Journal
NANO LETTERS
Volume 20, Issue 10, Pages 7397-7404Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.nanolett.0c02721
Keywords
Composite polymer electrolytes; natural cellulose; ceramic particle networks; 3D continuous Li+ pathways; high Li+ conductivity; mechanical strength
Categories
Funding
- National Key RAMP
- D Program of China [2016YFA0201104]
- Fundamental Research Funds for the Central Universities [14380166, 14913413]
- Jiangsu Innovative and Entrepreneurial Talent Award
- State Key Laboratory of Analytical Chemistry for Life Science (SKLACLS)
- China Scholarship Council (CSC)
- Thousand Talents Program for Young Researchers
- National Natural Science Foundation of China [21601083]
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Solid polymer electrolytes for safe lithium batteries are in general flexible and easy to process, yet they have limited ionic conductivity and low mechanical strength. Introducing nano/microsized fillers into polymer electrolytes has been proven effective to address these issues, while formation of a percolated network of fillers for efficient Li+ conduction remains challenging. In this work, composite polymer electrolyte with 3D cellulose/ceramic networks is successfully developed using natural cellulose fibers and Li+-conducting ceramic nanoparticles. Monodisperse ceramic nanofillers first form interconnected networks driven by the self-assembly of hybrid cellulose fibers. The hierarchical cellulose skeleton provides spatial guidance for ceramic fillers and firmly supports the whole structure. After polymer electrolyte infusion, the resultant hybrid electrolyte affords both 3D continuous Li+ pathways for high Li+ conductivity and sufficient mechanical strength for dendrite suppression. This cellulose-confined particle percolation approach enables efficient and strong solid electrolytes for lithium batteries.
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