Synthesis of reduced graphene oxide nanoscrolls embedded in polypyrrole matrix for supercapacitor applications

Priyanka Atri a, Dinesh Chandra Tiwari a*, Rishi Sharma b

a School of Studies in Physics, Jiwaji University, Gwalior-474011, M.P., India

b MEMS and Microsensors Group, CSIR-Central Electronics Engineering Research Institute (CEERI), Pilani-333031, Raj., India

Corresponding Authors

Prof. Dinesh Chandra TiwariSchool of Studies in PhysicsJiwaji University, Gwalior (M.P.)IndiaEmail: dctiwari2001@yahoo.comTel. No.: +91-751-2442756 (O)

Fig. S1. EDX elemental analysis of rGO was performed during TEM analysis.

(S1)

Table S1. EDX elemental composition of rGO of Fig. S1.

Element Wt% At%

C (K) 99.74 99.80

O (K) 00.25 00.19

(a)

(b)

Fig. S2 (a-d). FESEM images of PPy-rGO scrolls at different magnifications indicating the rGO scrolls of different dimensions embedded into the PPy matrix.

(c)

(d)

Fig. S3. EDX elemental spot analysis on rGO nanoscrolls embedded in PPy matrix of PPy-rGO nanoscroll composite performed during FEG-SEM analysis.

Fig. S4. EDX elemental spot analysis on PPy matrix of PPy-rGO nanoscrolls composite performed during FEG-SEM analysis.

Fig. S-5 and S-6. TEM image of PPy-rGO shows the rGO nanoscrolls embedded into the PPy, encircled portion of the image S5 at higher magnification is shown in Fig. 4(b).

(S5)

(S6)

Fig. S7. UV-Vis spectra of chemically synthesized rGO.

180 280 380 480 580 680 7800.07

0.09

0.11

0.13

0.15

0.17

0.19

Wavelength (nm)

Ab%

Fig. S8. UV-Vis spectra of PPy-rGO nanoscrolls composite (Sample-1).

Wavelength (nm)

Fig. S9. FTIR spectra of PPy and PPy-rGO nanoscroll (Sample-1).