Polymer network-derived nitrogen/sulphur co-doped three-dimensionally interconnected hierarchically porous carbon for
Zili Xu1, Fangfang Zhang2, Weiran Lin3
1State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology Nr. 122 Luoshi Rd. Wuhan 430070 China haining.zhang@whut.edu.cn.
Abstract:
Rational design and simple synthesis of carbon-based materials with high electrocatalytic activity are essential for their practical applications in electrochemical energy conversion and storage devices. Herein, we report the synthesis of nitrogen, sulfur co-doped three-dimensional interconnected hierarchically porous carbon (NSHPC) by zinc acetate assisted pyrolysis of polymer networks. The thus-synthesized NSHPC has a specific surface area of 1057 cm2 g-1 with the coexistence of micro- and meso-pores. As metal-free electrocatalyst, the NSHPC exhibits a promising activity towards oxygen reduction reactions as evidenced by the slightly negative shift of half-wave potential compared with commercial Pt/C catalyst. The assembled lithium ion battery using NSHPC as anode delivers the reversible capacity of 740 and 470 mA h g-1 at current densities of 2 and 5 A g-1 without performance decay after 1000 charge-discharge cycles. Moreover, the assembled supercapacitor using NSHPC as electrode has the capacitance of 203 F g-1 at 1 A g-1.
