fig. s3 sem image of as-prepared hollow co9s8 nanoneedles. fig. s4 sem images of the co9s8 nanotubes...

Hexagonal Prism-like Hierarchical Co 9 S 8 @Ni(OH) 2 Core- shell Nanotubes on Carbon Fibers for High-Performance Asymmetric Supercapacitors Fangfang Zhu, a Ming Yan, b Yu Liu, a,* Hao shen, a Yong Lei c and Weidong Shi a,* a School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang, 212013, P. R. China. b School of Material Science and Engineering, Jiangsu University, Zhenjiang, 212013, P. R. China c Institute of Physics & IMN MacroNano (ZIK), Ilmenau University of Technology, Ilmenau 98693, Germany * E-mail: [email protected]. Tel: +86-511-88791800 Keywords: supercapacitor; core-shell; nanotube arrays; asymmetric supercapacitor Electronic Supplementary Material (ESI) for Journal of Materials Chemistry A. This journal is © The Royal Society of Chemistry 2017

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Page 1: Fig. S3 SEM image of as-prepared hollow Co9S8 nanoneedles. Fig. S4 SEM images of the Co9S8 nanotubes synthesized at 150 ˚C for 10h. Fig. S5 SEM images of the as-prepared Co9S8@Ni(OH)2

Hexagonal Prism-like Hierarchical Co9S8@Ni(OH)2 Core-

shell Nanotubes on Carbon Fibers for High-Performance

Asymmetric Supercapacitors

Fangfang Zhu,a Ming Yan,b Yu Liu,a,* Hao shen,a Yong Leic and Weidong Shia,*

a School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang,

212013, P. R. China.

b School of Material Science and Engineering, Jiangsu University, Zhenjiang, 212013,

P. R. China

c Institute of Physics & IMN MacroNano (ZIK), Ilmenau University of Technology,

Ilmenau 98693, Germany

* E-mail: [email protected]. Tel: +86-511-88791800

Keywords: supercapacitor; core-shell; nanotube arrays; asymmetric supercapacitor

Electronic Supplementary Material (ESI) for Journal of Materials Chemistry A.This journal is © The Royal Society of Chemistry 2017

mailto:[email protected]

Page 2: Fig. S3 SEM image of as-prepared hollow Co9S8 nanoneedles. Fig. S4 SEM images of the Co9S8 nanotubes synthesized at 150 ˚C for 10h. Fig. S5 SEM images of the as-prepared Co9S8@Ni(OH)2

Fig. S1 (a) XPS survey spectrum of the Co9S8@Ni(OH)2 core-shell nanotube arrays; (b) O 1s XPS

spectrum of the Co9S8@Ni(OH)2 electrode.

Fig. S2 SEM image of the precursor Co(CO3)0.35Cl0.20(OH)1.10•1.74H2O solid

nanoneedles on CFs.

Fig. S3 SEM image of as-prepared hollow Co9S8 nanoneedles.

Fig. S4 SEM images of the Co9S8 nanotubes synthesized at 150 ˚C for 10h.

Fig. S5 SEM images of the as-prepared Co9S8@Ni(OH)2 core-shell nanotube arrays at

different magnification.

Fig. S6 (a) CV curves of bare Co9S8 electrode at different scan rates; (b) GCD curves of

Co9S8 electrode at different current densities.

Page 5: Fig. S3 SEM image of as-prepared hollow Co9S8 nanoneedles. Fig. S4 SEM images of the Co9S8 nanotubes synthesized at 150 ˚C for 10h. Fig. S5 SEM images of the as-prepared Co9S8@Ni(OH)2

Fig. S7 (a) CV curves of the Co9S8//AC device collected in different voltage window; (b) CV

curves of the Co9S8//AC device at different scan rates in the operation window of 1.6 V; (e)

GCD curves of the ASC device measured at different current densities.

Page 6: Fig. S3 SEM image of as-prepared hollow Co9S8 nanoneedles. Fig. S4 SEM images of the Co9S8 nanotubes synthesized at 150 ˚C for 10h. Fig. S5 SEM images of the as-prepared Co9S8@Ni(OH)2

Fig. S8 (a) CV curves of Co9S8@Ni(OH)2 core-shell nanotubes obtained for different

exposition time: 0 s, 120 s, 240 s, 360 s, 420 s. (b) Discharge curves of the

Co9S8@Ni(OH)2 core-shell electrodes with different electrodeposition times. (c) The

plot of specific capacitance versus different deposition times for Co9S8@Ni(OH)2

electrodes at a current density of 1 A g-1. (d) The specific capacity of the electrodes

with different exposition time at different current densities.

Page 7: Fig. S3 SEM image of as-prepared hollow Co9S8 nanoneedles. Fig. S4 SEM images of the Co9S8 nanotubes synthesized at 150 ˚C for 10h. Fig. S5 SEM images of the as-prepared Co9S8@Ni(OH)2

Fig. S9 (a) CV curves of the AC electrode at different scan rates; (b) Galvanostatic charge-

discharge curves at different current densities.

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