Aligned Ti 3 C 2 T X Aerogel with High Rate Performance, Power Density and Sub-Zero-Temperature Stability

Xinchao Lu, Huachao Yang, Zheng Bo, Biyao Gong, Mengyu Cao, Xia Chen, Erka Wu, Jianhua Yan, Kefa Cen and Kostya (Ken) Ostrikov
Additional contact information
Xinchao Lu: State Key Laboratory of Clean Energy Utilization, College of Energy Engineering, Zhejiang University, Hangzhou 310027, China
Huachao Yang: State Key Laboratory of Clean Energy Utilization, College of Energy Engineering, Zhejiang University, Hangzhou 310027, China
Zheng Bo: State Key Laboratory of Clean Energy Utilization, College of Energy Engineering, Zhejiang University, Hangzhou 310027, China
Biyao Gong: State Key Laboratory of Clean Energy Utilization, College of Energy Engineering, Zhejiang University, Hangzhou 310027, China
Mengyu Cao: State Key Laboratory of Clean Energy Utilization, College of Energy Engineering, Zhejiang University, Hangzhou 310027, China
Xia Chen: State Key Laboratory of Clean Energy Utilization, College of Energy Engineering, Zhejiang University, Hangzhou 310027, China
Erka Wu: Hangzhou Global Scientific and Technological Innovation Center, Zhejiang University, Hangzhou 311200, China
Jianhua Yan: State Key Laboratory of Clean Energy Utilization, College of Energy Engineering, Zhejiang University, Hangzhou 310027, China
Kefa Cen: State Key Laboratory of Clean Energy Utilization, College of Energy Engineering, Zhejiang University, Hangzhou 310027, China
Kostya (Ken) Ostrikov: State Key Laboratory of Clean Energy Utilization, College of Energy Engineering, Zhejiang University, Hangzhou 310027, China

Energies, 2022, vol. 15, issue 3, 1-12

Abstract: Ti 3 C 2 T x -based aerogels have attracted widespread attention for three-dimensional porous structures, which are promising to realize high-rate energy storage. However, disordered Ti 3 C 2 T x aerogels with highly tortuous porosity fabricated by conventional unidirectional freeze-casting substantially increase ion diffusion lengths and hinder electrolyte ions transport. Herein we demonstrate a new bidirectional ice-templated approach to synthesize porous ordered Ti 3 C 2 T x aerogel with straight and aligned channels, straight and short ion diffusion pathways, leading to better ion accessibility. The aligned Ti 3 C 2 T x aerogel exhibits the high specific capacitance of 345 F g −1 at 20 mV s −1 and rate capability of 52.2% from 10 to 5000 mV s −1 . The specific capacitance is insensitive of mass loadings even at 10 mg cm −2 and an excellent power density of 137.3 mW cm –2 is obtained in symmetric supercapacitors. The electrochemical properties of Ti 3 C 2 T x aerogel supercapacitors at sub-zero (to −30 °C) temperatures are reported for the first time. The aligned Ti 3 C 2 T x aerogel delivers temperature-independent rate performance and high capacitance retention (73% at 50 mV s −1 from 25 to −30 °C) due to the unique structure with metallic conductivity.

Keywords: supercapacitor; aligned Ti 3 C 2 T x aerogel; rate performance; power density; sub-zero-temperature stability (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations:

Downloads: (external link)
https://www.mdpi.com/1996-1073/15/3/1191/pdf (application/pdf)
https://www.mdpi.com/1996-1073/15/3/1191/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jeners:v:15:y:2022:i:3:p:1191-:d:743205

Access Statistics for this article

Energies is currently edited by Ms. Agatha Cao

More articles in Energies from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().