Hierarchical sheet-like Ni–Co layered double hydroxide derived from a MOF template for high-performance supercapacitors

Cao, Fuyang; Gan, Mengyu; Ma, Li; Li, Xiurong; Yan, Fabing; Ye, Menghan; Zhai, Yanfang; Zhou, You

doi:10.1016/j.synthmet.2017.11.001

Cited by 91 publications

(27 citation statements)

References 45 publications

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“…CPE is Constant Phase Element, which is usually used to fit equivalent circuit. The cycling performance of 6 M-Ni(OH) 2 was further compared with that reported in the other relevant literatures (Figure 9f) [44][45][46][47][48][49][50]. It is clear that the synthesized 6 M-Ni(OH) 2 , subject to the longest cycle numbers, still exhibits an outstanding cycling stability when compared with those reported.…”

Section: Electrochemical Measurements Of Ni-mof and Ni(oh) 2 Samplesmentioning

confidence: 58%

The Evolution in Electrochemical Performance of Honeycomb-Like Ni(OH)2 Derived from MOF Template with Morphology as a High-Performance Electrode Material for Supercapacitors

Zhang

et al. 2020

Materials

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Ni(OH)2 derived from an MOF template was synthesized as an electrode material for supercapacitors. The electrochemical performance of the electrode was adjusted by effectively regulating the morphology of Ni(OH)2. The evolution of electrochemical performance of the electrode with morphology of Ni(OH)2 was highlighted in detail, based on which honeycomb-like Ni(OH)2 was successfully synthesized, and endowed the electrode with outstanding electrochemical performance. For the three-electrode testing system, honeycomb-like Ni(OH)2 exhibited a very high specific capacitance (1865 F·g−1 at 1 A·g−1, 1550 F·g−1 at 5 mV·s−1). Moreover, it also presented an excellent rate capability and cycling stability, due to 59.46 % of the initial value (1 A·g−1) being retained at 10 A·g−1, and 172% of initial value (first circle at 50 mV·s−1) being retained after 20,000 cycles. With respect to the assembled hybrid supercapacitor, honeycomb-like Ni(OH)2 also displayed superior electrochemical performance, with a high energy density (83.9 Wh·kg−1 at a power density of 374.8 W·kg−1). The outstanding electrochemical performance of Ni(OH)2 should be attributed to its unique honeycomb-like structure, with a very high specific surface area, which greatly accelerates the transformation and diffusion of active ions.

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Section: Electrochemical Measurements Of Ni-mof and Ni(oh) 2 Samplesmentioning

confidence: 58%

The Evolution in Electrochemical Performance of Honeycomb-Like Ni(OH)2 Derived from MOF Template with Morphology as a High-Performance Electrode Material for Supercapacitors

Zhang

et al. 2020

Materials

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“… 20 A band at 1632 cm −1 is identified as the O–H bending vibration of the adsorbed water molecules in the LDHs. 21 Peaks at 1349 and 998 cm −1 correspond to the N–O ( υ 3 and bending) vibration of the adsorbed NO 3 − ions (interlayer anion) which is from the precursor solution used in the preparation of LDHS. 20 The peaks below 800 cm −1 are identified as the stretching and bending vibrations of the metal–oxygen (Ni–O–H and Co–O–H) in the hydrotalcite-like lattice.…”

Section: Resultsmentioning

confidence: 99%

A simple strategy to prepare a layer-by-layer assembled composite of Ni–Co LDHs on polypyrrole/rGO for a high specific capacitance supercapacitor

et al. 2019

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A facile and novel electrode material of nickel-cobalt layered double hydroxides (Ni-Co LDHs) layered on polypyrrole/reduced graphene oxide (PPy/rGO) is fabricated for a symmetrical supercapacitor via chemical polymerization, hydrothermal and vacuum filtration. This conscientiously layered composition is free from any binder or surfactants which is highly favorable for supercapacitors. The PPy/rGO serves as an ideal backbone for Ni-Co LDHs to form a free-standing electrode for a high-performance supercapacitor and enhanced the overall structural stability of the film. The well-designed layered nanostructures and high electrochemical activity from the hexagonal-flakes like Ni-Co LDHs provide large electroactive sites for the charge storage process. The specific capacitance (1018 F g À1 at 10 mV s À1 ) and specific energy (46.5 W h kg À1 at 464.9 W kg À1 ) obtained for the PPy/rGO|Ni-Co LDHs symmetrical electrode in the current study are the best reported for the two-electrode system for PPy-and LDHs-based composites.The outstanding performance in the prepared LBL film is a result of the LBL architecture of the film and the combined effect of redox reaction and electrical double layer capacitance.

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“…The band at 1383 cm À1 is assigned to the vibration of interlayer CO 3 2À and NO 3 À anions. 33 The FTIR spectrum of g-C 3 N 4 shows a broad absorption peak at 3000-3600 cm À1 attributed to the stretching vibrations of N-H groups. The typical stretching modes of CN heterocycles are observed in the range of 1200-1650 cm À1 , while the absorption at 810 cm À1 is assigned to tri-s-triazine, i.e., to the breathing mode of triazine.…”

Section: Xrdmentioning

confidence: 99%

Scalable nanohybrids of graphitic carbon nitride and layered NiCo hydroxide for high supercapacitive performance

2019

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Hierarchical sheet-like Ni–Co layered double hydroxide derived from a MOF template for high-performance supercapacitors

Cited by 91 publications

References 45 publications

The Evolution in Electrochemical Performance of Honeycomb-Like Ni(OH)2 Derived from MOF Template with Morphology as a High-Performance Electrode Material for Supercapacitors

The Evolution in Electrochemical Performance of Honeycomb-Like Ni(OH)2 Derived from MOF Template with Morphology as a High-Performance Electrode Material for Supercapacitors

A simple strategy to prepare a layer-by-layer assembled composite of Ni–Co LDHs on polypyrrole/rGO for a high specific capacitance supercapacitor

Scalable nanohybrids of graphitic carbon nitride and layered NiCo hydroxide for high supercapacitive performance

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