| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
2D Materials – Preparation, Properties, Modeling & Applications
|
| Presentation Title |
Stability of Pseudocapacitive Energy Storage in Ti3C2Tx MXene in a Wide Temperature Range |
| Author(s) |
Ruocun Wang, Mark Anayee, Teng Zhang, Mikhail Shekhirev, Kateryna Shevchuk, Yury Gogotsi |
| On-Site Speaker (Planned) |
Ruocun Wang |
| Abstract Scope |
Pseudocapacitors have the potential to achieve high energy and high power density simultaneously, a holy grail for electrochemical energy storage. However, one obstacle facing pseudocapacitors is their shorter lifetime compared to commercial supercapacitors using the double-layer charge storage mechanism. In MXene-based pseudocapacitors, this concern is pronounced particularly at high temperatures due to the limited stability of the active material in aqueous solutions. This work shows that Ti3C2Tx MXene thin-film electrodes in 5 M H2SO4 possess excellent rate capabilities from -50 °C to 70 °C but also a sufficient lifetime at 70 °C using a float test holding at -0.9 V vs. Hg/Hg2SO4. Post-mortem characterization using X-ray photoelectron spectroscopy and Raman spectroscopy showed no signs of oxidation in the bulk of the film. This work suggests sufficient stability of Ti3C2Tx MXene as a negative electrode in protic aqueous electrolytes across a wide temperature range, making it promising for pseudocapacitor energy storage. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Energy Conversion and Storage, Nanotechnology, Environmental Effects |