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  • Royal Society of Chemistry (RSC)  (5)
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  • Royal Society of Chemistry (RSC)  (5)
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  • 1
    Online Resource
    Online Resource
    Graphene oxide wrapped hollow mesoporous carbon spheres as a dynamically bipolar host for lithium–sulfur batteries
    Royal Society of Chemistry (RSC) ; 2022
    In:  Journal of Materials Chemistry A Vol. 10, No. 45 ( 2022), p. 24422-24433
    Details
    In: Journal of Materials Chemistry A, Royal Society of Chemistry (RSC), Vol. 10, No. 45 ( 2022), p. 24422-24433
    Abstract: Lithium–sulfur batteries (LSBs) hold great potential as a next-generation electrochemical energy storage and conversion system owing to their high theoretical specific capacity (1675 mA h g −1 ). However, the shuttling of polysulfides dissolved in electrolytes with slow redox kinetics has restricted the near-term commercialization of LSBs. Developing a multifunctional host that can tightly bind polysulfides with fast conversion kinetics represents a promise strategy for improving the electrochemical performances of LSBs towards practical applications. Herein, we design three-dimensional graphene oxide wrapped hollow carbon spheres with straight mesoporous channels (termed “HMCS@GO”) as a novel cathode host for LSBs with several integrated merits: (1) the hollow carbon spheres with a mesoporous shell afford a large interior void for the loading of sulfur species and serve as a conducting substrate for high utilization of the sulfur cathode with reduced polarization; (2) the wrapped graphene oxide layer with rich surface functional groups acts as a polar carrier for effective immobilization of soluble polysulfides and promotes their quick conversion during a charge/discharge process; (3) the hollow carbon spheres also effectively buffer the large volume fluctuation of the sulfur cathode during charge/discharge with enhanced structural integrity during long-term cycling. Experimental data and first-principles density functional theory (DFT) calculations reveal that high electrochemical performance has been realized in LSBs assembled using HMCS@GO as a cathode host. This work can provide new insights into the rational design and fabrication of all carbon-based composite electrodes for useful applications in lithium–sulfur batteries and other electrochemical energy storage and conversion systems.
    Type of Medium: Online Resource
    ISSN: 2050-7488 , 2050-7496
    URL: Article
    DOI: 10.1039/D2TA06686F
    Language: English
    Publisher: Royal Society of Chemistry (RSC)
    Publication Date: 2022
    detail.hit.zdb_id: 2702232-8
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    Online Resource
  • 2
    Online Resource
    Online Resource
    Aggregation-induced emission nanoparticles as photosensitizer for two-photon photodynamic therapy
    Royal Society of Chemistry (RSC) ; 2017
    In:  Materials Chemistry Frontiers Vol. 1, No. 9 ( 2017), p. 1746-1753
    Details
    In: Materials Chemistry Frontiers, Royal Society of Chemistry (RSC), Vol. 1, No. 9 ( 2017), p. 1746-1753
    Type of Medium: Online Resource
    ISSN: 2052-1537
    URL: Article
    DOI: 10.1039/C7QM00092H
    Language: English
    Publisher: Royal Society of Chemistry (RSC)
    Publication Date: 2017
    detail.hit.zdb_id: 2867881-3
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  • 3
    Online Resource
    Online Resource
    Kinetically favorable edge-type iron–cobalt atomic pair sites synthesized via a silica xerogel approach for efficient bifunctional oxygen electrocatalysis
    Royal Society of Chemistry (RSC) ; 2023
    In:  Journal of Materials Chemistry A Vol. 11, No. 2 ( 2023), p. 708-716
    Details
    In: Journal of Materials Chemistry A, Royal Society of Chemistry (RSC), Vol. 11, No. 2 ( 2023), p. 708-716
    Abstract: Efficient fabrication of bimetallic single-atom catalysts (SACs) with bifunctional activity to accelerate both the electrochemical oxygen reduction (ORR) and evolution reactions (OER) is highly desired for advanced battery devices. The chemical environment surrounding the active sites plays a crucial role in modulating charge transfer in catalysis. Herein, we present an in situ silica xerogel tactic to prepare a bifunctional Fe,Co-NC SAC with unique porosity and abundant FeCoN 6 model sites for efficient ORR/OER catalysis. Electrochemical testing of this SAC reveals a potential gap of 0.748 V for the OER and ORR, surpassing the conventional Pt/IrO 2 benchmark. Density functional theory calculations reveal that the edge-type FeCoN 6 site structure greatly reduces the free-energy barrier to promote ORR/OER kinetics. A zinc–air battery using the Fe,Co-NC catalyst exhibits a commendable peak power density of 222 mW cm −2 and long-term stability ( 〉 200 h). This work offers a robust method for synthesizing high-performance bifunctional SACs with kinetically favorable micro-chemical environments.
