X‐ray photoelectron demonstrated coordinated OTF − undergo reductive decomposition, forming self‐healing solid interphase comprising inorganic/organic ZnF 2 ‐ZnS, which can effectively suppress notorious side reactions guide uniform deposition. Consequently, symmetric Zn/Zn cells demonstrate excellent for 3500 h under 1 mA cm −2 at 25 °C, 1000 both Full DG‐containing exhibit long lifespan 5000 cycles A g −1 .

Language: Английский

---

Mitigating the interfacial concentration gradient by negatively charged quantum dots toward dendrite-free Zn anodes

Energy storage materials, Journal Year: 2023, Volume and Issue: 58, P. 215 - 221

Published: March 27, 2023

Language: Английский

---