Controllable sulfidation of polymetallic nickel cobalt molybdenum layered double hydroxides on Ni foam for high-performance hybrid supercapacitors
Literature Information
Dapeng Luo, Jinping Zou, Zhaohui Wei, Xiaoyun Ye, Qianting Wang, Li-An Ma
In situ construction of polymetallic layered double hydroxide (LDH) @sulfide heterostructures (LDH@sulfides) is a promising strategy to achieve excellent electrochemical performance by providing more redox active sites and facilitating ion/electron pathways. Herein, nickel cobalt molybdenum based LDH@sulfide core–shell composites (NCM-LDH@NCMS) grown on Ni foam have been successfully prepared via a facile hydrothermal method, followed by controllable sulfidation methods. The effect of sulfidation time on the electrochemical performance of NCM-LDH@NCMS was investigated. The NCM-LDH nanosheets minimized the diffusion path of electrolyte ions and accelerated the kinetics of redox reactions, and the outer Ni–Co–Mo sulfides effectively improved the conductivity of LDHs and exposed more active sites. With sulfidation for 2 h, the obtained NCM-LDH@NCMS-2 exhibited excellent electrochemical performance, with a specific capacitance of ∼7.73 F cm−2 at 10 mA cm−2, and better capacitance rate performance of 56.7% at 50 mA cm−2. Furthermore, hybrid NCM-LDH@NCMS-2//activated carbon supercapacitors provided a high energy density of 0.25 mW h cm−2 at 40 mW cm−2 and excellent cycling stability of 89.82% after 8000 cycles at 8 mA−2.
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CrystEngComm

CrystEngComm is the forum for the design and understanding of crystalline materials. We welcome studies on the investigation of molecular behaviour within crystals, control of nucleation and crystal growth, engineering of crystal structures, and construction of crystalline materials with tuneable properties and functions. We publish hypothesis-driven research into… how crystal design affects thermodynamics, phase transitional behaviours, polymorphism, morphology control, solid state reactivity (crystal-crystal solution-crystal, and gas-crystal reactions), optoelectronics, ferroelectric materials, non-linear optics, molecular and bulk magnetism, conductivity and quantum computing, catalysis, absorption and desorption, and mechanical properties. Using Techniques and methods including… Single crystal and powder X-ray, electron, and neutron diffraction, solid-state spectroscopy, spectrometry, and microscopy, modelling and data mining, and empirical, semi-empirical and ab-initio theoretical evaluations. On crystalline and solid-state materials. We particularly welcome work on MOFs, coordination polymers, nanocrystals, host-guest and multi-component molecular materials. We also accept work on peptides and liquid crystals. All papers should involve the use or development of a design or optimisation strategy. Routine structural reports or crystal morphology descriptions, even when combined with an analysis of properties or potential applications, are generally considered to be outside the scope of the journal and are unlikely to be accepted.













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