A biocompatible electrolyte enables highly reversible Zn anode for zinc ion battery

Nature Communications, Journal Year: 2023, Volume and Issue: 14(1)

Published: Oct. 16, 2023

Progress towards the integration of technology into living organisms requires power devices that are biocompatible and mechanically flexible. Aqueous zinc ion batteries use hydrogel biomaterials as electrolytes have emerged a potential solution operates within biological constraints; however, most these feature inferior electrochemical properties. Here, we propose electrolyte by utilising hyaluronic acid, which contains ample hydrophilic functional groups. The gel-based offers excellent anti-corrosion ability for anodes regulates nucleation/growth. Also, gel provides high battery performance, including 99.71% Coulombic efficiency, over 5500 hours long-term stability, improved cycle life 250 under utilization rate 80%, biocompatibility. Importantly, Zn//LiMn2O4 pouch cell exhibits 82% capacity retention after 1000 cycles at 3 C. This work presents promising chemistry controls behaviour, offering great in energy-related applications beyond.

Language: Английский

---

Enabling selective zinc-ion intercalation by a eutectic electrolyte for practical anodeless zinc batteries

Nature Communications, Journal Year: 2023, Volume and Issue: 14(1)

Published: May 27, 2023

Two major challenges hinder the advance of aqueous zinc metal batteries for sustainable stationary storage: (1) achieving predominant Zn-ion (de)intercalation at oxide cathode by suppressing adventitious proton co-intercalation and dissolution, (2) simultaneously overcoming Zn dendrite growth anode that triggers parasitic electrolyte reactions. Here, we reveal competition between Zn2+ vs intercalation chemistry a typical using ex-situ/operando techniques, alleviate side reactions developing cost-effective non-flammable hybrid eutectic electrolyte. A fully hydrated solvation structure facilitates fast charge transfer solid/electrolyte interface, enabling dendrite-free plating/stripping with remarkably high average coulombic efficiency 99.8% commercially relevant areal capacities 4 mAh cm-2 function up to 1600 h 8 cm-2. By concurrently stabilizing redox both electrodes, achieve new benchmark in battery performance anode-free cells retain 85% capacity over 100 cycles 25 °C. Using this eutectic-design electrolyte, | |Iodine full are further realized 86% retention 2500 cycles. The approach represents avenue long-duration energy storage.

Language: Английский

---

Hetero Nucleus Growth Stabilizing Zinc Anode for High-Biosecurity Zinc-Ion Batteries

Nano-Micro Letters, Journal Year: 2023, Volume and Issue: 15(1)

Published: Oct. 26, 2023

Biocompatible devices are widely employed in modernized lives and medical fields the forms of wearable implantable devices, raising higher requirements on battery biocompatibility, high safety, low cost, excellent electrochemical performance, which become evaluation criteria toward developing feasible biocompatible batteries. Herein, through conducting implantation tests leakage scene simulations New Zealand rabbits, zinc sulfate electrolyte is proved to exhibit biosecurity turns out be one ideal salts for zinc-ion batteries (ZIBs). Furthermore, order mitigate notorious dendrite growth hydrogen evolution mildly acidic as well improve their operating stability, Sn hetero nucleus introduced stabilize anode, not only facilitates planar deposition, but also contributes overpotential. Finally, a long lifetime 1500 h symmetrical cell, specific capacity 150 mAh g-1 under 0.5 A Zn-MnO2 212 5 Zn-NH4V4O10 obtained. This work may provide unique perspectives ZIBs cell components.

Language: Английский

---

Production of gas-releasing electrolyte-replenishing Ah-scale zinc metal pouch cells with aqueous gel electrolyte

Nature Communications, Journal Year: 2023, Volume and Issue: 14(1)

Published: July 14, 2023

Abstract Aqueous zinc batteries are ideal candidates for grid-scale energy storage because of their safety and low-cost aspects. However, the production large-format aqueous Zn is hindered by electrolyte consumption, hydrogen gas evolution accumulation, dendrites growth. To circumvent these issues, here we propose an “open” pouch cell design batteries, which can release allow refilling components consumed during cycling. The uses a gel containing crosslinked kappa (k)-carrageenan chitosan. It bonds water molecules hinders side reaction with Zn, preventing leakage fast evaporation. As proof-of-concept, report assembly testing | |Zn x V 2 O 5 ·nH multi-layer using carrageenan/chitosan electrolyte, delivers initial discharge capacity 0.9 Ah 84% retention after 200 cycles at mA g ‒1 , 370 kPa 25 °C.

Language: Английский

---

Fluoride-Rich, Organic–Inorganic Gradient Interphase Enabled by Sacrificial Solvation Shells for Reversible Zinc Metal Batteries

Journal of the American Chemical Society, Journal Year: 2023, Volume and Issue: 145(41), P. 22456 - 22465

Published: Oct. 6, 2023

Zinc metal batteries are strongly hindered by water corrosion, as solvated zinc ions would bring the active molecules to electrode/electrolyte interface constantly. Herein, we report a sacrificial solvation shell repel from and assist in forming fluoride-rich, organic-inorganic gradient solid electrolyte (SEI) layer. The simultaneous process of methanol Zn(CF3SO3)2 results SEI layer with an organic-rich surface (CH2OC- C5 product) inorganic-rich (ZnF2) bottom, which combines merits fast ion diffusion high flexibility. As result, additive enables corrosion-free stripping/plating on copper foils for 300 cycles average coulombic efficiency 99.5%, record cumulative plating capacity 10 A h/cm2 at 40 mA/cm2 Zn/Zn symmetrical batteries. More importantly, ultralow N/P ratio 2, practical VO2//20 μm thick Zn plate full areal 4.7 mAh/cm2 stably operate over 250 cycles, establishing their promising application grid-scale energy storage devices. Furthermore, directly utilizing 20 commercial-level (4.7 mAh/cm2) battery our work simplify manufacturing boost development commercial stationary storage.

