Surface Engineering in Mesoporous Single Crystal to Enhance Pseudocapacitance. (12th November 2020)

• Record Type: Journal Article
• Authors: Ye, Lingting; Xi, Shaobo; Li, Hao; Lin, Guoming; Xie, Kui
• Is Part Of: Advanced functional materials. Volume 31:Number 7(2021)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2020-11-12
• Subjects: chemisorption -- coordination structure -- stability -- surface engineering -- twisted surface; Materials -- Periodicals; Chemical vapor deposition -- Periodicals; 620.11
• DOI: 10.1002/adfm.202008900
• Languages: English
• ISSNs: 1616-301X

Abstract

Abstract: Mesoporous single crystals combining the ordering of crystal lattice and the disordering of interconnected pores would create well‐defined structures confined at continuously twisted surfaces that are kinetically trapped. Here, mesoporous WN single crystal at 2 cm scale is grown to create and engineer the well‐defined surface structures. The unsaturated coordination structures including W–N1/2, W–N1/3, and W–N1/6 confined at twisted surfaces account for the chemisorption of H in acidic electrolyte and deliver a record high areal capacitance of ≈250 F cm −2 without degradation being observed even after 15 000 cycles. The engineering of well‐defined coordination structures at twisted surfaces would open an alternative to create active surfaces in the wealth of other single‐crystalline materials. Abstract : Well‐defined unsaturated coordination confined at twisted surfaces in mesoporous single crystals at 2 cm scale leads to a record high pseudocapacitance comparable to theoretical values.