performance Supercapacitors Co S /G) …Co9S8 nanoflakes on Graphene (Co9S8/G) nanocomposites for...

Co9S8 nanoflakes on Graphene (Co9S8/G) nanocomposites for high

performance Supercapacitors

Rajendran Ramachandrana, Murugan Saranyaa, Chella Santhosha, Venugopal Velmurugana, Bala

P.C.Raghupathyb,*, Soon Kwan Jeongc,* and Andrews Nirmala Gracea,c,*

aCentre for Nanotechnology Research, VIT University, Vellore - 632 014, Tamil Nadu, India.

b Research & Advanced Engineering Division (Materials), Renault Nissan Technology &

Business Center India (P) Ltd., Chennai.

c Climate Change Technology Research Division, Korea Institute of Energy Research, Yuseong-

gu, Daejeon 305-343, South Korea.

* To whom correspondence should be addressed:

E-mail: balapraveen2000@yahoo.com; jeongsk@kier.re.kr; anirmalagrace@vit.ac.in.

Tel.: (+91) 416 2202412, (+82) 42 860 3367, Fax: (+91) 416 2243092, (+82) 42-860-3134.

Electronic Supplementary Material (ESI) for RSC Advances.This journal is © The Royal Society of Chemistry 2014

Fig. S1. Thermogravimetric TGA and DTA graph of graphene

Fig.S2. FE-SEM and mapping images of pure Co9S8

Fig.S3. FE-SEM and mapping images of graphene

Fig.S4. FE-SEM and mapping images of Co9S8/G-d

0 50 100 150 200 250 300 350-0.1

0.0

0.1

0.2

0.3

1.6 A g-1

1.8 A g-1

Time (sec)

Pote

ntia

l (V

) vs.

Ag/

AgC

l

Fig. S5.Galvanostatic charge/discharge behavior of Co9S8/G-d composite at different current densities.

Time (sec)

Pote

ntia

l (V

) vs.

Ag/

AgC

l

0 10 20 30 40 50-0.1

0.0

0.1

0.2

0.3

1.6 A g-1

1.8 A g-1

Fig. S6.Galvanostatic charge/discharge behavior of Co9S8/G-d composite at different current densities