Self-assembled CoSe 2 nanocrystals embedded into carbon nanowires as highly efficient catalyst for hydrogen evolution reaction

Zhou, Keren; He, Jian; Wang, Xinqiang; Lin, Jie; Ye, Jing; Zhang, Wanli; Chen, Yuanfu

doi:10.1016/j.electacta.2017.02.089

Cited by 107 publications

(36 citation statements)

References 40 publications

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“…[42,43] As shown in Figure 1m, the two peaks at 55.8 and 54.8 eV are, respectively, attributed to Se 3d 3/2 and Se 3d 5/2 . [44] Finally, the peak at 60.4 eV is assigned to Co 3p while the peak at 59.4 eV corresponds to the oxide species of Se edges on the CoSe nanoparticles.…”

Section: Resultsmentioning

confidence: 99%

3D CoSe@C Aerogel as a Host for Dendrite‐Free Lithium‐Metal Anode and Efficient Sulfur Cathode in Li–S Full Cells

Manthiram

2020

Advanced Energy Materials

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154

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have been explored to mitigate the LiPS shuttling. [15-17] However, most of the polar hosts with poor conductivity compromise the electron transport, which is undesirable for efficient LiPS conversion. [18,19] Therefore, it is urgent to explore advanced polar hosts with high conductivity and efficient catalytic activity for the polysulfide redox. Beyond sulfur cathodes, the issues of Limetal anode, especially dendritic lithium growth that causes safety hazards, need to be urgently addressed. Typically, Li foils with high negative to positive electrode capacity ratio (N/P) of over 50 are used. It is pertinent to have an N/P ratio much less than 10 for practical relevance. However, metallic Li loses its mechanical integrity at low thickness owing to its softness. These issues lead to a drastic reduction in Coulombic efficiency and subsequent fast termination of battery life. Over the past decade, various strategies have been developed to tackle the issue of lithium instability. For instance, employing functional additives, such as LiNO 3 and LiF, can strengthen the solid-electrolyte interphase (SEI) and suppress Li dendrite growth. However, this approach does not address the problem of infinite volume changes associated with Li metal during Li plating/stripping. [20-23] Porous and conductive substrates, such as 3D Cu foam and Ni foam, are employed to simultaneously mitigate the uncontrollable dendritic Li growth and minimize volume variation during continuous plating/ stripping. [24-26] However, the high mass densities of these metal hosts dramatically decrease the energy and power density of the anode. In this regard, it is highly desirable to explore lightweight, porous, and lithiophilic host materials for Li metal. Various lightweight porous carbonaceous materials, including graphene and carbon nanofibers, have shown great potential for energy storage applications. [27-29] Their appealing properties, such as high electrical conductivity, low mass density, and rich porosity, suggest that carbonaceous materials can be promising hosts for Li metal. [30] However, owing to the lithiophobic property of carbonaceous materials, Li metal cannot uniformly deposit on carbon frameworks. [31] Recently, several lithiophilic materials including, ZnO, Co 3 O 4 , and VN have been decorated onto carbonaceous scaffolds to ensure homogeneous growth/nucleation of Li metal. [31-33] Motivated by these findings, a rational design of 3D lithiophilic hosts is essential for developing stable Li-metal anodes. Transition-metal selenides with high electrical conductivity and polar character have drawn extensive research interest for Lithium-sulfur batteries are appealing due to their high energy density and low cost. However, their commercial viability is challenged by uncontrollable dendritic Li growth and severe polysulfide shuttling during cycling. Here, a 3D framework coupling lithiophilic and catalytic CoSe nanoparticles with conductive carbon nanowires (CoSe@C) as an efficient host both for lithium and sulfur is reported. As a cathode ...

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Section: Resultsmentioning

confidence: 99%

3D CoSe@C Aerogel as a Host for Dendrite‐Free Lithium‐Metal Anode and Efficient Sulfur Cathode in Li–S Full Cells

Manthiram

2020

Advanced Energy Materials

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154

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“…[30] In the high-resolution XPS spectrum of Se 3d (Figure 5c), the two peaks for Se 3d 5/2 (54.8 eV) and for Se 3d 3/2 (55.5 eV) are located at binding energies consistent with the metal-Se interactions of CoSe 2 . [32,33] The peaks in the range of 58-61 eV are attributed to Co 3p and SeO bonding at the surface of the composites. [30] The additional peak at 60.9 eV is attributed to SeO bonding formed by the oxidation of metalloid Se under atmospheric conditions.…”

Section: Resultsmentioning

confidence: 99%

Golden Bristlegrass‐Like Hierarchical Graphene Nanofibers Entangled with N‐Doped CNTs Containing CoSe₂ Nanocrystals at Each Node as Anodes for High‐Rate Sodium‐Ion Batteries

Lee

Jeong

et al. 2020

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Recently, transition-metal chalcogenides (TMCs) have widely been studied as anode materials for sodium-ion batteries (SIBs) because of their structural characteristics and unusual chemical, physical, and electronic properties. [1-3] However, their practical energy-storage performance is far below the Golden bristlegrass-like unique nanostructures comprising reduced graphene oxide (rGO) matrixed nanofibers entangled with bamboo-like N-doped carbon nanotubes (CNTs) containing CoSe 2 nanocrystals at each node (denoted as N-CNT/rGO/CoSe 2 NF) are designed as anodes for high-rate sodium-ion batteries (SIBs). Bamboo-like N-doped CNTs (N-CNTs) are successfully generated on the rGO matrixed nanofiber surface, between rGO sheets and mesopores, and interconnected chemically with homogeneously distributed rGO sheets. The defects in the N-CNTs formed by a simple etching process allow the complete phase conversion of Co into CoSe 2 through the efficient penetration of H 2 Se gas inside the CNT walls. The N-CNTs bridge the vertical defects for electron transfer in the rGO sheet layers and increase the distance between the rGO sheets during cycles. The discharge capacity of N-CNT/ rGO/CoSe 2 NF after the 10 000th cycle at an extremely high current density of 10 A g −1 is 264 mA h g −1 , and the capacity retention measured at the 100th cycle is 89%. N-CNT/rGO/CoSe 2 NF has final discharge capacities of

