Theoretical prediction of MXene-like structured Ti3C4 as a high capacity electrode material for Na ion batteries. Issue 43 (27th October 2017)

• Record Type: Journal Article
• Authors: Meng, Qiangqiang; Hu, Alice; Zhi, Chunyi; Fan, Jun
• Is Part Of: Physical chemistry chemical physics. Volume 19:Issue 43(2017)
• Page Start: 29106
• Page End: 29113
• Publication Date: 2017-10-27
• Subjects: Chemistry, Physical and theoretical -- Periodicals; 541.3
• DOI: 10.1039/c7cp06171d
• Languages: English
• ISSNs: 1463-9076

Abstract

Abstract : MXenes are attracting much attention as electrode materials due to their excellent energy storage properties and good electrical conductivity. Abstract : MXenes are attracting much attention as electrode materials due to their excellent energy storage properties and good electrical conductivity. Here a carbonized derivative of Ti3 C2 (one representative MXene material), a Ti3 C4 monolayer, is designed. Density functional theory (DFT) calculations were performed to investigate the geometric and electronic properties, dynamic stability, and Li/Na storage capability of Ti3 C4 . The Ti3 C4 monolayer is proved to be a structurally stable material showing the nature of the metal with C2 dimers rather than the individual C atom. Moreover, the Ti3 C4 monolayer exhibits a low diffusion barrier and high storage capacity (up to Ti3 C4 Na4 stoichiometry) in Na ion batteries (NIBs) compared with Li ion batteries (LIBs). Its superior properties, such as good electronic conductivity, fast Na diffusion, low open circuit voltage (OCV), and high theoretical Na storage capacity, make the Ti3 C4 monolayer a promising anode material for NIBs. More importantly, similar to MXene Ti3 C2, new M3 C4 monolayers with C2 dimers can be formed by replacing M with other transition metal elements, and the properties of these monolayers are worthy of further study.