Strongly coupled hybrid ZnCo2O4 quantum dots/reduced graphene oxide with high-performance lithium storage capability

Yao, Wei; Dai, Yawen; Kang, Ge; Luo, Juhua; Shi, Qingle; Xu, Jianguang

doi:10.1016/j.electacta.2016.06.002

Cited by 21 publications

(7 citation statements)

References 57 publications

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“…By subtracting the mass of zinc from the net dry weight of the composite, the GQD content was obtained. If we continue the TGA experiment beyond 450 °C, there is weight gain observed due to oxidation of zinc that results in ZnO. − …”

Section: Resultsmentioning

confidence: 99%

Composite of Zinc Using Graphene Quantum Dot Bath: A Prospective Material For Energy Storage

Protich

Wong

Santhanam

2016

ACS Sustainable Chem. Eng.

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The electrodeposition of a zinc–graphene composite has been achieved for the first time using a graphene quantum dot (GQD) electrode. At the GQD electrode, the electrochemical reduction of zinc ion is shifted to a lesser negative potential with the complementary anodic peak due to the oxidation of the composite shifted toward a positive potential as compared to zinc ion reduction in the GQD bath. The charge ratio of anodic to cathodic peaks is one that represents a gain of nearly ten percent over the conventional Zn/Zn2+ in the energy storage systems. In galvanostatic electrolysis, the deposition of zinc–graphene composite is carried out under neutral and acidic conditions. The X-ray diffraction of the electrolytically prepared composite shows distinct features of 2 theta reflection at 8° due to (001) plane of graphene, in addition to the characteristic reflections at 38.9°,43.2°, 54.3°, 70.1° and 90° arising from Zn at (002), (100), (101), (102) and (110). A large scale preparation of the zinc–graphene composite has been achieved with a zinc plate as the working electrode in the GQD bath. The thermogravimetric analysis (TGA) of the composite shows a distinct weight loss that is due to breakdown of the composite. The interaction of GQD with zinc ion has been examined by fluorescence spectroscopy that shows quenching of the fluorescence of GQD. Scanning electron microscopy and energy dispersion X-ray analysis (EDAX) shows a string-like structure with peaks for carbon and zinc in EDAX. The electrochemical data on zinc/zinc–graphene composite reveals that it functions ideally as a charge storage material. Contact angle measurements reveal it to have hydrophilicity.

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Section: Resultsmentioning

confidence: 99%

Composite of Zinc Using Graphene Quantum Dot Bath: A Prospective Material For Energy Storage

Protich

Wong

Santhanam

2016

ACS Sustainable Chem. Eng.

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“…The deconvoluted peaks for Co 2p show a doublet at the binding energies of 780.35 (780.35 and 780.68) eV and 795.55 (796.11 and 795.71) eV for ZnCo-ZIF (ZnCo-ZIF/GN-120, ZnCo-ZIF/GN-120+NO 2 ), respectively. This doublet is related to Co 3+ ions, 56,57 and the peak at 781.55 (781.84 and 781.98) eV is from the Co 2+ species 58 (Figure 5c). In addition, two satellite peaks are observed at 802.90 and 786.21 eV, confirming the formation of ZnCo-ZIF/GN.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Zn–Co Zeolitic Imidazolate Framework Nanoparticles Intercalated in Graphene Nanosheets for Room-Temperature NO₂ Sensing

Zhang

et al. 2021

ACS Appl. Nano Mater.

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A facile solvothermal method has been employed to fabricate ZnCo zeolite imidazolate framework (ZIF) nanoparticles intercalated graphene nanosheet (ZnCo-ZIF/GN), in which ZnCo-ZIF nanoparticles are uniformly distributed. The optimized ZnCo-ZIF/GN-120 sensor has a highly sensitive response of 54.61 for 100 ppm of NO 2 , and the detection limit reaches 10 ppb at room temperature (rt, 22 °C; relative humidity, 30%). The ZnCo-ZIF/GN-120 sensor is shown to have good selectivity, excellent stability, and repeatability for NO 2 detection. The facile fabrications of the composites of ZnCo-ZIF nanoparticles and highly conductive GNs pave the way for developing advanced high-performance NO 2 sensors.

