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: chuhailiang@guet.edu.cn

L.X. Sun, Email: sunlx@guet.edu.cn

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.