Aqueous Zinc‐Iodine Batteries: From Electrochemistry to Energy Storage Mechanism

Advanced Energy Materials, Год журнала: 2023, Номер 13(41)

Опубликована: Сен. 1, 2023

Abstract As one of the most appealing energy storage technologies, aqueous zinc‐iodine batteries still suffer severe problems such as low density, slow iodine conversion kinetics, and polyiodide shuttle. This review summarizes recent development Zn─I 2 with a focus on electrochemistry underlying working mechanism. Starting from fundamentals batteries, zinc anode, well scientific existing in are introduced. The concrete strategies dealing cathode, electrolyte, separator challenges confronting elaborated well. To deepen understanding important findings mechanism different summarized detail. Finally, some guidelines directions for also provided. is expected to battery promote their practical applications future.

Язык: Английский

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Trace Amounts of Triple-Functional Additives Enable Reversible Aqueous Zinc-Ion Batteries from a Comprehensive Perspective

Nano-Micro Letters, Год журнала: 2023, Номер 15(1)

Опубликована: Март 31, 2023

Although their cost-effectiveness and intrinsic safety, aqueous zinc-ion batteries suffer from notorious side reactions including hydrogen evolution reaction, Zn corrosion passivation, dendrite formation on the anode. Despite numerous strategies to alleviate these have been demonstrated, they can only provide limited performance improvement a single aspect. Herein, triple-functional additive with trace amounts, ammonium hydroxide, was demonstrated comprehensively protect zinc anodes. The results show that shift of electrolyte pH 4.1 5.2 lowers HER potential encourages in situ uniform ZHS-based solid interphase Moreover, cationic NH4+ preferentially adsorb anode surface shield "tip effect" homogenize electric field. Benefitting this comprehensive protection, dendrite-free deposition highly reversible plating/stripping behaviors were realized. Besides, improved electrochemical performances also be achieved Zn//MnO2 full cells by taking advantages additive. This work provides new strategy for stabilizing anodes perspective.

Язык: Английский

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In‐Situ Integration of a Hydrophobic and Fast‐Zn²⁺‐Conductive Inorganic Interphase to Stabilize Zn Metal Anodes

Angewandte Chemie International Edition, Год журнала: 2023, Номер 62(27)

Опубликована: Май 2, 2023

The irreversible issues of Zn anode stemming from dendrite growth and water-induced erosion have severely hindered the commercialization rechargeable aqueous batteries. Herein, a hydrophobic fast-Zn2+ -conductive zinc hexacyanoferrate (HB-ZnHCF) interphase layer is in situ integrated on by rapid room-temperature wet-chemistry method to address these dilemmas. Different currently proposed hydrophilic inorganic cases, compact HB-ZnHCF effectively prevents access water molecules surface, thus avoiding H2 evolution corrosion. Moreover, with large internal ion channels, strong zincophilicity, high Zn2+ transference number (0.86) permits fast transport enables smooth deposition. Remarkably, resultant HB-ZnHCF@Zn electrode delivers unprecedented reversibility 99.88 % Coulombic efficiency over 3000 cycles, realizes long-term cycling 5800 h (>8 months, 1 mA cm-2 ) 1000 (10 ), assures stable operation full battery both coin- pouch-type configurations.

Язык: Английский

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Metallic Particles‐Induced Surface Reconstruction Enabling Highly Durable Zinc Metal Anode

Advanced Functional Materials, Год журнала: 2023, Номер 33(38)

Опубликована: Июнь 4, 2023

Abstract Aqueous zinc batteries usher in a renaissance due to their intrinsic security and cost effectiveness, bespeaking vast application foreground for large‐scale energy storage system. However, uncontrolled dendrite growth along with hydrogen evolution severely restricts its reversibility stability practical application. Herein, the surface of Zn metal is reconstructed metallic particles (In, Sn, In 0.2 Sn 0.8 ) diminish defects regulate deposition behavior. The alloyed In–Sn greatly activates lower adsorption barrier expedite plating kinetics confine aggregation. Dense uniform on significantly prevents substrate from dendrites catastrophic damage. Meanwhile, alloy layer embodies high overpotential, ensuring stripping efficiency anode. Consequently, realizes long‐term lifespan up 1800 h low polarization (12 mV) at condition 1 mA cm −2 mAh . When paired sodium vanadate (NVO) cathode, full cell steady operates high‐capacity retention 94.0% after 5000 cycles 5 A g −1 This study provides new insights into surface‐defects dependent process offers guide constructing stable dendrite‐free growth.

