A high-efficiency N/P co-doped graphene/CNT@porous carbon hybrid matrix as a cathode host for high performance lithium–sulfur batteries

Wu, Hao; Li, Xia; Ren, Juan; Zheng, Qiaoji; Xu, Cheng; Lin, Dunmin

doi:10.1039/c7ta06504c

Cited by 121 publications

(77 citation statements)

References 42 publications

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“…Chen et al synthesized nitrogen, boron co-doped curved graphene nanoribbons (NBCGN) as the carbon precursor and heteroatom sources. Wu et al successfully synthesized an N, P-co-doped 3D carbon hybrid via one-pot pyrolysis process, [35] which owed the 3D interconnected porous frameworks that contributed greatly to the rapid transportation of Li + /e − and suppression of shuttle effect via physical confinement and chemical interaction. They found that N and B co-doping configuration can render the synergistic effect, which produces the NBCGN with larger specific surface area (SSA) and pore volume, better electronic conductivity, enhanced S dispersity, and stronger affinity for LiPSs.…”

Section: Wwwadvancedsciencenewscommentioning

confidence: 99%

Adsorption‐Catalysis Design in the Lithium‐Sulfur Battery

Zhang

Chen

Xue

et al. 2019

Advanced Energy Materials

312

247

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Lithium‐sulfur (Li‐S) batteries are one of the most promising next‐generation energy‐storage systems. Nevertheless, the sluggish sulfur redox and shuttle effect in Li‐S batteries are the major obstacles to their commercial application. Previous investigations on adsorption for LiPSs have made great progress but cannot restrain the shuttle effect. Catalysts can enhance the reaction kinetics, and then alleviate the shuttle effect. The synergistic relationship between adsorption and catalysis has become the hotspot for research into suppressing the shuttle effect and improving battery performance. Herein, the adsorption‐catalysis synergy in Li‐S batteries is reviewed, the adsorption‐catalysis designs are divided into four categories: adsorption‐catalysis for LiPSs aggregation, polythionate or thiosulfate generation, and sulfur radical formation, as well as other adsorption‐catalysis. Then advanced strategies, future perspectives, and challenges are proposed to aim at long‐life and high‐efficiency Li‐S batteries.

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Section: Wwwadvancedsciencenewscommentioning

confidence: 99%

Adsorption‐Catalysis Design in the Lithium‐Sulfur Battery

Zhang

Chen

Xue

et al. 2019

Advanced Energy Materials

312

247

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“…The chemical adsorption between host material and Li 2 S 6 polysulfide was also investigated by XPS measurement. As displayed in Figure b and d, the Li 1s spectrum of Co, N−C‐−Li 2 S 6 and Co, N−C@RFC/CNTs−Li 2 S 6 reveal a single symmetric peak at 58.8 and 58.9 eV, corresponding to the Li−N due to the interaction between Li + and N atoms . In addition, the S 2p spectrums of Co, N−C−Li 2 S 6 and Co, N−C@RFC/CNTs−Li 2 S 6 show the three different sulfur environment (Figure c and e), which are assigned to the terminal sulfur atom (S T −1 ), bridging sulfur atom (S 0 B ) and the related thiosulfate or polythionate species, respectively.…”

Section: Resultsmentioning

confidence: 84%

“…A variety of porous carbon/sulfur composite materials have been explored and investigated which exhibited excellent electrochemical performance . In general, porous carbonaceous scaffolds can improve the conductivity of electrode, offer rapid ions/e − transport pathways and physically confine polysulfides through pore structure . Nevertheless, the weak interactions between nonpolar carbon materials and polar sulfur species are insufficient to restrain polysulfides diffusion and shuttle over long‐term cycling, unavoidably resulting in serious capacity fading .…”

