Regulating the Inner Helmholtz Plane with a High Donor Additive for Efficient Anode Reversibility in Aqueous Zn‐Ion Batteries

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 62(21)

Published: March 24, 2023

The performance of aqueous Zn ion batteries (AZIBs) is highly dependent on inner Helmholtz plane (IHP) chemistry. Notorious parasitic reactions containing hydrogen evolution (HER) and dendrites both originate from abundant free H2 O random deposition inside active IHP. Here, we report a universal high donor number (DN) additive pyridine (Py) with only 1 vol. % addition (Py-to-H2 volume ratio), for regulating molecule distribution Density functional theory (DFT) calculations molecular dynamics (MD) simulation verify that incorporated Py could tailor Zn2+ solvation sheath exclude molecules IHP effectively, which in favor preventing decomposition. Consequently, even at extreme conditions such as depth discharge (DOD) 80 %, the symmetric cell based can sustain approximately 500 h long-term stability. This efficient strategy DN additives furnishes promising direction designing novel electrolytes promoting practical application AZIBs, despite inevitably introducing trace organic additives.

Language: Английский

---

Achieving Stable Zinc Metal Anode Via Polyaniline Interface Regulation of Zn Ion Flux and Desolvation

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 34(5)

Published: Feb. 23, 2023

Abstract Aqueous zinc‐ion batteries feature high safety, low cost, and relatively energy density; however, their cycle life is hindered by severe Zn dendrite formation water‐induced parasitic reactions. Herein, a porous polyaniline (PANI) interfacial layer developed on the surface of metal anode to regulate transport deposition 2+ , achieving an ultra‐stable highly reversible anode. Specifically, abundant polar groups (NH N) in PANI have strong attraction H 2 O, which can trap immobilize O molecules around . Moreover, protective regulates ion flux behavior through confinement effect. Consequently, Zn@PANI exhibits improved plating/stripping with nucleation overpotential (37.9 mV) at 2.0 mA cm ‐2 compared that bare The MnO //Zn@PANI cell demonstrates capacity retention 94.3% after 1000 cycles 1.0 A g −1 This study lays foundation for accessible interface engineering in‐depth mechanistic analysis

Language: Английский

---

Self-assembled multilayers direct a buffer interphase for long-life aqueous zinc-ion batteries

Energy & Environmental Science, Journal Year: 2023, Volume and Issue: 16(8), P. 3381 - 3390

Published: Jan. 1, 2023

A self-assembled multilayer was used to homogenize ion flux and accelerate charge transfer through area-induced deposition effects strong dipole moments. The molecular domains act as a buffer interphase achieve long-term stability.

Language: Английский

---

Low‐Cost Multi‐Function Electrolyte Additive Enabling Highly Stable Interfacial Chemical Environment for Highly Reversible Aqueous Zinc Ion Batteries

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 33(49)

Published: Sept. 1, 2023

Abstract The practicality of aqueous zinc ion batteries (AZIBs) for large‐scale energy storage is hindered by challenges associated with anodes. In this study, a low‐cost and multi‐function electrolyte additive, cetyltrimethyl ammonium bromide (CTAB), presented to address these issues. CTAB adsorbs onto the anode surface, regulating Zn 2+ deposition orientation inhibiting dendrite formation. It also modifies solvation structure reduce water reactivity minimize side reactions. Additionally, optimizes key physicochemical parameters electrolyte, enhancing stability electrode/electrolyte interface promoting reversibility in AZIBs. Theoretical simulations combined operando synchrotron radiation‐based situ Fourier transform infrared spectra electrochemical impedance further confirm modified coordination environment adsorption effect cations at anode/electrolyte interface. As result, assembled Zn‐MnO 2 battery demonstrates remarkable specific capacity 126.56 mAh g −1 high current density 4 A after 1000 cycles. This work highlights potential as promising solution improving performance AZIBs applications.

Language: Английский

---

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

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

Published: March 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.

