Details

Autor(en) / Beteiligte

• He, Liping
• Wu, Fang
• Bai, Mingkai
• Ruan, Haibo
• Fang, Liang
• Hu, Jia
• Luo, Haijun
• Zhang, Shufang
• Hu, Baoshan
• Zhou, Miao

Titel

NiCo-S nanosheets grown on Ti3C2Tx-wrapped carbon cloth for high-performance flexible supercapacitor

Ist Teil von

• Journal of alloys and compounds, 2022-07, Vol.908, p.164493, Article 164493

Ort / Verlag

Lausanne: Elsevier B.V

Erscheinungsjahr

2022

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• In this study, Ti3C2Tx was directly deposited on carbon cloth (CC) to obtain a flexible substrate for NiCo-S. Then, 3D self-supported flexible NiCo-S/Ti3C2Tx/CC composite electrode was prepared by a two-step hydrothermal method. Compared with the NiCo-S/CC electrode, the specific capacity of the NiCo-S/Ti3C2Tx/CC electrode increases from 908 to 1690 C g−1 at 2 A g−1. The rate capability (2–20 A g−1) increases from 42% to 66%, and the cyclic performance (5000 charge-discharge cycles at a current density of 10 A g−1) increases from 50% to 82%. The enhanced electrochemical performance may be attributed to the introduction of Ti3C2Tx, which reduces the resistance of composite and facilitates the electron/ion transport, while the presence of Ti2+ in Ti3C2Tx provides more sites for redox reactions. The assembled flexible all-solid supercapacitor (NiCo-S/Ti3C2Tx/CC//AC) manifests a high energy density of 62 Wh kg−1 at 800 W kg−1 and an excellent cyclic stability with 89% capacity retention after 5000 cycles at 10 A g−1. In addition, the device demonstrates no obvious capacity change at different states and bending angles, showing broad application prospects in high-performance wearable energy-storage devices. •NiCo-S/Ti3C2Tx/CC flexible electrode was fabricated by a two-step hydrothermal method.•Introduction of high conductive Ti3C2Tx improved electrochemical performance.•-The assembled ASCs supercapacitor shows well stability at different states and bending angles.