Journal article
Microsupercapacitor with a 500 nm gap between MXene/CNT electrodes
Nano energy, v 81, 105616
Mar 2021
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
Decreasing the size of portable, wearable, and integrated electronics requires subsequent reduction in the accompanying energy storage devices. To further decrease the size of supercapacitors without compromising device performance, adequate materials are required as well as appropriate device design. Traditionally, carbon nanomaterials have been utilized within high-performance electrochemical energy storage applications, however carbides, specifically two-dimensional (2D) transition metal carbides and or nitrides (MXenes) have shown promise. Herein, a focused-ion-beam (FIB) process is used for patterning of titanium carbide (Ti3C2) carbon nanotube (CNT) electrodes into a finely controlled coplanar interdigitated configuration. The symmetric micro supercapacitors produced have a narrow, 500 nm gap between the electrode fingers and exhibit high areal capacitance of ~317 mF cm−2 at a scan rate of 50 mV s−1 and still retain >30% of their capacitance (~104 mF cm−2) at 100 V s−1. In addition, electron beam lithography and photolithography are utilized to create almost-invisible devices with ultra-small footprints (0.04 mm2 device areas) that can be used for securing electronic components. This study provides a simple and reliable method for fabrication of on-chip symmetric MSCs with coplanar interdigitated electrodes.
MXene/CNT based coplanar interdigitated on-chip micro supercapacitors (MSCs) are demonstrated by utilizing a FIB process. The devices prepared by the FIB process feature a gap of 500 nm between fingers, achieving a higher spatial resolution compared to other methods shown before. The MXene/CNT MSCs exhibit excellent areal capacitance and superior rate capability, and their power performance benefits from the hybridization of materials with different and from the sub-500 nm finger interspacing. [Display omitted]
•MXene/CNT based micro supercapacitors (MSCs) are demonstrated by utilizing a FIB process.•The MSCs demonstratedhave a narrow, 500 nm gap between the electrode fingers.•The MXene/CNT based MSCs with 500 nm gap exhibit high areal capacitance of ~317 mF cm−2 at a scan rate of 50 mV s−1.
Metrics
Details
- Title
- Microsupercapacitor with a 500 nm gap between MXene/CNT electrodes
- Creators
- Eunji Kim - National Nano Fab Center (NNFC), Daejeon 34141, South KoreaByeong-Joo Lee - National Nano Fab Center (NNFC), Daejeon 34141, South KoreaKathleen Maleski - A. J. Drexel Nanomaterials Institute and Department of Materials Science and Engineering, Drexel University, Philadelphia, Pennsylvania 19104, United StatesYoonjeong Chae - National Nano Fab Center (NNFC), Daejeon 34141, South KoreaYonghee Lee - National Nano Fab Center (NNFC), Daejeon 34141, South KoreaYury Gogotsi - A. J. Drexel Nanomaterials Institute and Department of Materials Science and Engineering, Drexel University, Philadelphia, Pennsylvania 19104, United StatesChi Won Ahn - National Nano Fab Center (NNFC), Daejeon 34141, South Korea
- Publication Details
- Nano energy, v 81, 105616
- Publisher
- Elsevier
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Materials Science and Engineering
- Web of Science ID
- WOS:000620328500002
- Scopus ID
- 2-s2.0-85096666640
- Other Identifier
- 991014970037704721
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
- International collaboration
- Web of Science research areas
- Chemistry, Physical
- Materials Science, Multidisciplinary
- Nanoscience & Nanotechnology
- Physics, Applied