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Ionogel electrolyte based TiO2(B)@C/CNT//AC quasi-solid-state lithium-ion capacitors

  • Bosen LI Jiahe ZHANG Lipeng YANG Jiajia LI Chunxian XING Haitao ZHANG
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  • 1. Beijing Key Laboratory of Ionic Liquids Clean Process, CAS Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China 2. School of Chemical Engineering, University of Chinese Academy of Sciences, Beijing 100049, China

Received date: 2020-05-12

  Revised date: 2020-05-25

  Online published: 2021-04-28

Abstract

Lithium-ion capacitors (LICs) are attracting extensive attentions owing to their high energy density, rapid power output, and excellent cyclability. However, one of the key challenges encountered by LICs is balancing the sluggish kinetics of intercalation electrodes against capacitive electrodes. In this work, a TiO2(B)@C/CNT nanohybrid electrode was synthetized by a microwave-assisted solvothermal method. The nanohybrids exhibited a high reversible capacity of 291 mAh/g and high kinetic characteristics. Subsequently, a polyimide (PI) membrane was prepared by electrospinning technique for the construction of a ternary ionogel electrolyte. The ionogel electrolyte exhibited high ionic conductivity and electrochemical stability. Notably, a quasi-solid-state lithium-ion capacitor (QSLIC) was assembled with TiO2(B)@C/CNT as anode, commercial activated carbon (AC) as cathode and the ionogel electrolyte. It delivered a maximum energy density of 83.1 Wh/kg and a maximum power density of 18338.1 W/kg at 60℃. Moreover, the electrochemical performances of the QSLIC exhibited an obvious temperature dependence.

Cite this article

Bosen LI Jiahe ZHANG Lipeng YANG Jiajia LI Chunxian XING Haitao ZHANG . Ionogel electrolyte based TiO2(B)@C/CNT//AC quasi-solid-state lithium-ion capacitors[J]. The Chinese Journal of Process Engineering, 2021 , 21(4) : 479 -487 . DOI: 10.12034/j.issn.1009-606X.220150

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