Journal article
MXene binder stabilizes pseudocapacitance of conducting polymers
JOURNAL OF MATERIALS CHEMISTRY A, v 9(36), pp 20356-20361
28 Sep 2021
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
Conducting polymers (CPs) are by far the most studied organic materials for supercapacitors. Yet, their structural instability stemming from volumetric expansion/contraction during charge/discharge results in capacitance loss after moderate cycling that limits their applications. Here, we show that the remarkable cycling stability, capacitance, and rate performance can be achieved by replacing conventional electrode additives (carbon black or insulating polymer binder) with titanium carbide (Ti3C2Tx) MXene. Using polyaniline (PANI) as a model system, an addition of only 15 wt% of Ti3C2Tx MXene binder delivered remarkable capacitance retention of 96% after 10 000 cycles at 50 mV s(-1) and high-rate capability with a capacitance of 434 F g(-1). Using density functional theory (DFT) calculations, we show that, unlike insulating polymer binders, surface groups of MXene bond to PANI with a significantly high binding energy (up to -2.11 eV) via a charge transfer mechanism. This is one of the key mechanisms to achieve a high electrochemical performance of the CP-based electrodes when MXene is used as a binder. We expect that a similar approach can be used for stabilizing other organic electrode materials.
Metrics
Details
- Title
- MXene binder stabilizes pseudocapacitance of conducting polymers
- Publication Details
- JOURNAL OF MATERIALS CHEMISTRY A, v 9(36), pp 20356-20361
- Publisher
- ROYAL SOC CHEMISTRY; CAMBRIDGE
- Number of pages
- 5
- Grant note
- The authors thank Prof. Yury Gogotsi for guiding this work. This work was supported as part of the Fluid Interface Reactions, Structures and Transport (FIRST) Center, an Energy Frontier Research Center funded by the U.S. Department of Energy, Office of Science, and Office of Basic Energy Sciences. R. A. thanks the Swedish Research Council (VR-2016-06014 & VR-2020-04410) and J. Gust. Richert stifelse, Sweden (202100665) for.nancial support. SNIC, HPC2N, at Sweden is acknowledged for providing the computing facilities.
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Drexel University
- Web of Science ID
- WOS:000693302500001
- Scopus ID
- 2-s2.0-85116051138
- Other Identifier
- 991021860666304721
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
- Chemistry, Physical
- Energy & Fuels
- Materials Science, Multidisciplinary