Язык: Английский

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Loosening Zinc Ions from Separator Boosts Stable Zn Plating/Striping Behavior for Aqueous Zinc Ion Batteries

Advanced Energy Materials, Год журнала: 2023, Номер 13(42)

Опубликована: Сен. 25, 2023

Abstract Aqueous zinc ion batteries are attracting broad interest in stationary energy storage where low cost, robust security, and satisfactory capacity matter most. However, metal anodes suffer from destructive dendrite issues during repeated charging/discharging process, decreasing the cycle life of batteries. Herein, smoother plating/striping behaviors achieved by group modification structural unit polymer separator. Experimental results theoretical simulations reveal that skeleton can release more easily when modified with carbonylation side groups contribute to much faster transfer capability. Typically, symmetric Zn cells a thin thickness separator 21 µm exhibit ultralong over 2800 h at 1 mA cm −2 within mAh 300 under high current density 5 areal 3 . Full using sodium vanadium oxide cathode also show stable reversible performance after 2000 cycles A g −1 This work is expected inspire promising strategies molecular design polymeric toward stabilizing beyond this anode itself.

Язык: Английский

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Hetero‐Polyionic Hydrogels Enable Dendrites‐Free Aqueous Zn‐I₂ Batteries with Fast Kinetics

Advanced Materials, Год журнала: 2023, Номер 35(44)

Опубликована: Авг. 23, 2023

Rechargeable aqueous Zn-I2 batteries (ZIB) are regarded as a promising energy storage candidate. However, soluble polyiodide shuttling and rampant Zn dendrite growth hamper its commercial implementation. Herein, hetero-polyionic hydrogel is designed the electrolyte for ZIBs. On cathode side, iodophilic polycationic (PCH) effectively alleviates shuttle effect facilitates redox kinetics of iodine species. Meanwhile, polyanionic (PAH) toward metal anode uniformizes Zn2+ flux prevents surface corrosion by electrostatic repulsion polyiodides. Consequently, symmetric cells with PAH demonstrate remarkable cycling stability over 3000 h at 1 mA cm-2 (1 mAh ) 800 10 (5 ). Moreover, full PAH-PCH deliver low-capacity decay 0.008 ‰ per cycle during 18 000 cycles 8 C. This work sheds light on electrolytes design long-life conversion-type batteries.

Язык: Английский

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Dielectric–Metallic Double-Gradient Composition Design for Stable Zn Metal Anodes

ACS Energy Letters, Год журнала: 2023, Номер 8(4), С. 2042 - 2050

Опубликована: Апрель 4, 2023

The commercial implementation of aqueous Zn-ion batteries is being impeded by the rampant dendrite growth and exacerbated side reactions on Zn metal anodes. Herein, a 60 nm artificial protective layer with spatial dielectric–metallic gradient composition (denoted as GZH) developed via HfO2 cosputtering. In this design, top high permittivity low electronic conductivity effectively suppresses hydrogen evolution. intermediate Zn-rich oxide region promotes dendrite-free deposition reinforces contact between sputtered layer. This design allows stable battery operation at currents. Symmetric cells Zn-GZH exhibit voltage separation over 500 h 10 mA cm–2 cutoff capacity 5 mAh cm–2. When paired vanadate cathode, full-cell delivers retention around 75% after 2000 cycles. concept may apply to other batteries.

Язык: Английский

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Toward Forty Thousand‐Cycle Aqueous Zinc‐Iodine Battery: Simultaneously Inhibiting Polyiodides Shuttle and Stabilizing Zinc Anode through a Suspension Electrolyte

Advanced Functional Materials, Год журнала: 2023, Номер 33(28)

Опубликована: Апрель 22, 2023

Abstract Aqueous zinc‐iodine (Zn‐I 2 ) batteries are promising candidates for grid‐scale energy storage due to their safety and cost‐effectiveness. However, the shuttle effect of polyiodides, Zn corrosion, accumulation by‐products restrict applications. Herein, a simple vermiculite nanosheets (VS) suspension electrolyte is designed simultaneous confinement polyiodides stabilization anode. It found that generation I 5 − as dominant intermediate precipitation reaction between alkaline should cause irreversible iodine species loss. Benefiting from high binding silica‐oxygen bonds VS, dissolved effectively anchored on surface VS suspended in bulk suppress effect, which confirmed by situ Raman, Ultraviolet‐visible characterizations theoretical calculations. Furthermore, self‐assembly interfacial layer anode hinders side reactions induced polyiodides. Meanwhile, interlayer excess negative charges tend be compensated 2+ diffuse layer, serves ion accelerators transferring at interface immediately, rendering dendrite‐free plating/stripping behavior. Consequently, Zn‐I battery with achieves an ultra‐long lifespan 40000 cycles negligible capacity decay 20 C.

Язык: Английский

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Comprehensive insights into solid-state electrolytes and electrode-electrolyte interfaces in all-solid-state sodium-ion batteries

Energy storage materials, Год журнала: 2023, Номер 60, С. 102821 - 102821

Опубликована: Май 21, 2023

Язык: Английский

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Metal–iodine batteries: achievements, challenges, and future

Energy & Environmental Science, Год журнала: 2023, Номер 16(11), С. 4872 - 4925

Опубликована: Янв. 1, 2023

This review details past attempts, breakthroughs, and computational/characterization methods in developing metal–iodine batteries along with their key innovations, deficiencies, possible solutions.

Язык: Английский

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