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Highly stable lithium ion capacitor enabled by hierarchical polyimide derived carbon microspheres combined with 3D current collectors

Abstract

Lithium ion capacitors (LICs) combine both merits of lithium ion batteries and supercapacitors, which have recently attracted considerable attention. However, the LICs generally use different materials synthesis route in the cathode versus the anode, to make the production process complicated and costly from an energy storage device perspective. Additionally, the current collector interface structure designing plays a key role in electrochemical process. Herein, we have designed and fabricated a novel LIC with a similar-symmetric architecture in both electrodes. The nitrogen-doped porous carbon microsphere (NPCM) derived from hierarchical assembly of polyimide nanosheets as the anode materials shows excellent lithium storage properties. The cathode materials (NPCM-A) obtained by NPCM activation lead to an ultrahigh specific surface area (2007 m2 g−1) and an excellent capacitance characteristic. Benefiting from the unique superstructure and 3D porous arrays current collectors, the novel LIC achieves a high energy density of 95.08 Wh kg1 and it could remain 48.2 Wh kg1 even at 15 kW kg1 on the basis of mass of both electrodes. Moreover, The LIC achieves 80.1% capacity retention after 5000 ultra-long cycles, corresponding to 0.004% fading per cycle.

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Publication details

The article was received on 10 Jul 2017, accepted on 10 Oct 2017 and first published on 10 Oct 2017


Article type: Paper
DOI: 10.1039/C7TA05972H
Citation: J. Mater. Chem. A, 2017, Accepted Manuscript
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    Highly stable lithium ion capacitor enabled by hierarchical polyimide derived carbon microspheres combined with 3D current collectors

    J. Jiang, P. Nie, B. Ding, Y. Zhang, G. Xu, L. Wu, H. Dou and X. Zhang, J. Mater. Chem. A, 2017, Accepted Manuscript , DOI: 10.1039/C7TA05972H

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