lithium-ion batteries and supercapacitors · lithium-ion batteries and supercapacitors chunfeng...
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Electronic Supplementary Information
Self-assembly synthesis of nitrogen-doped mesoporous
carbons used as high-performance electrode materials in
lithium-ion batteries and supercapacitors
Chunfeng Shaoa, Ziqiang Wangb, Errui Wanga, Shujun Qiua, Hailiang Chua*,
Yongjing Zoua, Cuili Xianga, Fen Xua, Lixian Suna*
a Guangxi Key Laboratory of Information Materials, Guangxi Collaborative
Innovation Center of Structure and Property for New Energy and Materials and
School of Materials Science and Engineering, Guilin University of Electronic
Technology, Guilin 541004 P.R. China
b College of Chemical Engineering, Zhejiang University of Technology, Hangzhou
310014, P.R. China
*Corresponding authors:
H.L. Chu, Email: [email protected]
L.X. Sun, Email: [email protected]
Tel.: +86-773-2216607
Fax: +86-773-2290129
Electronic Supplementary Material (ESI) for New Journal of Chemistry.This journal is © The Royal Society of Chemistry and the Centre National de la Recherche Scientifique 2017
(b)(a)
Fig. S1 SEM images of NMC-1 and NMC-3.
Fig. S2 Small-angle XRD patterns of MC and NMCs.
Fig. S3 CV curves of NMC-2 anode for the initial three cycles.
Fig. S4 Nyquist plots of MC and NMCs. Inset: the magnified Nyquist plots.
(a) (b)
(d)
(e)
(c)
Fig. S5 (a) CV curves of as-prepared samples at 200 mV s-1, (b) GCD curve of Ni foam, (c) CV curve of Ni foam at 5 mV s-1, (d) CV curves of as-prepared samples and Ni foam at 5 mV s-1, (e) CV curves of as-prepared samples and Ni foam at 200 mV s-1.
In order to confirm the capacitance contributed from the Ni foam, the
electrochemical characterization of Ni foam was carried out at the same current of
NMC-2 and the same scan rate. The charge-discharge tests of Ni foam are
implemented at current of 0.00375 A (Fig. S5b), which is same as the current of
NMC-2 at 0.5 A g-1. The specific capacitance is only 0.5 F g-1. In addition, the
comparisons of CV curves in the presence/absence active materials at the same
scanning rate are presented in Fig. S5d and e. Therefore, the capacitance contributed
from the Ni foam is very little can be neglectful.
Fig. S6 Nyquist plots of MC and NMCs before charge and discharge under open-circuit voltage. Inset: the magnified Nyquist plots.