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. 2022 Dec 7;66(3):944–954. doi: 10.1007/s40843-022-2268-9

Engineering chemical-bonded Ti3C2 MXene@carbon composite films with 3D transportation channels for promoting lithium-ion storage in hybrid capacitors

具有三维传输通道的化学键合Ti3C2 MXene@C复合材料促进混合电容器中的锂离子存储

Min Feng 1, Wanli Wang 1, Zhaowei Hu 1, Cheng Fan 1, Xiaoran Zhao 1, Peng Wang 1, Huifang Li 1, Lei Yang 2,3, Xiaojun Wang 1,3,✉, Zhiming Liu 1,✉
PMCID: PMC10015531  PMID: 36937247

Abstract

Lithium-ion capacitors (LICs) are promising energy storage devices because they feature the high energy density of lithium-ion batteries and the high power density of supercapacitors. However, the mismatch of electrochemical reaction kinetics between the anode and cathode in LICs makes exploring anode materials with fast ion diffusion and electron transfer channels an urgent task. Herein, the two-dimensional (2D) Ti3C2 MXene with controllable terminal groups was introduced into 1D carbon nanofibers to form a 3D conductive network by the electrospinning strategy. In such Ti3C2 MXene and carbon matrix composites (named KTi-400@CNFs), the 2D nanosheet structure endows Ti3C2 MXene with more active sites for Li+ ion storage, and the carbon framework is favorable to the conductivity of the composites. Impressively, Ti-O-C bonds are formed at the interface between Ti3C2 MXene and the carbon framework. Such chemical bonding in the composites builds a bridge for rapid electron transportation and quick ion diffusion in the longitudinal direction from layer to layer. As a result, the optimized KTi-400@CNFs composites maintain a good capacity of 235 mA h g−1 for 500 cycles at a current density of 5 A g−1. The LIC consisting of the KTi-400@CNFs//AC configuration achieves high energy density (114.3 W h kg−1) and high power density (12.8 kW kg−1). This paper provides guidance for designing 2D materials and the KTi-400@CNFs composites with such a unique structure and superior electrochemical performance have great potential in the next-generation energy storage fields.

graphic file with name 40843_2022_2268_Fig1_HTML.jpg

Electronic Supplementary Material

Supplementary material is available for this article at 10.1007/s40843-022-2268-9 and is accessible for authorized users.

Keywords: Ti3C2, carbon nanofibers, Ti-O-C chemical bonds, 3D transportation channels, lithium-ion capacitors

Supplementary Information

40843_2022_2268_MOESM1_ESM.pdf (1MB, pdf)

Engineering chemical-bonded Ti3C2 MXene@carbon composite films with 3D transportation channels for promoting lithium-ion storage in hybrid capacitors

Acknowledgements

This work was supported by the National Natural Science Foundation of China (22005167 and 21905152), Shandong Provincial Natural Science Foundation (ZR2020QB125 and ZR2020MB045), China Postdoctoral Science Foundation (2021M693256, 2021T140687 and 2022M713249), Qingdao Postdoctoral Applied Research Project, Taishan Scholar Project of Shandong Province (ts20190937), and the Youth Innovation Team Project for Talent Introduction and Cultivation in Universities of Shandong Province.

Author contributions Wang X planned and designed the project; Feng M performed all the experiments and analyzed the data; Wang X and Feng M wrote this paper; Liu Z provided some guidance and suggestions on the experiments; Wang W and Hu Z helped to synthesize the materials; Fan C and Zhao X helped to characterize the samples; Wang P provided suggestions on the experiments; Li H and Yang L provided guidance on the paper. All the authors contributed to the general discussion.

Conflict of interest The authors declare that they have no conflict of interest.

Footnotes

Supplementary information Supporting data are available in the online version of the paper.

Min Feng is currently a Master’s student at Qingdao University of Science and Technology, under the guidence of associate professor Xiaojun Wang. Her research focuses on the preparation of Ti3C2Tx (MXene)-based composite nanomaterials and their applications in energy storage fields.

Xiaojun Wang is currently an associate professor at the College of Electromechanical Engineering, Qingdao University of Science and Technology. She received her PhD degree from Nankai University in 2019 and then continued with her post-doctoral research at Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences. Her research interests include advanced energy storage materials and devices, such as sodium-ion batteries and zinc-ion batteries.

Zhiming Liu is currently a professor at Qingdao University of Science and Technology. He earned his PhD degree in energy engineering from Hanyang University in Korea in 2018 and then continued his post-doctoral research under the supervision of Dr. Guanglei Cui at Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences. His research focuses on functional nanomaterials for electrochemical energy storage and conversion.

Contributor Information

Xiaojun Wang, Email: wangxiaojunchem@163.com.

Zhiming Liu, Email: zmliu@qust.edu.cn.

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Supplementary Materials

40843_2022_2268_MOESM1_ESM.pdf (1MB, pdf)

Engineering chemical-bonded Ti3C2 MXene@carbon composite films with 3D transportation channels for promoting lithium-ion storage in hybrid capacitors

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