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Electronic Supplementary Information
One-pot synthesis of nickel-cobalt hydroxyfluorides nanowires
with ultrahigh energy density for an asymmetric supercapacitor
Jian-Fang Zhang,a Yan Wang,a,b,* Xia Shu,a Cui-Ping Yu,a Ming-Feng Xiaoa, Jie-Wu
Cui,a Yong-Qiang Qin,a Hong-Mei Zheng,a Yong Zhang,a Dong Chen,c Pulickel M.
Ajayan,b Yu-Cheng Wua, d, *
aSchool of Materials Science and Engineering, Hefei University of Technology, Hefei
230009, China
bDepartment of Material Science and Nanoengineering, Rice University, Houston,
Texas 77005, USA
cSchool of Instrument Science and Opto-electronics Engineering, Hefei University of
Technology, Hefei 230009, China
dKey Laboratory of Advanced Functional Materials and Devices of Anhui Province,
Hefei 230009, China.
*Corresponding authors
Email: [email protected] (Y. Wang); [email protected] (Y. C. Wu)
Fig. S1 EDS spectra of (a) Ni-HF, (b) Co-HF and (c) NiCo-HF
Fig. S2 XPS of NiCo-HF: (a) Survey, (b) Co 2p, (c) Ni 2p and (d) F 1s spectrum
Fig. S3 Nitrogen adsorption-desorption isotherm and the corresponding pore-size distribution curves of (a,b) Ni-HF, (c,d) Co-HF and (e,f) NiCo-HF
Fig. S4 Nitrogen adsorption-desorption isotherm and the corresponding pore-size distribution curves of NiCo-HF prepared at different temperatures of (a,b) 120, (c,d)
160, (e,f) 180°C
Fig. S5 EDS spectra of NiCo-HF prepared at different temperatures of (a,b) 120, (c,d) 160, (e,f) 180°C
Fig. S6 CV curves of (a) Ni-HF electrode, (b) Co-HF electrode at scan rates range from 2 to 100 mV s-1, GCD curves of (c) Ni-HF electrode, (d) Co-HF electrode at
current densities range from 1 to 20 A g-1.
Fig. S7 CV curves of NiCo-HF electrodes prepared at different temperatures of (a) 120, (b) 160, (c) 180 ℃; (d) Compared CV curves of different NiCo-HF electrodes at a scan rate of 50 mV s-1.
Fig. S8 Cycling performance of the NiCo-HF electrode at a scan rate of 20 mVs-1 for 10000 cycles, the inset shows the CV curves after different cycles
Fig. S9 GCD curves of NiCo-HF//AC asymmetric supercapacitor for the first and last 10 cycles during the stability test for 10000 cycles
Fig. S10 Optical photograph of 3 white and blue colored LEDs lit by two charged supercapacitors connected in series for 5 min.
Table S1. Comparison of the energy density and power density of NiCo-HF//AC asymmetric supercapacitor with other reports in the literatures.
Materials Energy density (Wh kg-1)
Power density(W kg-1) Ref.
NiCo-HF//AC 86.3 379.4 This work
CoS@eRG//AC 29 800 S1NiCo2S4@Co(OH)2//AC 35.89 400 S2
NiCo2S4//AC 35.6 819.5 S3
Nickel cobalt hydroxide nanoflowers 19.4 80.5 S4
Cobalt-manganese layered double hydroxide 4.4 2500 S5
MnO2/graphene 10.7 500 S6Ni3S2@-NiS//AC 55.1 925.9 S7
MnMoO4·nH2O//AC 31.6 935 S8
graphene@Mn3O4 nanosheets 50 64000 S9
NiFe2O4 nanocones forest 54.9 300 S10
References
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