Files and links (1)
SubmittedOpen Access (License Unspecified), Open
Journal article
An Ultrafast Conducting Polymer@MXene Positive Electrode with High Volumetric Capacitance for Advanced Asymmetric Supercapacitors
Small (Weinheim an der Bergstrasse, Germany), v 16(4), pp e1906851-n/a
28 Jan 2020
PMID: 31867874
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
Pseudocapacitors or redox capacitors that synergize the merits of batteries and double‐layer capacitors are among the most promising candidates for high‐energy and high‐power energy storage applications. 2D transition metal carbides (MXenes), an emerging family of pseudocapacitive materials with ultrahigh rate capability and volumetric capacitance, have attracted much interest in recent years. However, MXenes have only been used as negative electrodes as they are easily oxidized at positive (anodic) potential. To construct a high‐performance MXene‐based asymmetric device, a positive electrode with a compatible performance is highly desired. Herein, an ultrafast polyaniline@MXene cathode prepared by casting a homogenous polyaniline layer onto a 3D porous Ti3C2Tx MXene is reported, which enables the stable operation of MXene at positive potentials because of the enlarged work function after compositing with polyaniline, according to the first‐principle calculations. The resulting flexible polyaniline@MXene positive electrode demonstrates a high volumetric capacitance of 1632 F cm−3 and an ultrahigh rate capability with 827 F cm−3 at 5000 mV s−1, surpassing all reported positive electrodes. An asymmetric device is further fabricated with MXene as the anode and polyaniline@MXene as the cathode, which delivers a high energy density of 50.6 Wh L−1 and an ultrahigh power density of 127 kW L−1.
A Ti3C2Tx‐based positive electrode with enlarged work function is developed by coating Ti3C2Tx MXene with polyaniline, which combines both the high redox capacitance of polyaniline and the high rate capability of the MXene synergistically. The further assembled asymmetric device delivers high volumetric power and energy densities in acid electrolyte.
Metrics
Details
- Title
- An Ultrafast Conducting Polymer@MXene Positive Electrode with High Volumetric Capacitance for Advanced Asymmetric Supercapacitors
- Creators
- Ke Li - Fudan UniversityXuehang Wang - Drexel UniversityShuo Li - Charles University in PraguePatrick Urbankowski - Drexel UniversityJianmin Li - Drexel UniversityYuxi Xu - Fudan UniversityYury Gogotsi - Drexel University
- Publication Details
- Small (Weinheim an der Bergstrasse, Germany), v 16(4), pp e1906851-n/a
- Publisher
- Wiley
- Number of pages
- 8
- Grant note
- Program for Professor of Special Appointment (Eastern Scholar) at Shanghai Institutions of Higher Learning (TP2015002) Energy Frontier Research Center Basic Energy Sciences Young Elite Scientist Sponsorship Program by CAST (2017QNRC001) Fluid Interface Reactions, Structures, and Transport National Natural Science Foundation of China (51673042; 51873039) Fudan University Exchange Program Scholarship for Doctoral Students U.S. Department of Energy Office of Science
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Materials Science and Engineering; A.J. Drexel Nanomaterials Institute
- Web of Science ID
- WOS:000503853600001
- Scopus ID
- 2-s2.0-85077172593
- Other Identifier
- 991014877756704721
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:
Highly Cited Paper
- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Chemistry, Multidisciplinary
- Chemistry, Physical
- Materials Science, Multidisciplinary
- Nanoscience & Nanotechnology
- Physics, Applied
- Physics, Condensed Matter