journal article·2023-09-06

Expanded Carbon Nanotube Fiber at the Liquid–Air Interface for High-Performance Fiber-Based Supercapacitors and Electrochemical Sensors

Yue Zhou, Yu Cai, Tingting Tu, Shanshan Zhang, Tianyu Li, Lu Fang, Dong Wang, Yitao Liang, Zhaoyang Wang, Yu Jiang, Congcong Zhou, Bo Liang

ACS Applied Materials & Interfaces· Volume 15· Issue 35
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Abstract

Carbon nanotube fibers (CNTFs) are widely utilized in flexible and wearable electronics due to their outstanding electrical and mechanical properties. However, the spinning process of CNTFs has limited the CNTs from exposure, leading to an ultralow usage efficiency of individual CNTs. Here, we propose an electrochemical expansion strategy of a single CNTF at the liquid–air interface, forming a macroscopic spindle-shaped CNTF (SS-CNTF) with an enlarged volume of up to 5000-fold upon the spindle. The obtained spindle-shaped structure endows CNTF with a high specific surface area together with excellent conductivity and good mechanical properties. Therefore, the SS-CNTF-based devices exhibit outstanding performances both in energy storage (electrical double-layer supercapacitor, energy density: 11.22 Wh kg –1, power density: 203.9 kW kg –1 ) and electrochemical sensing (ascorbic acid: 1.26 μA μM –1 cm –2; dopamine: 103.91 μA μM –1 cm –2; uric acid: 11.53 μA μM –1 cm –2 ). The novel architecture of SS-CNTF prepared by one-step electrochemical expansion at the liquid–air interface enabled its high performance in multiple applications, providing new insight into the development of CNTF-based devices.
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Research context

OpenAlex topics: Supercapacitor Materials and Fabrication · Carbon Nanotubes in Composites · Advanced Sensor and Energy Harvesting Materials

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Biosensor National Special Laboratory, Key Laboratory of Biomedical Engineering of Ministry of Education, College of Biomedical Engineering and Instrument Science, Zhejiang University, Hangzhou, Zhejiang 310027, P. R. China

Department of General Surgery, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang 310027, P. R. China

College of Automation, Hangzhou Dianzi University, Hangzhou, Zhejiang 310018, P. R. China

National Engineering Research Center for Innovation and Application of Minimally Invasive Devices, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang 310016, P. R. China

Binjiang Institute of Zhejiang University, Hangzhou 310053, P. R. China

Funding

Primary Research and Development Plan of Zhejiang Province · Fundamental Research Funds for the Central Universities · National Natural Science Foundation of China · Natural Science Foundation of Zhejiang Province · Zhejiang University K.P.Chao’s High Technology Development Foundation

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