Scaling‐Up Insights for Zinc–Air Battery Technologies Realizing Reversible Zinc Anodes

Advanced Materials, Journal Year: 2023, Volume and Issue: 35(48)

Published: Sept. 26, 2023

Zinc-air battery (ZAB) technology is considered one of the promising candidates to complement existing lithium-ion batteries for future large-scale high-energy-storage demands. The scientific literature reveals many efforts ZAB chemistries, materials design, and limited accounts cell design principles with apparently superior performances liquid solid-state electrolytes. However, along difficulty forming robust solid-electrolyte interphases, discrepancy in testing methods assessment metrics severely challenges realistic evaluation/comparison commercialization ZABs. Here, strategies formulate reversible zinc anodes are proposed specific cell-level energy (100-500 Wh kg-1 ) long-cycling operations realized. Stabilizing anode/electrolyte interfaces results a cumulative capacity 25 Ah cm-2 Coulomb efficiency >99.9% 5000 plating/stripping cycles. Using 1-10 scale (≈500 at level) zinc-air pouch cells, scale-up insights Ah-level ZABs that can progress from lab-scale research practical production also offered.

Language: Английский

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Interfacial Reconstruction for Regulating Zn²⁺ Deposition toward Ultrastable Zn Metal Anodes

ACS Applied Materials & Interfaces, Journal Year: 2023, Volume and Issue: 15(22), P. 26718 - 26727

Published: May 23, 2023

Rechargeable aqueous zinc-ion batteries (AZIBs) are attracting much attention as high-density energy storage systems owing to their fascinating features with low cost, high safety, and simple manufacturing process. However, the commercialization of Zn anodes is hindered by uncontrollable dendrite growth water-induced side reactions. Herein, a spontaneous reconstruction honeycomb-structural hopeite layer (ZPO) on metal anode (Zn@ZPO) rationally developed functional protection interface liquid-phase deposition strategy. The formed ZPO not only promotes ion/charge transport restrains corrosion but also modulates preferred orientation Zn(002) nanosheet for dendrite-free anode. Accordingly, Zn@ZPO symmetric cell exhibits satisfactory cycle lifespans 1500 h at 1 mA·cm-2/1 mAh·cm-2 1400 5 mA m-2/1 mAh·cm-2. When assembled (NH4)2V10O25·8H2O (NVO) cathode, Zn@ZPO||NVO full delivers an ultrastable cycling lifespan 25 000 cycles discharge capacity retention 86.6% A·g-1. Therefore, this work will pave novel avenue constructing AZIBs.

Language: Английский

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Manipulating Coulombic Efficiency of Cathodes in Aqueous Zinc Batteries by Anion Chemistry

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 62(23)

Published: April 5, 2023

Abstract Electrolyte environments, including cations, anions, and solvents are critical for the performance delivery of cathodes batteries. Most works focused on interactions between cations cathode materials, in contrast, there is a lack in‐depth research correlation anions cathodes. Here, we systematically investigated how manipulate coulombic efficiency (CE) zinc We take intercalation‐type V 2 O 5 conversion‐type I as typical cases profound studies. It was found that electronic properties charge density its distribution, can tune conversion or intercalation reactions, leading to significant CE differences. Using operando visual Raman microscopy theoretical simulations, confirm competitive coordination − regulate CEs by modulating polyiodide diffusion rates Zn−I cells. In Zn−V cells, anion‐tuned solvation structures vastly affect through varying Zn 2+ kinetics. Conversion achieves 99 % with highly electron‐donating while preferable interact strongly afford an nearly 100 CE. Understanding mechanism anion‐governed will help us evaluate compatibility electrolytes electrodes, thus providing guideline anion selection electrolyte design high‐energy, long‐cycling

Language: Английский

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Completely Activated and Phase‐Transformed KFeMnHCF for Zn/K Hybrid Batteries with 14 500 Cycles by an OH‐Rich Hydrogel Electrolyte

Advanced Materials, Journal Year: 2023, Volume and Issue: 36(17)

Published: July 4, 2023

Abstract Metal hexacyanoferrates are recognized as superior cathode materials for zinc and hybrid batteries, particularly the Prussian blue analog (PBA). However, PBA development is hindered by several limitations, including small capacities (<70 mAh g −1 ) short lifespans (<1000 cycles). These limitations generally arise due to incomplete activation of redox sites structure collapse during intercalation/deintercalation metal ions in PBAs. According this study, adoption a hydroxyl‐rich (OH‐rich) hydrogel electrolyte with extended electrochemical stability windows (ESWs) can effectively activate site low‐spin Fe K x y Mn 1− [Fe(CN) 6 ] w ·zH 2 O (KFeMnHCF) while tuning its structure. Additionally, strong adhesion inhibits KFeMnHCF particles from falling off dissolving. The easy desolvation developed OH‐rich electrolytes lead fast reversible cathode. As result, Zn||KFeMnHCF batteries achieve unprecedented characteristics 14 500 cycles, 1.7 V discharge plateau, 100 capacity. results study provide new understanding present promising material application.

Language: Английский

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Perovskite Cathodes for Aqueous and Organic Iodine Batteries Operating Under One and Two Electrons Redox Modes

Advanced Materials, Journal Year: 2023, Volume and Issue: 36(4)

Published: Aug. 17, 2023

Abstract Although conversion‐type iodine‐based batteries are considered promising for energy storage systems, stable electrode materials scarce, especially high‐performance multi‐electron reactions. The use of tin‐based iodine‐rich 2D Dion–Jacobson (DJ) ODASnI 4 (ODA: 1,8‐octanediamine) perovskite as cathode is suggested. As a proof concept, organic lithium‐perovskite and aqueous zinc‐perovskite fabricated they can be operated based on the conventional one‐electron advanced two‐electron transfer modes. active elemental iodine in provides capacity through reversible I − /I + redox pair conversion at full depth, rapid electron injection/extraction leads to excellent reaction kinetics. Consequently, high discharge plateaus (1.71 V vs Zn 2+ /Zn; 3.41 Li /Li), large (421 mAh g −1 ), low decay rate (1.74 mV ) achieved lithium zinc ion batteries, respectively. This study demonstrates potential metal‐iodine batteries. Their reactions mechanism shed light similar battery systems aiming decent operational stability density.

Language: Английский

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