Back to results
US 2020/0399771 A1Published application
Method for hf-free facile and rapid synthesis of mxenes related compounds
AssigneeThe Hong Kong Polytechnic University
InventorsJianhua HAO, Sin Yi PANG
Life of this patent
Estimating the term…
Abstract
Provided herein is a method for preparing MXenes, such as Ti2CTx, Cr2CTx, and V2CTx, products prepared therefrom, and compositions and devices including the same.
Claims20
A method for preparing a MXene, the method comprising:
- providing a composite electrode comprising at least one MAX-phase composition and a carbonaceous material, wherein the at least one MAX-phase composition has an empirical formula of Mn+1AXn or M2M′nXn+1, wherein each of M and M′ is independently a Group IIIB, IVB, VB, or VIB metal;
- A is a Group IIB, IIIA, IVA, or VA element;
- and each X is C, N, or a combination thereof;
- and n is 1, 2, or 3;
- a counter electrode;
- and
- an electrolyte solution comprising an etchant between and in contact with the composite electrode and the counter electrode;
- and
- applying an electric current between the composite electrode and the counter electrode resulting in electrolytic reduction of the at least one MAX-phase composition thereby forming the MXene, wherein the electrolytic reduction is conducted at a temperature between 25 to 80° C.
6 more elements
A method for preparing a MXene, the method comprising:
- providing a composite electrode comprising at least one MAX-phase composition;
- a carbonaceous material selected from the group consisting of CB, CFC, and combinations thereof;
- a binder, wherein the at least one MAX-phase composition has an empirical formula of Mn+1AXn, wherein each of M is Cr, Ti, and V;
- A is Al;
- and each X is C or N;
- and n is 1, 2, or 3;
- wherein the at least one MAX-phase composition and carbonaceous material are present in the composite electrode in a mass ratio of 90:10 to 99:1;
- and wherein the binder is present in the composite electrode in a weight ratio of 1.0-1.5% by mass;
- a counter electrode;
- and
- an electrolyte solution comprising 0.5 to 1.5 M HCl between and in contact with the composite electrode and the counter electrode;
- and
- applying an electric current between the composite electrode and the counter electrode at a voltage 0.2 to 1.5 V for 8 to 10 hours resulting in the electrolytic reduction of the at least one MAX-phase composition thereby forming the MXene, wherein the electrolytic reduction is conducted at a temperature between 45 to 55° C.
10 more elements
Dependencies are inferred from the claim text.