Highly Flexible Graphene/Mn3O4 Nanocomposite Membrane as ...
Supporting Information for
Highly Flexible Graphene/Mn3O4 Nanocomposite Membrane as Advanced Anodes for Li-Ion Batteries Jian-Gan Wang †, Dandan Jin †, Rui Zhou †, Xu Li ‡, Xing-rui Liu †, Chao Shen †, Keyu Xie †, Baohua Li ‡, Feiyu Kang †
‡
, Bingqing Wei
†, §
*
Center for Nano Energy Materials, State Key Laboratory of Solidification Processing, School of
Materials Science and Engineering, Northwestern Polytechnical University, Xi’an 710072, China. ‡
Engineering Laboratory for Functionalized Carbon Materials and Shenzhen Key Laboratory for
Graphene-based Materials, Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, China §
Department of Mechanical Engineering, University of Delaware, Newark, DE19716, USA
*E-mail: [email protected]
1
Figure S1. Cross-section image of rGO/Mn3O4 nanocomposites.
2
Figure S2. Element mapping of rGO/Mn3O4 nanocomposites.
3
Figure S3. SEM image of Mn3O4 nanowires.
4
rGO
Intensity (a.u.)
GO
0
20
40
60
0
20
40
60
2 Theta (deg.) Figure S4. XRD patterns of GO and rGO.
5
Weight loss (wt.%)
100
80
32 wt.%
60
40
20
0
100
200
300
400
500
600
700
800
Temperature (°C) Figure S5. TGA curves of rGO/Mn3O4 nanocomposites.
6
Mn 3s Mn 3p 800
600
400
200
Experimental data Fitted curve sp2 C Defects C=O
Intensity (a.u.)
O 1s
Mn 2p
Intensity (a.u.) 1000
(b)
C 1s
(a)
288.1
Binding energy (eV)
660
Expermental data Fitted curve Mn 2p1/2
Mn 2p
Mn4+ 2p3/2 Mn2+ 2p3/2
11.9 eV
653.1
641.2 641.0
642.7
655
650
645
640
Binding energy (eV)
290
288
286
284
282
280
Binding energy (eV)
(d) Intensity (a.u.)
Intensity (a.u.)
(c)
C 1s
285.6
292
0
284.3
635
540
Experimental data Fitted curve H-O-H Mn-OH Mn-O-Mn
O 1s 530.9
529.9
532.5
538
536
534
532
530
528
526
Binding energy (eV)
Figure S6. XPS spectra of the nanocomposite: (a) survey spectrum, (b) C 1s, (c) Mn 2p and (d) O 1s.
7
mA g-1
2000
Potential (V vs. Li+/Li)
3.0
1000 500 200 100
2.5 2.0 1.5 1.0 0.5 0.0
0
200
400
600
-1
800
Specific capacity (mAh g ) Figure S7. Charge/discharge curves of rGO/Mn3O4 nanocomposites at different current densities.
8
Folding line
Bending nanowire
Figure S8. SEM images of rGO/Mn3O4 nanocomposite membrane after folding. The arrows indicate the folding line of the membrane (a) and the bending nanowire (b)
9
Highly Flexible Graphene/Mn3O4 Nanocomposite Membrane as Advanced Anodes for Li-Ion Batteries Jian-Gan Wang †, Dandan Jin †, Rui Zhou †, Xu Li ‡, Xing-rui Liu †, Chao Shen †, Keyu Xie †, Baohua Li ‡, Feiyu Kang †
‡
, Bingqing Wei
†, §
*
Center for Nano Energy Materials, State Key Laboratory of Solidification Processing, School of
Materials Science and Engineering, Northwestern Polytechnical University, Xi’an 710072, China. ‡
Engineering Laboratory for Functionalized Carbon Materials and Shenzhen Key Laboratory for
Graphene-based Materials, Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, China §
Department of Mechanical Engineering, University of Delaware, Newark, DE19716, USA
*E-mail: [email protected]
1
Figure S1. Cross-section image of rGO/Mn3O4 nanocomposites.
2
Figure S2. Element mapping of rGO/Mn3O4 nanocomposites.
3
Figure S3. SEM image of Mn3O4 nanowires.
4
rGO
Intensity (a.u.)
GO
0
20
40
60
0
20
40
60
2 Theta (deg.) Figure S4. XRD patterns of GO and rGO.
5
Weight loss (wt.%)
100
80
32 wt.%
60
40
20
0
100
200
300
400
500
600
700
800
Temperature (°C) Figure S5. TGA curves of rGO/Mn3O4 nanocomposites.
6
Mn 3s Mn 3p 800
600
400
200
Experimental data Fitted curve sp2 C Defects C=O
Intensity (a.u.)
O 1s
Mn 2p
Intensity (a.u.) 1000
(b)
C 1s
(a)
288.1
Binding energy (eV)
660
Expermental data Fitted curve Mn 2p1/2
Mn 2p
Mn4+ 2p3/2 Mn2+ 2p3/2
11.9 eV
653.1
641.2 641.0
642.7
655
650
645
640
Binding energy (eV)
290
288
286
284
282
280
Binding energy (eV)
(d) Intensity (a.u.)
Intensity (a.u.)
(c)
C 1s
285.6
292
0
284.3
635
540
Experimental data Fitted curve H-O-H Mn-OH Mn-O-Mn
O 1s 530.9
529.9
532.5
538
536
534
532
530
528
526
Binding energy (eV)
Figure S6. XPS spectra of the nanocomposite: (a) survey spectrum, (b) C 1s, (c) Mn 2p and (d) O 1s.
7
mA g-1
2000
Potential (V vs. Li+/Li)
3.0
1000 500 200 100
2.5 2.0 1.5 1.0 0.5 0.0
0
200
400
600
-1
800
Specific capacity (mAh g ) Figure S7. Charge/discharge curves of rGO/Mn3O4 nanocomposites at different current densities.
8
Folding line
Bending nanowire
Figure S8. SEM images of rGO/Mn3O4 nanocomposite membrane after folding. The arrows indicate the folding line of the membrane (a) and the bending nanowire (b)
9