Language: Английский

---

Carboxymethyl Chitosan‐Modified Zinc Anode for High‐Performance Zinc–Iodine Battery with Narrow Operating Voltage

Small Structures, Journal Year: 2023, Volume and Issue: 4(9)

Published: May 1, 2023

Reasonable regulation of iodine redox has gradually shown potential as a desirable cathodic reaction in zinc‐based batteries, but suffers from poor cyclic reversibility caused by uncontrollable side reactions. Also, the irregular growth dendrites and unavoidable occurrences hydrogen evolution H 2 O‐rich environment have become permanent topics anodic zinc. Herein, cross‐linked gel based on carboxymethyl chitosan is proposed serves an artificial electrolyte interphase for zinc anode (marked Zn‐CMCS). Such coating formed crosslinking among monodentate carboxyl group, hydroxyl, amino, Zn 2+ adding solution closely adheres surface foil with toughness, ductility, ideal electrochemical kinetics. Additionally, its homogenized charge distribution provides “flexible” substrate plating/stripping, resulting flat real‐time interface. While introducing I − /I 0 conversion matching adsorptive activated carbon fiber cloth (AC‐CFC) cathode, internal space restricted CMCS enables assembled Zn‐CMCS/AC‐CFC battery to exhibit greatly improved under long‐cycling condition within 28 000 cycles (measured more than years) narrow operating voltage range 0.23 V.

Language: Английский

---

Low‐cost and Non‐flammable Eutectic Electrolytes for Advanced Zn‐I₂ Batteries

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 62(39)

Published: Aug. 7, 2023

As a burgeoning electrolyte system, eutectic electrolytes based on ZnCl2 /Zn(CF3 SO3 )2 /Zn(TFSI)2 have been widely proposed in advanced Zn-I2 batteries; however, safety and cost concerns significantly limit their applications. Here, we report new-type ZnSO4 -based that are both safe cost-effective. Their universality is evident various solvents of polyhydric alcohols, which multiple -OH groups not only involve Zn2+ solvation but also interact with water, resulting the high stability electrolytes. Taking propylene glycol-based hydrated as an example, it features significant advantages non-flammability low price <1/200 Zn(CF3 Moreover, its effectiveness confining shuttle effects I2 cathode side reactions Zn anodes evidenced, cells reversibility at 1 C 91.4 % capacity remaining under 20 C. After scaling up to pouch cell record mass loading 33.3 mg cm-2 , super-high-capacity retention 96.7 achieved after 500 cycles, exceeds other aqueous counterparts. This work broadens family for battery design.

Language: Английский

---

Comprehensive Review of Electrolyte Modification Strategies for Stabilizing Zn Metal Anodes

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 33(51)

Published: Aug. 24, 2023

Abstract In response to the need of sustainable development, there is an increasing demand for electrical energy storage, leading a stimulated pursuit advanced batteries. Aqueous zinc ion batteries (AZIBs) have attracted much attention due their low cost, high safety, and environmental friendliness. Despite great efforts made by researchers in designing developing high‐performance AZIBs, several challenges remain. Particularly Zn anode, growth dendrites occurance various side reactions significantly hinder advancement AZIBs. This review article aims discuss principles electrolyte's structure properties, faced AZIBs anodesm strategies improve battery performance through electrolyte modification systematic manner. conclusion, potential future directions aimed at enhancing stability anodes cathodes are proposed ensure that research geared toward achieving realistic targets commercializing

Language: Английский

---

A Double‐Charged Organic Molecule Additive to Customize Electric Double Layer for Super‐Stable and Deep‐Rechargeable Zn Metal Pouch Batteries

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 34(8)

Published: Nov. 12, 2023

Abstract The electrochemical performance of aqueous zinc metal batteries (AZMBs) is highly dependent on the electric double layer (EDL) properties at Zn electrode/electrolyte interface. Herein, a novel reconfigured EDL constructed via double‐charged theanine (TN) additive for super‐stable and deep‐rechargeable AZMBs. Experiments theoretical computations unravel that positively charged TN not only serves as preferential anchor to form water‐poor Helmholtz plane onto anode, but also its anionic end could coordinate with 2+ tailor solvation structure in diffusion further reconstruct inner H‐bonds networks, thus effectively guiding uniform deposition suppressing water‐induced side reactions. Consequently, Zn//Zn cells acquire outstanding cycling stabilities nearly 800 h high depth discharge 80%. Moreover, Zn//VOX full deliver substantial capacity retention (94.12% after 1400 cycles 2 A g −1 ) under practical conditions. Importantly, designed 2.7 Ah pouch cell harvests recorded energy density 42.3 Wh Kg 79.5 L –1 , remarkable 85.93% 220 50 mA . This innovative design concept reshape chemistry would inject fresh vitality into developing advanced AZMBs beyond.

Language: Английский

---

Preferred planar crystal growth and uniform solid electrolyte interfaces enabled by anion receptors for stable aqueous Zn batteries

Energy & Environmental Science, Journal Year: 2023, Volume and Issue: 16(10), P. 4572 - 4583

Published: Jan. 1, 2023

The conventional H 2 O network is linked by hydrogen bonds. After adding IU molecules, the bond broken strong interaction between and water.

Language: Английский

---