| Autor: |
Mengke Peng, Longbin Li, Li Wang, Xiannong Tang, Kang Xiao, Xuejiao J. Gao, Ting Hu, Kai Yuan, Yiwang Chen |
| Jazyk: |
angličtina |
| Rok vydání: |
2024 |
| Předmět: |
|
| Zdroj: |
Fundamental Research, Vol 4, Iss 6, Pp 1488-1497 (2024) |
| Druh dokumentu: |
article |
| ISSN: |
2667-3258 |
| DOI: |
10.1016/j.fmre.2023.02.018 |
| Popis: |
Manufacturing cost-effective electrolytes featuring high (electro)chemical stability, high Zn anode reversibility, good ionic conductivity, and environmental benignity is highly desired for rechargeable aqueous zinc-based energy storage devices but remains a great challenge. Herein, a solute-solvent dual engineering strategy using lithium bis(trifluoromethane)sulfonimide (LiTFSI) and inexpensive poly(ethylene glycol) (PEG, Mn = 200) as a coadditive with an optimized ratio accomplished an all-round performance enhancement of electrolytes. Due to the synergistic inhibition of water activity and Zn2+ solvation structure reorganization by LiTFSI-PEG, as well as a stable F-rich interfacial layer and PEG adsorption on the Zn anode surface, dendrite-free Zn plating/stripping at nearly 100% Coulombic efficiency and stable cycling performance over 2000 h at 0.5 mA cm−2 was achieved. Importantly, the integrated Zn-ion hybrid supercapacitors are endowed with a wide voltage window of 0–2.2 V, superb cycling stability up to 10,000 cycles, and excellent temperature adaptability from -40 °C to 50 °C. The highest cutoff voltage reached 2.1 V in Zn//LiMn2O4 and Zn//VOPO4 full cells with a stable lifespan over 500 cycles. This work provides a promising strategy for the development of aqueous electrolytes with excellent comprehensive properties for zinc-based energy storage. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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