Chemical Engineering Journal, Год журнала: 2025, Номер unknown, С. 162454 - 162454
Опубликована: Апрель 1, 2025
Язык: Английский
Advanced Materials, Год журнала: 2024, Номер unknown
Опубликована: Июль 10, 2024
Abstract Supramolecular hydrogels are typically assembled through weak non‐covalent interactions, posing a significant challenge in achieving ultra strength. Developing higher strength based on molecular/nanoscale engineering concepts is potential improvement strategy. Herein, super‐tough supramolecular hydrogel by gradually diffusing lignosulfonate sodium (LS) into polyvinyl alcohol (PVA) solution. Both simulations and analytical results indicate that the assembly subsequent enhancement of crosslinked network primarily attributed to LS‐induced formation gradual densification strong crystalline domains within hydrogel. The optimized exhibits impressive mechanical properties with tensile ≈20 MPa, Young's modulus ≈14 toughness ≈50 MJ m⁻ 3 , making it strongest lignin‐PVA/polymer known so far. Moreover, LS provides excellent low‐temperature stability (<‐60 °C), antibacterial, UV‐blocking capability (≈100%). Interestingly, diffusion ability demonstrated for self‐restructuring damaged hydrogel, 3D patterning surfaces, enhancing local freeze‐thaw PVA goal foster versatile platform combining eco‐friendly biocompatible PVA, paving way innovation interdisciplinarity biomedicine, materials, forestry science.
Язык: Английский
Процитировано
24
Advanced Materials, Год журнала: 2024, Номер unknown
Опубликована: Ноя. 14, 2024
Abstract Quasi‐solid‐state aqueous zinc ion batteries suffer from anodic dendrite growth during plating/stripping processes, impeding their commercial application. The inhibition of dendrites by high‐modulus electrolytes has been proven to be effective. However, hydrogel are difficult achieve high modulus owing inherent water contents. This work reports a electrolyte with ultrahigh that can overcome the stress through mechanical suppression effect. By combining wet‐annealing, solvent‐exchange, and salting‐out processes tuning hydrophobic crystalline domains, is obtained substantial content (≈70%), (198.5 MPa), toughness (274.3 MJ m −3 ), zinc‐ion conductivity (28.9 mS cm −1 which significantly outperforms previously reported poly(vinyl alcohol)‐based hydrogels. As result, exhibits excellent dendrite‐suppression effect achieves stable performance in Zn||Zn symmetric (1800 h cycle life at 1 mA −2 ). Moreover, Zn||V 2 O 5 pouch display cycling operate stably even under extreme conditions, such as large bending angle (180°) automotive crushing. provides promising approach for designing mechanically reliable advanced batteries.
Язык: Английский
Процитировано
24
Chem, Год журнала: 2025, Номер unknown, С. 102411 - 102411
Опубликована: Фев. 1, 2025
Язык: Английский
Процитировано
3
Energy & Environmental Science, Год журнала: 2024, Номер unknown
Опубликована: Янв. 1, 2024
The unique electron/ion dual regulation mechanism is established in the well-designed hydrogel electrolyte by integrating polyacrylamide network and carboxylated multi-walled carbon nanotubes for high performance flexible ZIBs.
Язык: Английский
Процитировано
12
Small, Год журнала: 2025, Номер unknown
Опубликована: Янв. 26, 2025
Abstract Separators are critical components of zinc‐metal batteries (ZMBs). Despite their high ionic conductivity and excellent electrolyte retention, the widely used glass fiber (GF) membranes suffer from poor mechanical stability cannot suppress dendrite growth, leading to rapid battery failure. Contrarily, polymer‐based separators offer superior strength facilitate more homogeneous zinc (Zn) deposition. However, they typically sluggish ion transport kinetics wettability by aqueous electrolytes, resulting in unsatisfactory electrochemical performance. Here a dehydroxylation strategy is proposed overcome above‐mentioned limitations for polyvinyl alcohol (PVA) separators. A dehydroxylated PVA‐based membrane (DHPVA) synthesized at relatively low temperature highly concentrated alkaline solution. Part hydroxyl groups removed and, as result, hydrogen bonding between PVA chains, which deemed responsible kinetics, minimized. At 20 °C, DHPVA reaches 12.5 mS cm −1 , almost 4 times higher than that PVA. Additionally, effectively promotes uniform Zn deposition, significantly extended cycle life reduced polarization, both a/symmetric (Cu/Zn Zn/Zn) full cells (Zn/NaV 3 O 8 ). This study provides new, effective, yet simple approach improve performance ZMBs.
