Electronic Supplementary Information

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

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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

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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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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