Hierarchical NiCo 2 O 4 @Co-Fe LDH core-shell nanowire arrays for high-performance supercapacitor

Chen, Wenqiang; Wang, Jiao; Ma, KeYuan; Li, M.; Guo, Songhao; Liu, F.; Cheng, J.P.

doi:10.1016/j.apsusc.2018.04.254

Cited by 209 publications

(45 citation statements)

References 44 publications

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“…It is found by the calculation that the ASC device can achieve a high energy density of 35.4 Wh kg À 1 when the power density is 800.0 W kg À 1 (Figure 8f). Compared to the previous reports, such as MnOOH/NiAl-LDH// activated carbon (AC) ASC (26.89 Wh kg À 1 at 800 W kg À 1 ), [11] NiCo 2 S 4 //AC ASC (24.78 Wh kg À 1 at 1770.13 W kg À 1 ), [31c] NiCo 2 O 4 @CoÀ Fe LDH//AC (28.94 Wh kg À 1 at 950 W kg À 1 ) [38] and NiÀ MOF//AC (31.5 Wh kg À 1 at 800 W kg À 1 ), [13a] the ASC in our work is more competitive. What's more, the practical application of the AC//NiAl-LDH-0.5/NiÀ MOF/S10 ASC has been further evaluated, as shown in the inset of Figure 8f.…”

Section: Resultsmentioning

confidence: 53%

Sulfidation of Hierarchical NiAl−LDH/Ni−MOF Composite for High‐Performance Supercapacitor

Zheng¹,

Sun²,

Xu³

et al. 2019

ChemElectroChem

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Designing nanocomposites with good electrochemical properties is the key to studying electrode materials for supercapacitors. In this paper, we report a well‐defined composite (NiAl‐LDH/Ni−MOF/S) prepared in three steps. After the synthesis of LDH nanoplates through a hydrothermal method, the MOF nanosheets were grown on its surface by in situ nucleation. In this procedure, the synergistic effect of MOF and LDH will improve the specific capacitance. Afterwards, the composite was subjected to a sulfidation treatment to enhance its electrical conductivity. Consequently, the NiAl‐LDH/Ni−MOF/S has an excellent specific capacitance (1670 F g−1 at 1 A g−1) and rate capability (65 % from 1 to 30 A g−1). Moreover, an asymmetric supercapacitor (ASC) was assembled with NiAl‐LDH/Ni−MOF/S as cathode and activated carbon as anode. The ASC displays a maximum energy density (35.4 Wh kg−1) and outstanding cycle stability (retention of 96.4 % after 10000 cycles at 10 A g−1), demonstrating the potential of the electrode for use in high‐efficiency electrochemical capacitors.

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Section: Resultsmentioning

confidence: 53%

Sulfidation of Hierarchical NiAl−LDH/Ni−MOF Composite for High‐Performance Supercapacitor

Zheng¹,

Sun²,

Xu³

et al. 2019

ChemElectroChem

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“…Reagent Co., Ltd., Shanghai, China. The synthesis of 1D NiCo 2 O 4 nanowire films on nickel foam as a substrate (NiCo 2 O 4 @Ni) was carried out by the hydrothermal method and calcination at 300 °C, as we previously reported [43]. The subsequent growth of 2D MnO 2 nanoflakes on NiCo 2 O 4 nanowires as backbones was performed by a facile electrodeposition technique.…”

Section: Methodsmentioning

confidence: 99%

“…A hybrid capacitor with MnO 2 @NiCo 2 O 4 @Ni as the positive electrode and AC@Ni as the negative electrode was assembled. The performances were measured in a two-electrode assembly in 2 M KOH as the electrolyte [43]. The specific surface area of AC is about 780 m 2 ·g −1 .…”

