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Anisotropic MXene Aerogels with a Mechanically Tunable Ratio of Electromagnetic Wave Reflection to Absorption
Abstract
Lightweight and mechanically flexible materials that can provide efficient electromagnetic interference (EMI) shielding are highly desirable for protecting portable and smart electronic devices against electromagnetic pollution. Here, the authors report a tunable design of a three‐dimensional (3D) porous aerogel structure made of 2D transition metal carbides and a carbonitride (MXene) with a long‐range order of aligned lamellar architecture for EMI shielding. Bidirectional freeze‐casting of MXene colloidal solutions is used to fabricate robust, compressible and lightweight aerogels, and achieve orientational assembly leading to outstanding EMI shielding performance and tunable ratio of reflection to absorption. EMI shielding effectiveness (SE) of three types of MXene aerogels (Ti 3 C 2 T x, Ti 2 CT x, and Ti 3 CNT x) reaches 70.5, 69.2, and 54.1 dB, respectively, while keeping the compression thickness at 1 mm and a density of only ≈11.0 mg cm−3. The highest specific SE reaches 8818.2 dB cm 3 g−1, which is among the best values reported for EMI shielding materials. More importantly, during the compression process of the MXene aerogels, the ratio of electromagnetic wave reflection to absorption increases without noticeable change of the total EMI SE. Compressible MXene aerogels with aligned layers offer an effective approach to control the electromagnetic wave absorption and reflection in EMI shielding materials.
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Citations
Cited by
Electromagnetic microwave absorption theory and recent achievements in microwave absorbers
Zeng, X., Cheng, X., Yu, R., & Stucky, G. D. (2020) · Carbon · doi:10.1016/j.carbon.2020.07.028 · Cited by 991
Shao, G., Hanaor, D. A. H., Shen, X., & Gurlo, A. (2020) · Advanced Materials · doi:10.1002/adma.201907176 · Cited by 871
Deysher, G., Shuck, C. E., Hantanasirisakul, K., Frey, N. C., Foucher, A. C., Maleski, K., Sarycheva, A., Shenoy, V. B., Stach, E. A., Anasori, B., et al. (2020) · ACS Nano · doi:10.1021/acsnano.9b07708 · Cited by 720
Self-citationLiu, L., Chen, W., Zhang, H., Wang, Q., Guan, F., & Yu, Z. (2019) · Advanced Functional Materials · doi:10.1002/adfm.201905197 · Cited by 699
Wang, L., Zhang, M., Yang, B., Tan, J., & Ding, X. (2020) · ACS Nano · doi:10.1021/acsnano.0c04888 · Cited by 409
Metadata
- Authors
- Han, M., Yin, X., Hantanasirisakul, K., Li, X., Iqbal, A., Hatter, C. B., Anasori, B., Koo, C. M., Torita, T., Soda, Y., Zhang, L., Cheng, L., & Gogotsi, Y.
- Venue
- Advanced Optical Materials
- Publisher
- Wiley
- Published
- 2019-03-25
- Volume
- 7
- Issue
- 10
- ISSN
- 2195-1071 (ISSN-L)
- OpenAlex
- W2945138038
- Cited by
- 342
- References
- 0
- FWCI
- 13.09
- Type
- journal article
- Language
- en
- Open access
- closed
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- Han, M., Yin, X., Hantanasirisakul, K., Li, X., Iqbal, A., Hatter, C. B., Anasori, B., Koo, C. M., Torita, T., Soda, Y., Zhang, L., Cheng, L., & Gogotsi, Y. (2019). Anisotropic MXene Aerogels with a Mechanically Tunable Ratio of Electromagnetic Wave Reflection to Absorption. Advanced Optical Materials. https://doi.org/10.1002/adom.201900267
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