Multifunctional Cellulose Nanocrystals Electrolyte Additive Enable Ultrahigh‐Rate and Dendrite‐Free Zn Anodes for Rechargeable Aqueous Zinc Batteries

Angewandte Chemie, Journal Year: 2024, Volume and Issue: 136(14)

Published: Feb. 2, 2024

Abstract The design of aqueous zinc (Zn) chemistry energy storage with high rate‐capability and long serving life is a great challenge due to its inhospitable coordination environment dismal interfacial chemistry. To bridge this big gap, herein, we build highly reversible Zn battery by taking advantages the biomass‐derived cellulose nanocrystals (CNCs) electrolyte additive unique physical chemical characteristics simultaneously. CNCs not only serves as fast ion carriers for enhancing 2+ transport kinetics but regulates interface form dynamic self‐repairing protective interphase, resulting in building ultra‐stable anodes under extreme conditions. As result, engineered system achieves superior average coulombic efficiency 97.27 % 140 mA cm −2 , steady charge–discharge 982 h 50 mAh which proposes universal pathway green, sustainable, large‐scale applications.

Language: Английский

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Balanced Mass Transfer and Active Sites Density in Hierarchical Porous Catalytic Metal–Organic Framework for Enhancing Redox Reaction in Lithium–Sulfur Batteries

ACS Nano, Journal Year: 2024, Volume and Issue: 18(20), P. 12820 - 12829

Published: May 9, 2024

Developing highly efficient catalysts, characterized by controllable pore architecture and effective utilization of active sites, is paramount in addressing the shuttle effect sluggish redox kinetics lithium polysulfides (LiPSs) lithium–sulfur batteries (LSBs), which, however, remains a formidable challenge. In this study, hierarchical porous catalytic metal–organic framework (HPC-MOF) with both appropriate porosity abundant exposed sites achieved through time-controlled precise engineering. It revealed that evolution structure site density time-dependent during etching processes. The moderately etched HPC-MOF-M attains heterogeneous pores at various scales, where large apertures ensure fast mass transfer micropores inherit high-density enhancing internal sites. Capitalizing on these advantages, LSB incorporating interlayer demonstrates 164.6% improvement discharge capability an 83.3% lower decay rate over long-term cycling 1.0C. Even under high sulfur loading 7.1 mg cm–2 lean electrolyte conditions, exhibits stable for 100 cycles. This work highlights significance balancing relationship between chemical regulation MOFs, which are anticipated to inspire development advanced catalysts LSBs.

Language: Английский

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Sieving‐type Electric Double Layer with Hydrogen Bond Interlocking to Stable Zinc Metal Anode

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(47)

Published: Aug. 15, 2024

Abstract The stability of aqueous zinc metal batteries is significantly affected by side reactions and dendrite growth on the anode interface, which primarily originate from water anions. Herein, we introduce a multi H‐bond site additive, 2, 2′‐Sulfonyldiethanol (SDE), into an electrolyte to construct sieving‐type electric double layer (EDL) hydrogen bond interlock in order address these issues. On one hand, SDE replaces H 2 O SO 4 2− anions that are adsorbed surface, expelling O/SO EDL thereby reducing content at interface. other when Zn 2+ de‐solvated interface during plating, strong interaction between can trap EDL, further decreasing their This effectively sieves them out inhibits reactions. Moreover, unique characteristics trapped restrict diffusion, enhancing transference number promoting dendrite‐free deposition Zn. Consequently, utilizing SDE/ZnSO enables excellent cycling Zn//Zn symmetrical cells Zn//MnO full with lifespans exceeding 3500 h 2500 cycles respectively.

Language: Английский

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Electrolyte Solvation Chemistry for Stabilizing the Zn Anode via Functionalized Organic Agents

Small, Journal Year: 2024, Volume and Issue: 20(28)

Published: Feb. 13, 2024

Abstract As a potential candidate for grid‐scale energy storage technology, aqueous Zn‐ion batteries (ZIBs) have attracted considerable attention due to their intrinsic safety, environmental friendliness, and ease of fabrication. Nevertheless, the road industry this technique is hindered by serious issues, including undesired side reactions, random growth Zn dendrites, electrode passivation, anode corrosion, which are associated with high reactivity water molecules during electrochemical reactions. These challenges strongly dependent on electrolyte solvation chemistry (ESC), subsequently determines behavior metal ions surface. In work, comprehensive understanding optimized ESC specified functional groups mixing agents stabilize provided. First, facing ZIBs chemical principles outlined. Specific paid working different groups. Then recent progress summarized compared. Finally, perspectives future research presented from point view.

Language: Английский

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Nicotinic acid additive with a double regulating mechanism for high-performance aqueous zinc ion batteries

Journal of Materials Chemistry A, Journal Year: 2024, Volume and Issue: 12(11), P. 6376 - 6386

Published: Jan. 1, 2024

Trace nicotinic acid (NA) can not only change the solvation structure of Zn 2+ , but also preferentially adsorbs on anode to reduce side reactions and inhibit dendrites. Zn‖Zn cells with NA operate for 5200 h at 1 mA cm −2 .

Language: Английский

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