Bimetallic metal-organic frameworks derived Ni-Co-Se@C hierarchical bundle-like nanostructures with high-rate pseudocapacitive lithium ion storage

Yang, Tao; Liu, Yangai; Yang, Dexin; Deng, Bingbing; Huang, Zhaohui; Ling, Chris D.; Líu, Hao; Wang, Guoxiu; Guo, Zaiping; Zheng, Rongkun

doi:10.1016/j.ensm.2018.05.024

Cited by 124 publications

(68 citation statements)

References 80 publications

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“…XPS is used to investigate the chemical states and composition of the IN‐PSNCs‐X. In the high‐resolution Co 2p spectra for IN‐PSNCs‐2, IN‐PSNCs‐3 and IN‐PSNCs‐5 (Figure a), two pairs of peaks for Co 3+ and Co 2+ can be observed . In addition, the portion of Co 3+ gradually increases with the S content, demonstrating that the S content of H‐SNCs‐X affects the chemical valence of Co ion in IN‐PSNCs‐X.…”

Section: Resultscontrasting

confidence: 93%

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Microstructural Engineering of Heterogeneous P−S−Co Interface for Oxygen and Hydrogen Evolution

Wang

et al. 2019

ChemElectroChem

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Fabricating and engineering heterointerface was an effective approach to improve electrochemical activity of catalysts through modulating their atomic arrangement and chemical states. Herein, cobalt phosphide and cobalt sulfide (CoP/CoS x ) heterostructure hollow nanocones were fabricated by an in situ ion intercalation template-assisted method. The microstructure of the heterointerface could be adjusted by changing the molar ratio of S/P. Electrochemical investigation revealed that the disordered structures at the heterointerface could influence the catalytic behavior of active sites. Rationally engineering the disordered structure could improve the electrocatalytic activity for oxygen and hydrogen evolution reactions (OER/HER). The optimized CoP/CoS x heterostructure exhibited favorable catalytic activity for OER, which delivered an overpotential at 10 mA cm À 2 of 313 mV and a Tafel slope (93 mV dec À 1 ) in alkaline media. Meanwhile, the optimized CoP/CoS x heterostructure also exhibited superior HER performance under acidic condition.

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Section: Resultscontrasting

confidence: 93%

“…Transition metal phosphides (TMPs) and transition metal chalcogenides (TMDs) have been widely concerned, and indicated as high active electrocatalysts in OER and hydrogen evolution reaction (HER) . Recent research shows that metal phosphosulfide composite has much more superior electrocatalytic activity than its individual components .…”

Section: Introductionmentioning

confidence: 99%

Microstructural Engineering of Heterogeneous P−S−Co Interface for Oxygen and Hydrogen Evolution

Wang

et al. 2019

ChemElectroChem

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“…The capacitive process including physical adsorption/desorption of electrolyte ions and fast surface redox reactions (capacitive contributions), and the diffusion process is kinetic sluggish redox reactions controlled by the diffusion of electrolyte ion (diffusion-controlled contributions). This method is suitable for batteries due to the narrow range of sweep rates and is widely used in many articles [47][48][49]. For supercapacitors, however, on account of the large range of sweep rate, this method is not appropriate.…”

Section: Electrochemical Analysismentioning

confidence: 99%

NiSe2/Ni(OH)2 Heterojunction Composite through Epitaxial-like Strategy as High-Rate Battery-Type Electrode Material

Mei

Huang

et al. 2020

Nano-Micro Lett.

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“…[50] It has been demonstrated that the pseudocapacitive behavior could induce the fast Li + transfer, contributing to the improved rate capability and high capacity. [51] To evaluate the structural stability of electrodes, we employ finite element method to simulate the lithiation of our sample electrodes, in which newly generated products (Li 2 O, Li 2 S, and Co nanoparticles) accumulate to an impacted structure. To make the simulation as realistic as possible, two corresponding models shown in Figure 7a,c, are built to represent the arrangement of generated particles in CoO@G and CoOS 0.1 @G. The distribution of the compressive stress of the center particles is shown in Figure 7b,d.…”

Section: Resultsmentioning

confidence: 99%

Engineering Hierarchical CoO Nanospheres Wrapped by Graphene via Controllable Sulfur Doping for Superior Li Ion Storage

et al. 2020

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The inferior conductivity and large volume expansion impair the widespread applications of metal oxide‐based anode materials for lithium‐ion batteries. To address these issues, herein an efficient strategy of structural engineering is proposed to improve lithium storage performance of hierarchical CoO nanospheres wrapped by graphene via controllable S‐doping (CoOS0.1 @ G). S‐doping promotes the Li+ diffusion kinetics of CoO by expanding the interplanar spacing of CoO, lowering the activation energy, and improving the pseudocapacitance contribution. Meanwhile, the electronic structure of CoO is adjusted by S‐doping as confirmed by density functional theory calculations, thus enhancing the conductivity. Finite element analysis reveals that the produced Li2S during lithiation improves the structural stability of the S‐doped electrode, which is further confirmed by experimental observation. As expected, CoOS0.1 @ G exhibits excellent lithium storage performance with an initial discharge capacity of 1974 mAh g−1 at 100 mA g−1, and high discharge capacity of 1573 mAh g−1 after 400 cycles at 500 mA g−1. It is believed that the insights into the structural doping enlighten research to explore other metal oxides for fast and stable Li ion storage.

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Bimetallic metal-organic frameworks derived Ni-Co-Se@C hierarchical bundle-like nanostructures with high-rate pseudocapacitive lithium ion storage

Cited by 124 publications

References 80 publications

Microstructural Engineering of Heterogeneous P−S−Co Interface for Oxygen and Hydrogen Evolution

Microstructural Engineering of Heterogeneous P−S−Co Interface for Oxygen and Hydrogen Evolution

NiSe2/Ni(OH)2 Heterojunction Composite through Epitaxial-like Strategy as High-Rate Battery-Type Electrode Material

Engineering Hierarchical CoO Nanospheres Wrapped by Graphene via Controllable Sulfur Doping for Superior Li Ion Storage

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