Ultrathin nanoflakes of cobalt–manganese layered double hydroxide with high reversibility for asymmetric supercapacitor

Jagadale, Ajay D.; Guan, Guoqing; Li, Xiumin; Du, Xiaoze; Ma, Xuli; Hao, Xiaogang; Abudula, Abuliti

doi:10.1016/j.jpowsour.2015.12.097

Cited by 273 publications

(83 citation statements)

References 44 publications

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“…The sample of 1:0 molar ratio was corresponding to the plane of Ni 3 (NO 3 ) 2 (OH) 4 . The comparison of XRD patterns of the different electrodes indicated a gradual transformation of crystal structure from Ni 3 (NO 3 ) 2 (OH) 4 to NiCo LDH phase and then to Co 2 (OH) 3 NO 3 phase, and the (003) phase of NiCo LDH shifted to low degree which indicated NiCo LDH materials had a extend interlamellar spacing than Ni 3 (NO 3 ) 2 (OH) 4 materials .…”

Section: Resultsmentioning

confidence: 99%

“…Up to now, many LDHs such as CoMn, NiAl, CoAl, NiMn and NiCo have been investgated as promising electroactive materials for supercapacitors . Among these materials, NiCo LDH was regarded as an excellent electroactive material attributed to its flexible ion exchange property, good redox activity, low cost, and environmentally friendly nature .…”

Section: Introductionmentioning

confidence: 99%

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Controllable Synthesis of NiCo LDH Nanosheets for Fabrication of High‐Performance Supercapacitor Electrodes

Wang

et al. 2017

Electroanalysis

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A unipolar pulse electrodeposition method was employed to controllably synthesize nanosheet type NiCo LDH. The effect of concentration rate of Ni(NO3)2/Co(NO3)2 preparation solution on crystalline structure, morphology and supercapacitive performance was investigated systematically. Experimental found that the morphology and composition of NiCo LDH was highly depend on the Ni2+/Co2+ molar ratios of preparation solution; and the obtained Ni0.76Co0.24 LDH materials showed small nanosheet size and uniform distribution on carbon fiber electrode. Ni0.76Co0.24 LDH electrode was evaluated for supercapacitor application, which revealed a high specific capacitances of 2189.8 and 1908.8 F g−1 at the current density of 1 and 30 A g−1 respectively and a good cycle stability, retaining 70.3 % of the initial capacitance after 20000 charge and discharge cycles at 50 A g−1. Moreover, the Ni0.76Co0.24 LDH electrode exhibits a high energy density of 76 Wh Kg−1 at a power density of 250 W Kg−1 and a high power density of 7500 W Kg−1 at energy density of 66 Wh Kg−1. The as‐prepared Ni0.76Co0.24 LDH as positive electrode for asymmetric supercapacitor exhibits excellent energy density of 4.1 Wh Kg‐1 at a power density of 4000 W Kg‐1

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Controllable Synthesis of NiCo LDH Nanosheets for Fabrication of High‐Performance Supercapacitor Electrodes

Wang

et al. 2017

Electroanalysis

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112

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“…According to the nucleation kinetics, this will cause different nucleation induction time, a wider particle‐size distribution, and a smaller specific surface area. In addition, the molar ratio of cobalt to manganese has a great influence on the formation of the CoMn‐LDH structure . The heterogeneous micromixing will form different microstructures, and the sample miscellaneous phase increases, which seriously affects its electrochemical performance.…”

Section: Introductionmentioning

confidence: 99%

Impinging Stream–Rotating Packed‐Bed Reactor Combination Coprecipitation Synthesis of Cobalt–Manganese‐Layered Double Hydroxide for Electrode Materials

et al. 2019

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This article is a study of a novel method for the preparation of cobalt–manganese layered double hydroxide (CoMn‐LDH). An impinging stream–rotating packed‐bed (IS–RPB) reactor is used with a coprecipitation method to prepare CoMn‐LDH. The results show that the IS–RPB reactor has a good strengthening effect on the physical and electrochemical properties of CoMn‐LDH. Compared with CoMn‐LDH prepared by a traditional stirred reactor, the sample prepared by IS–RPB has smaller particle size (187.9 nm), larger specific surface area (92.5 m2 g−1), higher specific capacitance (1477 F g−1 at 1 A g−1), better rate capability (70.2% retention at 5 A g−1), and longer cycling life. All in all, this work provides a means to continuously prepare CoMn‐LDH electrode materials with outstanding performance.

