Amorphous‐Crystalline Interface Induced Internal Electric Fields for Electrochromic Smart Window
Balancing optical modulation and response time is crucial for achieving high coloration efficiency in electrochromic materials. Here, internal electric fields are introduced to titanium dioxide nanosheets by constructing abundant amorphous-crystalline interfaces, ensuring large optical modulation while reducing response time and therefore improving coloration efficiency. Aberration-corrected high-angle annular dark-field scanning transmission electron microscopy (HAADF-STEM) reveals the presence of numerous amorphous-crystalline phase boundaries in titanium dioxide nanosheets. Kelvin probe force microscopy (KPFM) exhibits an intense surface potential distribution, demonstrating the presence of internal electric fields. Density functional theory (DFT) calculations confirm that the amorphous-crystalline heterointerfaces can generate internal electric fields and reduce diffusion barriers of lithium ions. As a result, the amorphous-crystalline titanium dioxide nanosheets exhibit better coloration efficiency (35.1 cm<sup>2</sup> C<sup>-1</sup>) than pure amorphous and crystalline titanium dioxide nanosheets.
Authors
- Xiaocheng Liu (ORCID: https://orcid.org/0000-0002-6151-7914)
- Pinyi Wang (ORCID: https://orcid.org/0000-0002-7253-0794)
- Zhang Shi (ORCID: https://orcid.org/0000-0001-8748-7955)
- Xusheng Zheng (ORCID: https://orcid.org/0000-0003-2559-6106)
- Xun Hong (ORCID: https://orcid.org/0000-0003-2784-2868)
- Geng Wu
- Si‐Zhe Sheng (ORCID: https://orcid.org/0000-0001-6253-6116)
- Jianwei Liu (ORCID: https://orcid.org/0000-0001-9237-1025)
- Han Xiao (ORCID: https://orcid.org/0000-0003-2895-1847)
- Jingjing Guo (ORCID: https://orcid.org/0009-0008-8408-9693)
- Hai Li (ORCID: https://orcid.org/0000-0002-9659-1153)
- Zixiang Huang
- Jiachuan He
Institutions
- University of Science and Technology of China (CN)
- Nanjing Tech University (CN)
- National Synchrotron Radiation Laboratory (CN)
- The Synergetic Innovation Center for Advanced Materials (CN)
Publication Details
- Journal
- Advanced Materials
- Published
- 2024-09-30
- DOI
- https://doi.org/10.1002/adma.202410355
- Citations
- 17
- Primary Topic
- Transition Metal Oxide Nanomaterials
- Type
- article
- Field-Weighted Citation Impact
- 2.87
Funders
- National Natural Science Foundation of China
- China Postdoctoral Science Foundation
- National Key Research and Development Program of China
- Fundamental Research Funds for the Central Universities