Functional Inorganic Materials and Devices
- Longlong Li
Longlong Li
State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei 230027, China
More by Longlong Li
- Mingyuan Yan
Mingyuan Yan
State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei 230027, China
More by Mingyuan Yan
- Zun Zhao
Zun Zhao
State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei 230027, China
More by Zun Zhao
- Yueyue Xiao
Yueyue Xiao
State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei 230027, China
More by Yueyue Xiao
- Huiying Sun
Huiying Sun
State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei 230027, China
More by Huiying Sun
- Hui Yang
Hui Yang
State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei 230027, China
- Xudong Cheng
Xudong Cheng
State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei 230027, China
More by Xudong Cheng
- Yuelei Pan*
Yuelei Pan
State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei 230027, China
*Email: [emailprotected]
More by Yuelei Pan
- Heping Zhang*
Heping Zhang
State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei 230027, China
*Email: [emailprotected]
More by Heping Zhang
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ACS Applied Materials & Interfaces
Cite this: ACS Appl. Mater. Interfaces 2025, XXXX, XXX, XXX-XXX
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https://pubs.acs.org/doi/10.1021/acsami.5c02783
Published April 23, 2025
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Ambient pressure drying (APD) is an effective method for producing Al2O3–SiO2 aerogels for thermal insulation, with hydrophobic modification crucial for APD success. However, challenges persist in combining thermal insulation with mechanical strength due to the hindrance of doping Al on hydrophobic modification and the inherent brittleness of pure aerogels. We present an in situ hierarchical polymerization strategy, where the subsequently formed Si–O–Si network protects the preferentially polymerized Al–O–Al network, enabling successful hydrophobic modification and APD. Mullite fibers are incorporated to create a load-bearing framework, surrounded by a 3D aerogel matrix formed from nanoparticle aggregates. The nano aerogel serves as the load-bearing unit and creates compartments to suppress thermal diffusion. The resulting mullite fiber-reinforced Al2O3–SiO2 aerogel composites (MF/ASAs) demonstrate high compressive strength (0.41 MPa at 10% strain), excellent fatigue resistance (2.39% plastic deformation after 1000 cycles), and superior thermal properties (thermal conductivity: 0.034 W·m–1·K–1 at 25 °C and 0.081 W·m–1·K–1 at 1000 °C). A 2 mm-thick MF/ASA effectively blocked thermal runaway in lithium battery modules, with a 526 °C maximum cell-to-cell temperature gap. This approach enables cost-effective, scalable applications of Al2O3–SiO2 aerogels in high-temperature fields.
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© 2025 American Chemical Society
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Article subjects are automatically applied from the ACS Subject Taxonomy and describe the scientific concepts and themes of the article.
- Aerogels
- Batteries
- Composites
- Fibers
- Heat transfer
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ACS Applied Materials & Interfaces
Cite this: ACS Appl. Mater. Interfaces 2025, XXXX, XXX, XXX-XXX
Click to copy citationCitation copied!
Published April 23, 2025
Publication History
Received
Accepted
Revised
Published
online
© 2025 American Chemical Society
Request reuse permissions
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