Abstract
Separators in supercapacitors (SCs) typically suffer from defects of low mechanical property, limited ion transport, and electrolyte wettability, and poor thermal stability, impeding the development of SCs. Herein, high-performance regenerated cellulose (RC) based separators are designed that are fabricated by effective hydrolytic etching of inorganic CaCO3 nanoparticles from a filled RC membrane. The as-prepared RC separator displays excellent comprehensive performances such as higher tensile strength (75.83 MPa) and thermal stability (200 °C), which is superior to commercial polypropylene-based separator (Celgard 2500) and sufficient to maintain their structural integrity even at temperatures in excess of 200 °C. Benefiting from its hydrophilicity, high porosity, and outstanding electrolyte uptake rate (208.5%), the RC separator exhibits rapid transport and permeability of ions, which is 2.5× higher than that of the commercial nonwoven polypropylene separator (NKK -MPF30AC-100) validated by electrochemical tests in the 1.0 m Na2SO4 electrolyte. Results show that porous RC separator with unique advantages of superior electrolyte wettability, mechanical robustness, and high thermal stability, is a promising separator for SCs with high-performance and safety.
Original language | English (US) |
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Article number | 2205152 |
Journal | Small |
Volume | 19 |
Issue number | 1 |
DOIs | |
State | Published - Jan 4 2023 |
Bibliographical note
Funding Information:The authors gratefully acknowledge the financial support from National Natural Science Foundation of China (Grant No. 21701159).
Publisher Copyright:
© 2022 Wiley-VCH GmbH.
Keywords
- high performance
- regenerated cellulose
- separators
- supercapacitors
PubMed: MeSH publication types
- Journal Article
- Research Support, Non-U.S. Gov't