Jump to main content
Jump to site search

Janus electrochemical exfoliation of two-dimensional materials

Author affiliations


Atomically thin two-dimensional (2D) materials have attracted increasing research interest due to their fascinating properties as well as multifarious potential applications. Despite tremendous achievements, the fundamental challenge in this rapidly growing field is fabricating these 2D materials with a well-controlled structure in an effective and scalable way. Electrochemical exfoliation, where bulk crystals can be electrochemically positively/negatively charged using intercalators, is an ingenious strategy to prepare high-quality 2D materials with Janus characteristics for a wide range of applications: on the one hand, the exfoliated 2D materials by cathodic exfoliation via cation intercalation under a reductive environment can possess advantages such as large size, high crystallinity, and a pure phase structure; on the other hand, by using anodic exfoliation via anion intercalation, surface modifications or oxidations could occur, which allows production of atomically thin 2D materials with diverse functionalities. This review article focuses mainly on the state-of-the-art developments in the smart and effective production of different categories of atomically thin 2D materials by cathodic and anodic electrochemical exfoliation, herein named as “Janus electrochemical exfoliation”. The design strategies to realize Janus exfoliation of bulk crystals, the interfering factors such as intercalators, and the exfoliation mechanism are comprehensively summarized and discussed. More importantly, applications of these electrochemically exfoliated 2D materials in optoelectronic devices, energy storage, biosensing and catalysis are also detailed. Finally, the perspectives on the challenges and opportunities of this promising field are presented.

Graphical abstract: Janus electrochemical exfoliation of two-dimensional materials

Back to tab navigation

Publication details

The article was received on 23 Sep 2019, accepted on 24 Oct 2019 and first published on 24 Oct 2019

Article type: Review Article
DOI: 10.1039/C9TA10487A
J. Mater. Chem. A, 2019, Advance Article

  •   Request permissions

    Janus electrochemical exfoliation of two-dimensional materials

    Y. Fang, X. Li, J. Li, C. Yao, H. Y. Hoh, X. Hai, J. Lu and C. Su, J. Mater. Chem. A, 2019, Advance Article , DOI: 10.1039/C9TA10487A

Search articles by author