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Flexible and high-performance electrochromic devices enabled by self-assembled 2D TiO2/MXene heterostructures

Journal Article · · Nature Communications
 [1];  [2];  [3];  [2];  [4];  [4];  [3];  [3];  [3];  [3];  [3];  [3];  [5];  [5];  [3];  [6]
  1. Donghua Univ., Shanghai (China). College of Materials Science and Engineering. State Key Lab. for Modification of Chemical Fibers and Polymer Materials; Boston Univ., MA (United States). Dept. of Chemistry; OSTI
  2. Boston Univ., MA (United States). Dept. of Chemistry
  3. Donghua Univ., Shanghai (China). College of Materials Science and Engineering. State Key Lab. for Modification of Chemical Fibers and Polymer Materials
  4. Boston Univ., MA (United States). Division of Materials Science and Engineering
  5. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States). Dept. of Electrical Engineering and Computer Science
  6. Boston Univ., MA (United States). Dept. of Chemistry; Boston Univ., MA (United States). Division of Materials Science and Engineering; Boston Univ., MA (United States). The Photonics Center

Transition metal oxides (TMOs) are promising electrochromic (EC) materials for applications such as smart windows and displays, yet the challenge still exists to achieve good flexibility, high coloration efficiency and fast response simultaneously. MXenes (e.g. Ti3C2Tx) and their derived TMOs (e.g. 2D TiO2) are good candidates for high-performance and flexible EC devices because of their 2D nature and the possibility of assembling them into loosely networked structures. Here we demonstrate flexible, fast, and high-coloration-efficiency EC devices based on self-assembled 2D TiO2/Ti3C2Tx heterostructures, with the Ti3C2Tx layer as the transparent electrode, and the 2D TiO2layer as the EC layer. Benefiting from the well-balanced porosity and connectivity of these assembled nanometer-thick heterostructures, they present fast and efficient ion and electron transport, as well as superior mechanical and electrochemical stability. We further demonstrate large-area flexible devices which could potentially be integrated onto curved and flexible surfaces for future ubiquitous electronics.

Sponsoring Organization:
USDOE Office of Science (SC); National Natural Science Foundation of China (NSFC); Fundamental Research Funds for the Central Universities; Donghua University
Grant/Contract Number:
SC0021064
OSTI ID:
1817012
Journal Information:
Nature Communications, Journal Name: Nature Communications Journal Issue: 1 Vol. 12; ISSN 2041-1723
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English

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