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Supporting information

Construction of MOF-derived hollow Ni-Zn-Co-S nanosword

arrays as binder-free electrodes for asymmetric supercapacitors

with high energy density

Youzhang Huang,a Liang Quan,a Tianqing Liu,a Qidi Chen,a Daoping Cai,a* and

Hongbing Zhana,b*

a College of Materials Science and Engineering, Fuzhou University, Fujian 350108,

China.

b Key Laboratory of Eco-materials Advanced Technology, Fuzhou University, Fujian

350108, China.

*Corresponding author: Daoping Cai and Hongbing Zhan.

E–mail address: dpcai@fzu.edu.cn; hbzhan@fzu.edu.cn.

Tel.: +86-591-22866532; Fax: +86-591-22866539.

Electronic Supplementary Material (ESI) for Nanoscale.This journal is © The Royal Society of Chemistry 2018

2

Figure S1. Optical image of the pristine NF, Zn-Co-ZIF NSAs and Ni-Zn-Co-S NSAs on NF.

Figure S2. XRD pattern of the Zn-Co-ZIF-0.33 NSAs.

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Figure S3. EDS analyses of the Ni-Co-S, Ni-Zn-Co-S-0.25, Ni-Zn-Co-S-0.33 and Ni-Zn-Co-S-

0.50 NSAs.

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Figure S4. SEM images of the (a-c) Co-ZIF, Zn-Co-ZIF-0.25 and Zn-Co-ZIF-0.50 NSAs on NF,

(d-f) corresponding hollow Ni-Co-S, Ni-Zn-Co-S-0.25 and Ni-Zn-Co-S-0.50 NSAs on NF at

different magnifications.

Figure S5. The pore size distribution of the hollow Ni-Zn-Co-S-0.33 NSAs scraped down from

NF.

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Figure S6. XRD patterns of the Ni-Co-S, Ni-Zn-Co-S-0.25, Ni-Zn-Co-S-0.33 and Ni-Zn-Co-S-

0.50 NSAs scratched down from NF.

Figure S7. CV curves of pristine NF and Ni-Zn-Co-S-0.33 NSA/NF electrode at a scan rate of 10

mV s−1.

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Figure S8. CV and GCD curves of the (a, d) Ni-Co-S NSAs/NF, (b, e) Ni-Zn-Co-S-0.25

NSAs/NF and (c, f) Ni-Zn-Co-S-0.50 NSAs/NF electrodes.

Figure S9. SEM images and EDS analyses of the (a, c) Ni-Zn-Co-S-0.33 NSAs/NF and (b, d)

Bi2O3/NF electrodes after cycling.

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Figure S10. EDS results of the Ni-Zn-Co-S-0.33 NSAs at the (a) 50th, (b) 100th and (c) 250th

cycles.

Figure S11. XRD pattern of the Ni-Zn-Co-S-0.33 NSAs/NF after cycling.

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Working electrode Morphology Electrolyte Stability Reference

Bi2O3/NF Nanosheets 3 M KOH 87 % (1000 cycles) This work

Bi2O3/T-NT Cluster 1 M NaOH 75% (500 cycles) (1)

ESCNF@Bi2O3 Nanosheets 1 M KOH 87% (2000 cycles) (2)

Bi2O3 Rods 6 M KOH 62% (1000 cycles) (3)

Bi2O3 3D hierarchical 6 M KOH 56% (500 cycles) (4)

Bi2O3/activated

carbon

Floccular 6 M KOH 59%（1000 cycles） (5)

Bi2O3/activated

carbon

Nanoparticles 6 M KOH 80% （750 cycles） (6)

Bi2S3/RGO Uniform flake 2 M KOH 75%（100 cycles） (7)

Bi2O3–NF Flower-type 6 M KOH 85%（2000 cycles） (8)

Table S1. Comparison of the electrochemical performance of other reported Bi2O3-based negative

electrode materials for supercapacitors.

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Reported ASC Device ElectrolyteEnergydensity[Wh kg–

1]

PowerDensity[W kg–1]

References

Ni-Zn-Co-S-0.33/NF//Bi2O3/NF 3 M KOH 91.7 458 This work

Co9S8-NSA//AC 1 M KOH 20 828.5 (9)

Zn0.76Co0.24S/NGN/CNTs//NGN/CNTs

6 M KOH 50.2 750 (10)

NiCo2S4/CT//AC 6 M KOH 40.1 451 (11)

Co3O4//carbon 6 M KOH 36 800 (12)

CC/CNF/Ni−Co LDH//CC/CNF/Bi2O3

3 M KOH 88.1 440 (13)

NiCo2O4/MnO2//AC 1 M KOH 37.5 187.5 (14)

Ni3S2//graphene 2 M KOH 19.8 798 (15)

NiCo2O4@MnO2

//AC1 M NaOH 35 163 (16)

NiCo2O4//AC 1 M KOH 15.5 1000 (17)

CoMoO4//AC 2 M KOH 37.25 900 (18)

Table S2. Comparison of the electrochemical performance of other reported ASC devices.

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