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“…[1][2][3][4][5][6][7][8][9][10][11] As one type of electrochemical energy storage device, batteries have a high energy density and low power density. However, it is necessary to address the serious problem that extensive use of fossil fuel causes environmental degradation and resource shortage.…”

Section: Introductionmentioning

confidence: 99%

Metal‐Organic Framework‐Derived Carbons for Battery Applications

Zheng

Jin

et al. 2018

Advanced Energy Materials

191

112

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batteries, sodium-selenium (Na-Se) batteries, Li-tellurium (Li-Te) batteries, and Na-S batteries) have their own distinctive applications due to their various characteristics. To explore new materials with high performance, large studies have been devoted to the development of nextgeneration batteries.Porous carbon (PC) materials possess many unique properties due to their large surface areas, high conductivity, large pore volumes, high thermal stability, and surface functionalities, [22][23][24] leading to their wide use in energy storage and conversion. Traditionally, PC can be obtained via various methods, such as the direct heat treatment of organic precursors, hard template or nanocast methods, and soft template methods. However, the production of PC from these methods cannot be scaled-up because of certain barriers (disordered structure with wide size distributions, complicated processes, etc.). [23,25,26] Metal-organic frameworks (MOFs) have drawn wide research interest as a novel class of porous materials that are crystalline materials consisting of metal ions and organic ligands. [4,21,[27][28][29][30][31] Since the report on the MOF-templated synthesis of PC in 2008, [32] a large number of studies have been reported on the use of MOFs as suitable precursors/templates for carbon synthesis. [22,26,[33][34][35] At present, a large number of studies indicate that zeolitic imidazolate framework-8 (ZIF-8), MOF-5, MIL-125 (Ti) (MIL = Materials of Institute Lavoisier), and ZIF-67 with excellent thermal stability and unique porous structures are the more commonly used MOF precursors (Scheme 1). [3,36,37] All of them, ZIF-8, possessing nitrogen-containing ligands, has high porosity and thermal stability. [38][39][40] MOF-5 possesses excellent thermal stability, high porosity, and so on. [41] MIL-125, an active photocatalyst, includes cyclic octamers of TiO 2 octahedra. [42,43] ZIF-67 has a tunable pore aperture, highly stable structure, and catalytic activity. [37,44,45] The above-mentioned MOFs have been widely used for gas adsorption, molecular separation, catalysis, batteries, supercapacitors, and so on. [13,14,33] Moreover, carbon hybrids containing nanostructured metal species (e.g., metal oxides (MOs)) are likely to form under in situ carbonization conditions. [46] Compared with the carbonaceous materials from conventional precursors, MOF-derived carbon materials have significant advantages with high specific surface areas, tailorable porosities, unique morphologies, and easy functionalization with other heteroatoms. [14,23,31] For example, Xu and co-workers [47] obtained 1D carbon nanorods via the pyrolysis The applications of carbon and carbon-based materials with high porosity, high surface area, and functionalities based on metal-organic framework precursors and/or templates have attracted significant research interest in recent years, particularly in the field of batteries. The chemical and physical properties of carbon and carbon-based materials obtained by the heat treatment of various metal-organic ...

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Self-assembled CoSe 2 nanocrystals embedded into carbon nanowires as highly efficient catalyst for hydrogen evolution reaction

Cited by 107 publications

References 40 publications

3D CoSe@C Aerogel as a Host for Dendrite‐Free Lithium‐Metal Anode and Efficient Sulfur Cathode in Li–S Full Cells

3D CoSe@C Aerogel as a Host for Dendrite‐Free Lithium‐Metal Anode and Efficient Sulfur Cathode in Li–S Full Cells

Golden Bristlegrass‐Like Hierarchical Graphene Nanofibers Entangled with N‐Doped CNTs Containing CoSe₂ Nanocrystals at Each Node as Anodes for High‐Rate Sodium‐Ion Batteries

Metal‐Organic Framework‐Derived Carbons for Battery Applications

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Self-assembled CoSe 2 nanocrystals embedded into carbon nanowires as highly efficient catalyst for hydrogen evolution reaction

Cited by 107 publications

References 40 publications

3D CoSe@C Aerogel as a Host for Dendrite‐Free Lithium‐Metal Anode and Efficient Sulfur Cathode in Li–S Full Cells

3D CoSe@C Aerogel as a Host for Dendrite‐Free Lithium‐Metal Anode and Efficient Sulfur Cathode in Li–S Full Cells

Golden Bristlegrass‐Like Hierarchical Graphene Nanofibers Entangled with N‐Doped CNTs Containing CoSe2 Nanocrystals at Each Node as Anodes for High‐Rate Sodium‐Ion Batteries

Metal‐Organic Framework‐Derived Carbons for Battery Applications

Contact Info

Product

Resources

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Golden Bristlegrass‐Like Hierarchical Graphene Nanofibers Entangled with N‐Doped CNTs Containing CoSe₂ Nanocrystals at Each Node as Anodes for High‐Rate Sodium‐Ion Batteries