Journal article
All-MXene (2D titanium carbide) solid-state microsupercapacitors for on-chip energy storage
Energy & environmental science, v 9(9), pp 2847-2854
2016
Abstract
On-chip energy storage is a rapidly evolving research topic, opening doors for the integration of batteries and supercapacitors at the microscale on rigid and flexible platforms. Recently, a new class of two-dimensional (2D) transition metal carbides and nitrides (so-called MXenes) has shown great promise in electrochemical energy storage applications. Here, we report the fabrication of all-MXene (Ti3C2Tx) solid-state interdigital microsupercapacitors by employing a solution spray-coating method, followed by a photoresist-free direct laser cutting method. Our prototype devices consisted of two layers of Ti3C2Txwith two different flake sizes. The bottom layer was stacked large-size MXene flakes (lateral dimensions of 3–6 μm) serving mainly as current collectors. The top layer was made of small-size MXene flakes (∼1 μm) with a large number of defects and edges as the electroactive layer responsible for energy storage. Compared to Ti3C2Txmicro-supercapacitors with platinum current collectors, the all-MXene devices exhibited a much lower contact resistance, higher capacitances and better rate-capabilities. Areal and volumetric capacitances of ∼27 mF cm−2and ∼357 F cm−3, respectively, at a scan rate of 20 mV s−1were achieved. The devices also demonstrated excellent cyclic stability, with 100% capacitance retention after 10 000 cycles at a scan rate of 50 mV s−1. This study opens up a plethora of possible designs for high-performance on-chip devices employing different chemistries, flake sizes and morphologies of MXenes and their heterostructures.
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649 citations in Scopus
Details
- Title
- All-MXene (2D titanium carbide) solid-state microsupercapacitors for on-chip energy storage
- Creators
- You-Yu Peng - School of Defense Science, Chung Cheng Institute of Technology, National Defense University, Taoyuan City, TaiwanBilen Akuzum - A. J. Drexel Nanomaterials Institute, Department of Materials Science and Engineering, Drexel University, Philadelphia, USANarendra Kurra - A. J. Drexel Nanomaterials Institute, Department of Materials Science and Engineering, Drexel University, Philadelphia, USAMeng-Qiang Zhao - A. J. Drexel Nanomaterials Institute, Department of Materials Science and Engineering, Drexel University, Philadelphia, USAMohamed Alhabeb - A. J. Drexel Nanomaterials Institute, Department of Materials Science and Engineering, Drexel University, Philadelphia, USABabak Anasori - A. J. Drexel Nanomaterials Institute, Department of Materials Science and Engineering, Drexel University, Philadelphia, USAEmin Caglan Kumbur - Electrochemical Energy Systems Laboratory, Department of Mechanical Engineering and Mechanics, Drexel University, Philadelphia, USAHusam N Alshareef - Department of Materials Science and Engineering, King Abdullah University of Science and Technology (KAUST), Thuwal, Kingdom of Saudi ArabiaMing-Der Ger - Department of Chemical & Materials Engineering, Chung Cheng Institute of Technology, National Defense University, Taoyuan City, TaiwanYury Gogotsi - A. J. Drexel Nanomaterials Institute, Department of Materials Science and Engineering, Drexel University, Philadelphia, USA
- Publication Details
- Energy & environmental science, v 9(9), pp 2847-2854
- Publisher
- Royal Society of Chemistry
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Materials Science and Engineering; Mechanical Engineering and Mechanics
- Scopus ID
- 2-s2.0-84984908012
- Other Identifier
- 991014969850404721