Journal ArticleDOI
Monodisperse cobalt sulfides embedded within nitrogen-doped carbon nanoflakes: an efficient and stable electrocatalyst for the oxygen reduction reaction
TLDR
In this paper, the authors reported the designed synthesis of Co9S8 and nitrogen doped hollow carbon sphere composites by carbonization of metanilic anions within the confinement of two-dimensional galleries of hollow spherical cobalt-aluminum layered double hydroxides.Abstract:
Unique hollow hybrid structures composed of well-dispersed catalyst nanoparticles embedded in a carbon matrix offer great advantages for constructing advanced supported catalysts. Herein, we report the designed synthesis of Co9S8 and nitrogen doped hollow carbon sphere (Co9S8/NHCS) composites by carbonization of metanilic anions within the confinement of two-dimensional galleries of hollow spherical cobalt–aluminum layered double hydroxides. The Co9S8/NHCS composites are composed of numerous porous carbon nanoflakes, and monodisperse Co9S8 nanoparticles are embedded within the carbon nanoflakes. Electrochemical measurements show that the Co9S8/NHCS catalysts prepared at 900 °C exhibit superior oxygen reduction reaction (ORR) activity, resulting in the highest ORR performance to date among all transition metal sulfide-based ORR catalysts in both alkaline and acidic electrolytes. This interlayer confined reaction approach may provide an efficient platform for the synthesis of other functional materials for alternative applications.read more
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Journal ArticleDOI
Mixed Metal Sulfides for Electrochemical Energy Storage and Conversion
Xin-Yao Yu,Xiong Wen David Lou +1 more
TL;DR: Mixed metal sulfides (MMS) have attracted increased attention as promising electrode materials for electrochemical energy storage and conversion systems including lithium-ion batteries (LIBs), SIBs, hybrid supercapacitors (HSCs), metal-air batteries (MABs), and water splitting as discussed by the authors.
Journal ArticleDOI
Opening Two-Dimensional Materials for Energy Conversion and Storage: A Concept
TL;DR: In this paper, a review mainly focuses on the opening of 2D materials and their subsequent applications in energy conversion and storage fields, expecting the development of such a new class of materials, namely expanded 2D Materials.
Journal ArticleDOI
Recent Advances toward the Rational Design of Efficient Bifunctional Air Electrodes for Rechargeable Zn-Air Batteries.
TL;DR: Recent advances of air electrodes from bifunctional catalysts to architectures are summarized, and their advantages and disadvantages are discussed to underline the importance of progress in the evolution of bifunctionsal air electrodes.
Journal ArticleDOI
Inverse-opal-structured hybrids of N, S-codoped-carbon-confined Co9S8 nanoparticles as bifunctional oxygen electrocatalyst for on-chip all-solid-state rechargeable Zn-air batteries
TL;DR: In this paper, the inverse-opal-structured hybrid of N, S-codoped carbon-confined Co9S8 nanoparticles for high-efficient bifunctional electrocatalysts at air-cathode and polyacrylamide-co-polyacrylic acid alkalinous hydrogel of high ion-conductivity and water holding power for solid electrolyte, on-chip all-solid-state rechargeable Zn-air batteries (OAR-ZABs) are developed.
References
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Journal ArticleDOI
Two-Dimensional Mesoporous Cobalt Sulfide Nanosheets as a Superior Anode for a Li-Ion Battery and a Bifunctional Electrocatalyst for the Li–O2 System
Palanichamy Sennu,Maria Christy,Vanchiappan Aravindan,Young-Gi Lee,Kee Suk Nahm,Yun-Sung Lee +5 more
TL;DR: In this paper, the synthesis of two-dimensional Co3S4 in a nanothickness sheet-like morphology via simple hydrothermal process and its application to electrochemical energy storage devices was reported.
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Heazlewoodite, Ni3S2: A Potent Catalyst for Oxygen Reduction to Water under Benign Conditions
TL;DR: Under these conditions, the activity and stability of Ni3S2 exceeds that of polycrystalline platinum and manganese, nickel, and cobalt oxides, illustrating the catalytic potential of pairing labile first-row transition metal active sites with a more covalent sulfide host lattice.
Journal ArticleDOI
Carbon nanorings and their enhanced lithium storage properties.
TL;DR: If these diffi culties can be overcome, enabling super-short CNTs to be synthesized, the resulting materials should have fascinating properties with applications in biomedicine, catalysis, hydrogen storage and more.
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Hierarchical hollow urchin-like NiCo2O4 nanomaterial as electrocatalyst for oxygen evolution reaction in alkaline medium
TL;DR: Hierarchical hollow urchins of NiCo2O4 were synthesized by a hard templating method followed by thermal decomposition as discussed by the authors, which showed superior electrocatalytic activity towards oxygen evolution processes with lower overpotential, higher current density, and higher stability.
Journal ArticleDOI
Cu-Deficient Plasmonic Cu2–xS Nanoplate Electrocatalysts for Oxygen Reduction
TL;DR: In this paper, a facile one-pot method was developed to prepare p-doped copper sulfide nanoplates with tunable localized surface plasmon resonance (LSPR) at moderate temperature (below 100 °C) without any hot injection or rapid mixing step.