Section: Methodsmentioning

confidence: 99%

The Synthesis of NiCo2O4–MnO2 Core–Shell Nanowires by Electrodeposition and Its Supercapacitive Properties

et al. 2019

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Hierarchical composite films grown on current collectors are popularly reported to be directly used as electrodes for supercapacitors. Highly dense and conductive NiCo2O4 nanowires are ideal backbones to support guest materials. In this work, low crystalline MnO2 nanoflakes are electrodeposited onto the surface of NiCo2O4 nanowire films pre-coated on nickel foam. Each building block in the composite films is a NiCo2O4–MnO2 core–shell nanowire on conductive nickel foam. Due to the co-presence of MnO2 and NiCo2O4, the MnO2@NiCo2O4@Ni electrode exhibits higher specific capacitance and larger working voltage than the NiCo2O4@Ni electrode. It can have a high specific capacitance of 1186 F·g−1 at 1 A·g−1. When the core–shell NiCo2O4–MnO2 composite and activated carbon are assembled as a hybrid capacitor, it has the highest energy density of 29.6 Wh·kg−1 at a power density of 425 W·kg−1 with an operating voltage of 1.7 V. This work shows readers an easy method to synthesize composite films for energy storage.

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“…[4][5][6][7] Currently,t he most effective and feasible way to improve the performance of SCs is to prepare hybrid electrode with high specific capacitance. [2] Recently,t ransition metal (Ni, [8][9][10] Co, [11][12][13] Fe, [14,15] Mn, [16] Zn, [17,18] etc.) sulfides have been used widely as electrode materials for electrochemical SCs due to their excellent properties, including low toxicity, low maintenancec osts, and excellent theoretical capacity (> 10 3 Fg À1 ).…”

Section: Introductionmentioning

confidence: 99%

Zn–Co Sulfide Microflowers Anchored on Three‐Dimensional Graphene: A High‐Capacitance and Long‐Cycle‐Life Electrode for Asymmetric Supercapacitors

Deng

Tian

Wang

et al. 2019

Chemistry A European J

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Zinc-cobalt double-metal sulfides (ZCS) as Faradic electrode materials with high energy density have great potential fors upercapacitors, but their poor transfer efficiency for electrons and ions hinders their electrochemical response.H erein, ZnCo 2 (CO 3 ) 1.5 (OH) 3 @ZCS microflower hybrid arrays consisting of thin nanolayer petals were anchored on three-dimensional graphene (ZnCo 2 (CO 3 ) 1.5 (OH) 3 @ZCS/3DG) by as imple hydrothermal method and additional ion-exchangep rocess. AZ nCo 2 (CO 3 ) 1.5 (OH) 3 @ZCS/3DG electrode delivered high capacitance (2228 Fg À1 at 1Ag À1 )a nd long cycling life (85.7 %r etention after 17 000 cycles), which are ascribedt ot he multicomponents tructural design. The 3DGconductive substrate improves the electron-transfer dynamics of the electrode material. Meanwhile, the microflowers consisting of thin nanolayer petals could not only provide many actives ites for ions to improve thec apacitance, but also alleviate the volumee xpansion to ensure the structural stability. Furthermore,a na ll-solid-state asymmetric supercapacitor based on aZ nCo 2 (CO 3 ) 1.5 (OH) 3 @ZCS/3DG electrode achieved ah igh energy density of 27 Whkg À1 at 528.3 Wkg À1 ande xhibits exceptional cyclic stability for 23 000 cycles. Its ability to light ab lue LED for 9min verified the feasibility of its applicationf or energy storagedevices.[a] Q. Figure 3. a) XRD pattern of ZnCo 2 (CO 3 ) 1.5 (OH) 3 @ZCS powder,b)Raman spectrum of ZnCo 2 (CO 3 ) 1.5 (OH) 3 @ZCS/3DG,c )XPS full spectrum of ZnCo 2 (CO 3 ) 1.5 (OH) 3 @ZCS/3DG,d -f) Zn 2p, Co 2p, and S2 ph igh-resolution XPS spectra, respectively.

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Hierarchical NiCo 2 O 4 @Co-Fe LDH core-shell nanowire arrays for high-performance supercapacitor

Cited by 209 publications

References 44 publications

Sulfidation of Hierarchical NiAl−LDH/Ni−MOF Composite for High‐Performance Supercapacitor

Sulfidation of Hierarchical NiAl−LDH/Ni−MOF Composite for High‐Performance Supercapacitor

The Synthesis of NiCo2O4–MnO2 Core–Shell Nanowires by Electrodeposition and Its Supercapacitive Properties

Zn–Co Sulfide Microflowers Anchored on Three‐Dimensional Graphene: A High‐Capacitance and Long‐Cycle‐Life Electrode for Asymmetric Supercapacitors

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