Язык: Английский
Процитировано
1
Advanced Materials, Год журнала: 2025, Номер unknown
Опубликована: Фев. 25, 2025
Aqueous Zn-ion batteries (ZIBs) have experienced substantial advancements recently, while the aqueous electrolytes exhibit limited thermal adaptability. The low-cost Zn(BF4)2 salt possesses potential low-temperature application, brings unsatisfied stability of Zn anodes. To address this challenge, an ionic liquid based eutectic electrolyte (ILEE) utilizing presenting remarkable across a temperature range ≈-100-150 °C is developed, enabling ZIBs to operate in diverse conditions. inner Zn2+ solvation structure can be modulated BF4 --rich state within ILEE system, forming static ZnF₂ layer at electrolyte-Zn anode interface, as evidenced by ab initial molecular dynamic simulations. Moreover, positively charged EMIM+ accumulate on anodes form secondary electrostatic shield that mitigates uncontrollable dendrites growth, enhancing overall cycling life over 10 times compared with pure system. When electrolyte, PANI||Zn full cells demonstrate acceptable performances under all-temperature environments, especially long 9500 cycles low -40 and 500 high 60 °C. This special holds significant promise for future extreme environment.
Язык: Английский
Процитировано
1
Advanced Functional Materials, Год журнала: 2025, Номер unknown
Опубликована: Март 27, 2025
Abstract Hydrogel electrolytes are favored for flexible zinc‐ion batteries (FZIBs) due to their biocompatibility. Their application progress, however, is severely restricted by the poor water retention and low Zn 2+ transference number (t ). Herein, one composite polymer electrolyte (CPE) prepared introducing Prussian blues (PBs) as multifunctional fillers in polyvinyl alcohol (PVA) matrix enhance t . Experimental theoretical characterizations confirm that PB filler can alter migration mechanism trap of CPE. PBs active provide extra zinc ions unique 3D ion diffusion channels. Moreover, metal centers framework function Lewis acid sites have good affinity with anions salt, facilitating dissociation salt. Additionally, absorb coordination water, enhancing anti‐dehydration capability ionic conductivity hydrogel electrolytes. Consequently, P‐15/Zn‐15 shows high 16.3 mS cm⁻ 1 0.63. The Zn||Zn symmetric cells stably operate 600 h at 50 °C. Zn||P‐15/Zn‐15|| NaV 3 O 8 ·1.5H 2 full cell exhibits excellent cycling performance cycles.
Язык: Английский
Процитировано
1
Science China Materials, Год журнала: 2024, Номер 67(9), С. 2898 - 2907
Опубликована: Июль 16, 2024
Язык: Английский
Процитировано
7
Advanced Functional Materials, Год журнала: 2025, Номер unknown
Опубликована: Март 5, 2025
Abstract Aqueous zinc ion batteries (ZIBs) have been recognized as highly promising energy storage systems due to their high safety, low cost, and environmental benignity. However, voltage platform of cathode, coupled with uneven Zn deposition, side reactions, limited operational temperature range caused by free water molecules, has hampered the practical application ZIBs. To address these issues, 1‐ethyl‐3‐methylimidazolium acetate (EmimAc) ionic liquid (IL) is utilized modify active in polyvinyl alcohol (PVA)‐based hydrogel electrolyte. The abundant hydroxyl groups on PVA chains, along strong interactions between IL H 2 O, disrupt hydrogen bonds molecules. This electrolyte alleviates improves low‐temperature performance through suppressing crystallization lowering freezing point Furthermore, binding 2+ restricts migration, ensuring de‐intercalation Na + at 3 V (PO 4 ) (NVP) thereby maintaining a plateau (1.48 V) for improved density. Benefitting from merits, pouch cell Zn||NVP achieves 100 cycles 25 °C, coin 81.3% capacity retention after 1600 −20 °C. work represents significant advance designing expanded voltage/temperature electrolytes
Язык: Английский
Процитировано
1
Matter, Год журнала: 2024, Номер unknown
Опубликована: Окт. 1, 2024
Язык: Английский
Процитировано
5