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“…Cycled at 90 mA g À 1 , the rGO/ZnCo 2 O 4 composite could deliver a high reversible capacity of 960.8 mAh g À 1 over 100 cycles, and exhibited an outstanding capacity retention as anode for LIBs. In addition, many researchers also constructed ZnCo 2 O 4 with rGO composites and used as anodes of LIBs or flexible LIBs, such as candwich-like rGO wrapped MOF-derived ZnCo 2 O 4 À ZnOÀ C on nickel foam, [91] chemically integrated hierarchical microsphere ZnCo 2 O 4 /rGO hybrid composites, [92] rGO covered ZnCo 2 O 4 porous nanowire array hierarchical structure on Ni-foam, [93] self assembled rice ball-like ZnCo 2 O 4 inlaid on rGO, [94] ZnCo 2 O 4 @ rGO nanocomposite, [95] oxygen-vacancy abundant nano-ZnCo 2 O 4 /porous reduced graphene oxide, [96] strongly coupled hybrid ZnCo 2 O 4 quantum dots/rGO [97] and so on. All the ZnCo 2 O 4 modified by rGO effectively improved the rate and cycling properties of ZnCo 2 O 4 to varying degrees, providing a valid path for promoting the electrochemical performance of electrode materials of LIBs.…”

Section: Modified With Carbonaceous Materialsmentioning

confidence: 99%

Recent Advances of ZnCo₂O₄‐based Anode Materials for Li‐ion Batteries

Han

Zou

Wei

2022

Chemistry An Asian Journal

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ZnCo2O4 has been attracted wide research attention as a promising anode material for lithium‐ion batteries (LIBs) in recent years based on its high theoretical specific capacity, low toxicity as well as stable chemical properties. However, the further large‐scale application of pristine ZnCo2O4 anode have been impeded because of its undesirable Li+ ion conductivity, low electronic conductivity, and finite stability of electrolytes at high potentials. Recently, optimizing the micro/nano structure, modification with carbonaceous materials, incorporation with metal oxides and constructing a binder‐free structure on conductive substrate for ZnCo2O4‐based materials have been verified as promising effective routes for solving the above problems. In this review, the recent advances in underlying reaction mechanisms, synthetic methods and strategies for improving the performance of ZnCo2O4 anodes are comprehensively summarized. The factors affecting the electrochemical properties of ZnCo2O4‐based materials are mainly discussed, and paths to promote the specific capacity and cyclic stability are proposed. Finally, several insights into the future developments, challenges, and prospects of ZnCo2O4‐based anode materials of LIBs are proposed.

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Strongly coupled hybrid ZnCo2O4 quantum dots/reduced graphene oxide with high-performance lithium storage capability

Cited by 21 publications

References 57 publications

Composite of Zinc Using Graphene Quantum Dot Bath: A Prospective Material For Energy Storage

Composite of Zinc Using Graphene Quantum Dot Bath: A Prospective Material For Energy Storage

Zn–Co Zeolitic Imidazolate Framework Nanoparticles Intercalated in Graphene Nanosheets for Room-Temperature NO₂ Sensing

Recent Advances of ZnCo₂O₄‐based Anode Materials for Li‐ion Batteries

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Strongly coupled hybrid ZnCo2O4 quantum dots/reduced graphene oxide with high-performance lithium storage capability

Cited by 21 publications

References 57 publications

Composite of Zinc Using Graphene Quantum Dot Bath: A Prospective Material For Energy Storage

Composite of Zinc Using Graphene Quantum Dot Bath: A Prospective Material For Energy Storage

Zn–Co Zeolitic Imidazolate Framework Nanoparticles Intercalated in Graphene Nanosheets for Room-Temperature NO2 Sensing

Recent Advances of ZnCo2O4‐based Anode Materials for Li‐ion Batteries

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Zn–Co Zeolitic Imidazolate Framework Nanoparticles Intercalated in Graphene Nanosheets for Room-Temperature NO₂ Sensing

Recent Advances of ZnCo₂O₄‐based Anode Materials for Li‐ion Batteries