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“…After the power density increased to 15.58 kW/kg, the energy density can still retain 30.30 Wh/kg, indicating high power performance of the asymmetric supercapacitor so as to promising applications for energy storage. Besides, The P‐Ni x Co 9‐x S 8 //AC ASC emerges considerably higher energy density than the NiCo 2 S 4 @Co(OH) 2 core‐shell nanotube arrays on Ni foam, NiCo layered double Hydroxides and cobalt‐manganese layered double hydroxide . In addition, The cycling performance of the ASC was also investigated at a current density of 10 A/g by repeated charge‐discharge test.…”

Section: Resultsmentioning

confidence: 99%

One‐Step Solvothermal Synthesis of 3D Hierarchical Ni_xCo_9‐xS₈ Structures for High‐Performance Supercapacitors

et al. 2017

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Three‐dimensional flowerlike NixCo9‐xS8 nanosheets with polyvinyl pyrrolidone as the agent dictating the material morphology have been synthesized by means of a one‐step solvothermal synthesis procedure. The synthetically facile 3D NixCo9‐xS8 nanosheets (P‐NixCo9‐xS8) achieve high specific surface area and outstanding electrochemical performance. When applied as an electrode material, it demonstrates excellent specific capacitance of 1319.76 F g−1 at 1 A g−1, and good rate performance of 1040.4 F g−1 at 20 A g−1. Also, the material achieves remarkable cycling stability that still retains 93.7 % of max capacity after 1500 cycles at the high current density of 10 A g−1. Even after 4000 cycles, a maximum capacity of 71.2 % is retained. Additionally, the P‐NixCo9‐xS8//AC asymmetric supercapacitor (ASC) prepared exhibits excellent capacitive performance with a high specific capacitance (119.9 F g−1), high energy density (43.80 Wh kg−1 at 821.25 W kg−1) and high power density (30.30 Wh kg−1 at 15.58 kW kg−1).

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Ultrathin nanoflakes of cobalt–manganese layered double hydroxide with high reversibility for asymmetric supercapacitor

Cited by 273 publications

References 44 publications

Controllable Synthesis of NiCo LDH Nanosheets for Fabrication of High‐Performance Supercapacitor Electrodes

Controllable Synthesis of NiCo LDH Nanosheets for Fabrication of High‐Performance Supercapacitor Electrodes

Impinging Stream–Rotating Packed‐Bed Reactor Combination Coprecipitation Synthesis of Cobalt–Manganese‐Layered Double Hydroxide for Electrode Materials

One‐Step Solvothermal Synthesis of 3D Hierarchical Ni_xCo_9‐xS₈ Structures for High‐Performance Supercapacitors

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Ultrathin nanoflakes of cobalt–manganese layered double hydroxide with high reversibility for asymmetric supercapacitor

Cited by 273 publications

References 44 publications

Controllable Synthesis of NiCo LDH Nanosheets for Fabrication of High‐Performance Supercapacitor Electrodes

Controllable Synthesis of NiCo LDH Nanosheets for Fabrication of High‐Performance Supercapacitor Electrodes

Impinging Stream–Rotating Packed‐Bed Reactor Combination Coprecipitation Synthesis of Cobalt–Manganese‐Layered Double Hydroxide for Electrode Materials

One‐Step Solvothermal Synthesis of 3D Hierarchical NixCo9‐xS8 Structures for High‐Performance Supercapacitors

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One‐Step Solvothermal Synthesis of 3D Hierarchical Ni_xCo_9‐xS₈ Structures for High‐Performance Supercapacitors