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Issue 34, 2017
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H2O-induced self-propagating synthesis of hierarchical porous carbon: a promising lithium storage material with superior rate capability and ultra-long cycling life

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Abstract

Hierarchical porous carbon (HPC) has attracted much attention in tackling global environmental and energy problems. For the state-of-the-art routes to synthesize HPC from organic compounds, the emission of carbon dioxide (CO2) and gaseous pollutants is inevitable during thermal carbonization. Herein, we report an environmentally benign and high-yield route to synthesize HPC from CO2via H2O-induced self-propagating reactions. By introducing an initiator of H2O, CO2 can react with lithium hydride (LiH) to produce HPC in 13 seconds at low temperatures. The as-synthesized HPC exhibits an interconnected micro–meso–macropore network structure with a high porosity of 83%. The formation mechanism of HPC is discussed on the basis of the conversion reactions from CO2 to C and the gas blowing effect in producing hierarchical porosity. The HPC evaluated as an anode material for lithium-ion batteries not only delivers a high reversible capacity of ∼1150 mA h g−1 at a current density of 0.2 A g−1, but also exhibits superior rate capability (∼825 mA h g−1 at 1.0 A g−1) and excellent cycling properties (up to 2000 cycles). This research opens a new avenue both to synthesize HPC from CO2 on a large scale and to mitigate greenhouse gas from the atmosphere.

Graphical abstract: H2O-induced self-propagating synthesis of hierarchical porous carbon: a promising lithium storage material with superior rate capability and ultra-long cycling life

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Publication details

The article was received on 10 Jun 2017, accepted on 31 Jul 2017 and first published on 31 Jul 2017


Article type: Paper
DOI: 10.1039/C7TA05064J
Citation: J. Mater. Chem. A, 2017,5, 18221-18229
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    H2O-induced self-propagating synthesis of hierarchical porous carbon: a promising lithium storage material with superior rate capability and ultra-long cycling life

    C. Liang, S. Liang, Y. Xia, Y. Chen, H. Huang, Y. Gan, X. Tao, J. Zhang and W. Zhang, J. Mater. Chem. A, 2017, 5, 18221
    DOI: 10.1039/C7TA05064J

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