a facile route to synthesize multiporous mnco 2o4 and …a facile route to synthesize multiporous...
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A Facile Route to Synthesize Multiporous MnCo2O4 and CoMn2O4 Spinel Quasi-Hollow Spheres with Improved Lithium Storage Properties
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Jingfa Li, Shenglin Xiong,* Xiaowei Li, and Yitai Qian
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Figure S1. Low and high magnification FESEM images of the Mn0.33Co0.67CO3 (a,b) and Co0.33Mn0.67CO3 (c,d)
precursors synthesized in distilled water at 200 °C for 20 h. 20
25
30
a
d
b
c
2μm
2μm 400 nm
400 nm
Electronic Supplementary Material (ESI) for NanoscaleThis journal is © The Royal Society of Chemistry 2013
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Figure S2. Low and high magnification FESEM images of the Mn0.33Co0.67CO3 (a,b) and Co0.33Mn0.67CO3 (c,d)
precursors synthesized solvothermally at 180 °C for 20 h.
20
25
a b
c d
6μm 2μm
2μm 200 nm
Electronic Supplementary Material (ESI) for NanoscaleThis journal is © The Royal Society of Chemistry 2013
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Figure S3. Low and high magnification FESEM images of the Mn0.33Co0.67CO3 (a,b) and Co0.33Mn0.67CO3 (c,d)
precursors synthesized solvothermally at 220°C for 20 h.
20
a b
dc
1μm 200 nm
2μm 400 nm
Electronic Supplementary Material (ESI) for NanoscaleThis journal is © The Royal Society of Chemistry 2013
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Figure S4. EDX spectrum of the MnCo2O4 (a) and CoMn2O4 (b) hollow microspheres.
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0.00 1.00 2.00 3.00 4.00 5.00 6.00 7.00 8.00 9.00 10.00
1 2
0
150
300
450
600
750
900
1050
1200
1350
1500
1650
1800CK
aOKaCr
LlCr
La
CrKa
CrKbMn
LlMn
La
MnKa
MnKb
CoLl
CoLa
CoKa
CoKb
CuLl
CuLa
CuKa
CuKb
0.00 1.00 2.00 3.00 4.00 5.00 6.00 7.00 8.00 9.00 10.00
2 1
0
500
1000
1500
2000
2500
3000
3500
4000
4500
5000
5500
6000
CKa
OKa
MnLl
MnLa
MnKa
MnKbCo
LlCo
La
CoKa
CoKb
CuLl
CuLa
CuKa
CuKb
a
KeV
KeV
Cou
nts
Cou
nts
b
Electronic Supplementary Material (ESI) for NanoscaleThis journal is © The Royal Society of Chemistry 2013
Table S1.The ratio of Co(II)/Co(III) and Mn(II)/Mn(III) in the products based on the area of peaks
after a Gaussian fitting method .
Composite
the ratio of
Co(II)/Co(III)
the ratio of
Mn(II)/Mn(III)
the ratio of
O/M
MnCo2O4 0.81 1.70 1.36
CoMn2O4 2.30 0.36 1.51
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20
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Figure S5. FESEM images of the electrode made of MnCo2O4 (a,b) and CoMn2O4 (c,d) after 100 cycles testing at 30
400 mA g-1, respectively.
35
a b
400 nm 1μm
dc
200 nm 1μm
Electronic Supplementary Material (ESI) for NanoscaleThis journal is © The Royal Society of Chemistry 2013
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Figure S6. Rate performance of MnCo2O4 (S1) and CoMn2O4 (S2) electrodes.
45
50
Dis
char
ge c
apac
ity (m
A h
g-1
)
Cycle
Electronic Supplementary Material (ESI) for NanoscaleThis journal is © The Royal Society of Chemistry 2013