Files and links (1)
Published, Version of Record (VoR)CC BY-NC-ND V4.0, Open
Journal article
Effect of pinholes in Nb4C3 MXene sheets on its electrochemical behavior in aqueous electrolytes
Electrochemistry communications, v 142, 107380
Sep 2022
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
[Display omitted]
•Pinholes were introduced into 2D MXene flakes by controlling etching time.•Pinholes in MXene effectively improve the ion diffusion by shortening the ion transport path.•Introduction of pinholes into Nb4C3Tx MXene flakes increased the capacitance of an electrode by a factor of four.
Two-dimensional (2D) niobium carbide, Nb4C3Tx (Tx: O, OH, and F), a representative member of the 43 MXene structural motif, has shown promising electrochemical performance in acidic electrolytes. The capacitive performance of Nb4C3Tx in neutral aqueous electrolytes has been reported as moderate, but little effort has been made to improve it. In this paper, we report a method to introduce nanopores (pinholes) in Nb4C3Tx MXene flakes by adjusting the etching time. The pinholes generated during the etching process improve ion diffusion pathways, which are otherwise hindered by the restacking of the 2D flakes. The “holey Nb4C3Tx” shows a 50 % improved rate capability at charge/discharge time scales of 1–2 s in 1 M Li2SO4, Na2SO4, and (NH4)2SO4 electrolytes. Our strategy of controlling the permeability of Nb4C3Tx sheets can potentially be applied to other MXenes, providing guidance for improving the capacitance and rate capability of 2D materials.
Metrics
Details
- Title
- Effect of pinholes in Nb4C3 MXene sheets on its electrochemical behavior in aqueous electrolytes
- Creators
- Shuangshuang Zhao - Jilin UniversityXuehang Wang - Drexel UniversityNarendra Kurra - Drexel UniversityYury Gogotsi - A. J. Drexel Nanomaterials Institute, and Department of Materials Science and Engineering, Drexel University, Philadelphia, PA 19104, United StatesYu Gao - Key Laboratory of Physics and Technology for Advanced Batteries (Ministry of Education), College of Physics, Jilin University, Changchun 130012, PR China
- Publication Details
- Electrochemistry communications, v 142, 107380
- Publisher
- Elsevier
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Materials Science and Engineering; A.J. Drexel Nanomaterials Institute
- Web of Science ID
- WOS:000879001500002
- Scopus ID
- 2-s2.0-85140318900
- Other Identifier
- 991019240402304721
UN Sustainable Development Goals (SDGs)
This publication has contributed to the advancement of the following goals:
InCites Highlights
Data related to this publication, from InCites Benchmarking & Analytics tool:
- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Electrochemistry