Language: Английский

---

Hybrid working mechanism enables highly reversible Zn electrodes

eScience, Journal Year: 2023, Volume and Issue: 3(2), P. 100096 - 100096

Published: Jan. 17, 2023

Zn dendrite growth and water-related side reactions have been criticized to hinder actual applications of aqueous Zn-ion batteries. To address these issues, a series interfacial modifications building solid/electrolyte interphase (SEI) nucleation layers widely proposed, however, their effectiveness remains debatable. Here, we report boron nitride (BN)/Nafion layer on the surface efficiently solve problems through combining hybrid working mechanisms SEI layers. In our protective layer, Nafion exhibits mechanism by blocking water from providing abundant channels for rapid Zn2+ transmission, whilst BN nanosheets induce deposition underneath with preferred (002) orientation. Accordingly, dendrite-free side-reaction-free electrode under is realized first time, as reflected its high reversibility average Coulombic efficiency 99.2% > 3000 ​h. The protected also shows excellent performance in full cells when coupling polyaniline cathode strict condition lean electrolyte addition. This work highlights insights designing highly reversible metal electrodes towards practical applications.

Language: Английский

---

Design Strategies toward High‐Performance Zn Metal Anode

Small Methods, Journal Year: 2023, Volume and Issue: 8(6)

Published: Feb. 25, 2023

Abstract Rechargeable aqueous Zn‐ion batteries (AZIBs) are one of the most promising alternatives for traditional energy‐storage devices because their low cost, abundant resources, environmental friendliness, and inherent safety. However, several detrimental issues with Zn metal anodes including dendrite formation, hydrogen evolution, corrosion passivation, should be considered when designing advanced AZIBs. Moreover, these thorny not independent but mutually reinforcing, covering many technical processing parameters. Therefore, it is necessary to comprehensively summarize facing corresponding strategies develop roadmaps development high‐performance anodes. Herein, failure mechanisms impacts outlined. Recent progress on improving stability anode summarized, structurally designed anodes, alloy surface modification, electrolyte optimization, separator design. Finally, this review provides brilliant insightful perspectives stable promotes large‐scale application AZIBs in power grid systems.

Language: Английский

---

Electric double layer design for Zn-based batteries

Energy storage materials, Journal Year: 2023, Volume and Issue: 62, P. 102932 - 102932

Published: Aug. 16, 2023

Language: Английский

---

Triple‐function Hydrated Eutectic Electrolyte for Enhanced Aqueous Zinc Batteries

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 62(40)

Published: Aug. 14, 2023

Aqueous rechargeable zinc-ion batteries (ARZBs) are impeded by the mutual problems of unstable cathode, electrolyte parasitic reactions, and dendritic growth zinc (Zn) anode. Herein, a triple-functional strategy introducing tetramethylene sulfone (TMS) to form hydrated eutectic is reported ameliorate these issues. The activity H2 O inhibited reconstructing hydrogen bonds due strong interaction between TMS O. Meanwhile, preferentially adsorbed on Zn surface increases thickness double electric layer (EDL) structure, which provides shielding buffer suppress dendrite growth. Interestingly, modulates primary solvation shell Zn2+ ultimately achieve novel solvent co-intercalation ((Zn-TMS)2+ ) mechanism, intercalated works as "pillar" that more zincophilic sites stabilizes structure cathode (NH4 V4 O10 , (NVO)). Consequently, Zn||NVO battery exhibits remarkably high specific capacity 515.6 mAh g-1 at low current density 0.2 A for over 40 days. This multi-functional electrolytes mechanism will significantly propel practical development aqueous batteries.

Language: Английский

---

Self‐Adapting and Self‐Healing Hydrogel Interface with Fast Zn²⁺ Transport Kinetics for Highly Reversible Zn Anodes

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 33(29)

Published: April 22, 2023

Abstract Construction of polymer‐based artificial solid‐electrolyte interphase films on Zn metal anode holds great potential in the suppression both dendrite growth and side reaction rechargeable aqueous Zn‐ion batteries. However, traditional polymer suffer from critical issues sluggish 2+ transport kinetics rigid interface. Herein, zinc alginate (ZA) hydrogel is designed prepared as a dynamic interface redistributor via situ cross‐linking reaction. The zincophilic negatively charged carboxyl groups ZA promote ions along “Z‐type” pathway, repulsion free SO 4 2‐ anions, desolvation ions, consequently leading to homogeneous deposition effective Additionally, flexibility endows with self‐adapting accommodate volume variation repair possible ruptures, thereby guaranteeing long‐term cycling stability. Assisted by layer, achieves prolonged lifespan over 2200 h without formation dendrites by‐products. Outstanding stability also demonstrated for when coupled MnO 2 cathode, further demonstrating its prospects practical application.

Language: Английский

---