Section: Introductionmentioning

confidence: 99%

A Porous Carbon Polyhedron/Carbon Nanotube Based Hybrid Material as Multifunctional Sulfur Host for High‐Performance Lithium‐Sulfur Batteries

et al. 2019

Self Cite

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To develop high‐performance lithium‐sulfur (Li−S) batteries, designing and exploring an advanced sulfur cathode with a conductive and polar robust framework is highly significant to suppress the “shuttle effect” of polysulfides and enhance the utilization of active sulfur. Herein, a multifunctional conductive nanohybrid, which acts as a sulfur host, is rationally constructed by inserting/intertwining carbon nanotubes (CNTs) onto Co‐embedded N‐doped porous dual carbon polyhedrons derived from a resorcinol‐formaldehyde (RF) polymer layer enwrapping ZIF‐67 metal‐organic frameworks (MOFs) (Co, N−C@RFC/CNTs). The porous carbon polyhedrons can accommodate a high amount of sulfur owing to their large inner void space; the RF coating carbon layer and the CNTs effectively increase the conductivity and build a network for providing smooth ions/e− pathways; In addition, the polar Co particles and electronegative N heteroatoms synergistically strengthen the chemical adsorption of polysulfides and accelerate the redox reaction of the sulfur cathode. Benefiting from these advantages, the as‐fabricated Co, N−C@RFC/CNTs/S cathode delivers a high reversible capacity of 1373.7 mAh g−1 at 0.1 C, an impressive rate performance with 659.2 mAh g−1 at 2.0 C, and an outstanding cycling stability with an ultralow capacity decay rate of 0.041 % per cycle for 500 cycles at 1.0 C. This work provides a facile and high‐efficiency approach to fabricating excellent‐performance storage materials based on an MOF precursor.

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“…In addition to unique interconnected 3D framework construction, heteroatoms (such as nitrogen, oxygen, boron, and phosphor) [12,13] doping is an effective method to enhance the application properties of the 3D carbon materials for diverse applications and especially for catalytic application. Nitrogen is a well-known electron donating doping atom and nitrogen doping can significantly improve the negative charges mobility on the surface of carbon materials [14][15][16][17] and creates nitrogen vacancies which are beneficial for various kinds of heterogeneous catalytic reaction, direct dehydrogenation of ethylbenzene for example.…”

Section: Introductionmentioning

confidence: 99%

Three‐Dimensional Interconnected Porous Nitrogen‐Doped Carbon Hybrid Foam for Notably Promoted Direct Dehydrogenation of Ethylbenzene to Styrene

Zhao

2019

ChemCatChem

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Owning to the high corrosion-resistance, stable structure, unique surface properties and sustainability, the carbon-base catalysts have attracted increasing interest in heterogeneous catalysis. Herein, we report a facile combining strategy to fabricate a novel three-dimensional (3D) interconnected porous nitrogen-doped carbon hybrid foam featuring with the interconnected nitrogen-doped carbon foam coated by porous nitrogen-doped carbon (NC MS @NC Glu-NH4Cl ) by annealing the freeze-dried NH 4 Cl-glucose containing aqueous solution soaked melamine sponge (MS@Glu/NH 4 Cl). The as-prepared NC MS @NC Glu-NH4Cl hybrid foam shows 1.6 times high steady-state styrene rate (4.77 mmol g À 1 h À 1 ) with 96.4 % of selectivity for direct dehydrogenation of ethylbenzene to styrene as compared to the well-established nanodiamond. This work not only generates an excellent carbon catalyst to replace the established nanodiamond for direct dehydrogenation of ethylbenzene, but also opens up a potential avenue for designing novel carbon materials towards the adsorption and supercapacitor besides acting as a promising catalyst for diverse transformations.[a] Dr.

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A high-efficiency N/P co-doped graphene/CNT@porous carbon hybrid matrix as a cathode host for high performance lithium–sulfur batteries

Abstract: Eco-friendly, multi-heteroatom-doped 3D hybrids were constructed for the first time by one-pot pyrolysis and showed excellent electrochemical performance.

Cited by 121 publications

References 42 publications

Adsorption‐Catalysis Design in the Lithium‐Sulfur Battery

Adsorption‐Catalysis Design in the Lithium‐Sulfur Battery

A Porous Carbon Polyhedron/Carbon Nanotube Based Hybrid Material as Multifunctional Sulfur Host for High‐Performance Lithium‐Sulfur Batteries

Three‐Dimensional Interconnected Porous Nitrogen‐Doped Carbon Hybrid Foam for Notably Promoted Direct Dehydrogenation of Ethylbenzene to Styrene

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