High-performance aqueous zinc-ion hybrid micro-supercapacitors enabled by surface-modified Ti3C2 MXene anode and polar organic molecule intercalated AlxV2O5 cathode

Weifeng Liu, Jixuan Zhang, Jitao Li, Zhuang Ma, Lingling Sun, Yamin Feng and Long Zhang

Energy, 2025, vol. 334, issue C

Abstract: The Ti3C2Tx MXene has emerged as an ideal anode material for aqueous Zn-ion hybrid micro-supercapacitors (AZHMSCs) due to its high conductivity, excellent stretchability, and modifiable surface functional groups. However, the interlayer stacking effect and inert –F functional groups limit its ion transport and charge storage capabilities. In this study, a deep alkali treatment strategy is proposed to convert Ti3C2Tx MXene nanosheets into m-Ti3C2 MXene nanofibers with oxygen-rich surface terminal functional groups. This structure not only alleviates interlayer stacking but also shows enhanced Zn2+ adsorption affinity via oxygen groups, resulting in a specific capacitance of 1231.8 mF cm−2 at 1 mA cm−2. Meanwhile, the cathode employs polar organic molecules, specifically NMP, intercalated into AlxV2O5. The strong electrostatic interaction between NMP and pre-embedded aluminum ions improves material structural stability (96.05 % capacity retention after 5000 cycles) and enhances specific capacity (327.78 μAh cm−2 at 0.5 mA cm−2). AZHMSCs assembled with these modified electrodes exhibit excellent electrochemical performance: an energy density of 105.15 μWh cm−2 at a power density of 0.48 mW cm−2, capacity retention rate of 89.29 % after 3000 cycles, and good bending stability. This study offers a novel approach for electrode design and the construction of high-performance micro-energy storage devices.

Keywords: Micro-energy storage; Surface modification; m-Ti3C2 MXene; AlxV2O5-NMP; Nanofibers (search for similar items in EconPapers)
Date: 2025
References: Add references at CitEc
Citations:

Downloads: (external link)
http://www.sciencedirect.com/science/article/pii/S0360544225032906
Full text for ScienceDirect subscribers only

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:eee:energy:v:334:y:2025:i:c:s0360544225032906

DOI: 10.1016/j.energy.2025.137648

Access Statistics for this article

Energy is currently edited by Henrik Lund and Mark J. Kaiser

More articles in Energy from Elsevier
Bibliographic data for series maintained by Catherine Liu ().