Journal
CHEMISTRY OF MATERIALS
Volume 24, Issue 17, Pages 3481-3485Publisher
AMER CHEMICAL SOC
DOI: 10.1021/cm301967f
Keywords
biomimetics; silica; surface modification; Li-ion battery
Funding
- World Class University [R-31-10055, R-31-10071]
- Secondary Battery Development Program [C1AAA001-2010-0029031]
- Molecular-level Interface Research Center by National Research Foundation of S. Korea [2012-0000909]
- National Research Foundation of Korea [R31-2012-000-10055-0, R31-2012-000-10071-0, 2009-0093117] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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In this study, we developed an integrative bioinspired approach that improves the power and safety of Li-ion batteries (LIBs) by the surface modification of polyethylene (PE) separators. The approach involves the synthesis of a diatom-inspired silica layer on the surface of the PE separator, and the adhesion of the silica layer was inspired by mussels. The mussel- and diatom-inspired silica coating increased the electrolyte wettability of the separator, resulting in enhanced power and improved thermal shrinkage, resulting safer LIBs. Furthermore, the overall processes are environmentally friendly and cost-effective. The process described herein is the first example of the use of diatom-inspired silica in practically important energy storage applications. The improved wetting and thermal properties are critical, particularly for large-scale battery applications.
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