    Type of Medium: Online Resource
    ISSN: 2050-7488 , 2050-7496
    URL: Article
    DOI: 10.1039/D2TA08257H
    Language: English
    Publisher: Royal Society of Chemistry (RSC)
    Publication Date: 2023
    detail.hit.zdb_id: 2702232-8
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  • 4
    Online Resource
    Online Resource
    Photocatalytic generation of H 2 O 2 over a Z-scheme Fe 2 O 3 @C@1T/2H-MoS 2 heterostructured catalyst for high-performance Fenton reaction
    Royal Society of Chemistry (RSC) ; 2023
    In:  Journal of Materials Chemistry A Vol. 11, No. 4 ( 2023), p. 1991-2001
    Details
    In: Journal of Materials Chemistry A, Royal Society of Chemistry (RSC), Vol. 11, No. 4 ( 2023), p. 1991-2001
    Abstract: The wide application of the Fenton reaction has been severely restricted by the requirement of continuous feeding of H 2 O 2 , the iron-slurry production, and the slow recycle rate of Fe 3+ /Fe 2+ . This work reports transforming type-II Fe 2 O 3 @2H-MoS 2 heterostructures to a Z-scheme Fe 2 O 3 @C@1T/2H-MoS 2 catalyst capable of photocatalytic in situ generation of H 2 O 2 as an oxidant for the subsequent Fenton reaction. With MoS 2 as a co-catalyst to improve the reduction from Fe 3+ to Fe 2+ , the cascade process demonstrates high performance in oxidative degradation of organics ( e.g. , 100 mg L −1 tetracycline within 100 min). The in situ generated H 2 O 2 , with a yield as high as 1575 μmol g −1 h −1 in air-saturated methanol solution (75 vol%), accounts for 43.5% of the total degradation efficiency. The current system represents an effective solution to the challenges in the traditional Fenton reaction, holding great potential for organic pollutant degradation in wastewater.
    Type of Medium: Online Resource
    ISSN: 2050-7488 , 2050-7496
    URL: Article
    DOI: 10.1039/D2TA08145H
    Language: English
    Publisher: Royal Society of Chemistry (RSC)
    Publication Date: 2023
    detail.hit.zdb_id: 2702232-8
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  • 5
    Online Resource
    Online Resource
    MOFs and their derivatives as Sn-based anode materials for lithium/sodium ion batteries
    Royal Society of Chemistry (RSC) ; 2021
    In:  Journal of Materials Chemistry A Vol. 9, No. 48 ( 2021), p. 27234-27251
    Details
    In: Journal of Materials Chemistry A, Royal Society of Chemistry (RSC), Vol. 9, No. 48 ( 2021), p. 27234-27251
    Abstract: The rapid development of electric vehicles and consumer electronics places higher demands on the performance of secondary batteries. Tin-based materials are expected to be a commercial anode material candidate of next-generation rechargeable batteries due to their high gravimetric/volumetric capacity. However, tin anodes have large volume changes during charge–discharge cycles which leads to a rapid capacity decay. Emerging tin-based metal–organic frameworks (Sn-MOFs) have recently attracted the attention of researchers. Their characteristics of tunable porosity, huge surface areas and multiple active sites offer a wide range of possibilities for Li/Na ion storage and transport, and the coordination bonds stabilize the Sn atoms to the organic matrix buffering pulverization and aggregation. Besides, MOF-related Sn derivatives could also have novel diverse functional structures and achieve high-rate capacity and excellent cycle stability. In this review, we mainly summarize the structural features, energy storage mechanism, and recent advances in the rational design and preparation of Sn-MOFs and MOF-derived Sn-based composites for LiB and SIB anodes, and current challenges and future directions for further development are discussed.
    Type of Medium: Online Resource
    ISSN: 2050-7488 , 2050-7496
    URL: Article
    DOI: 10.1039/D1TA06996A
    Language: English
    Publisher: Royal Society of Chemistry (RSC)
    Publication Date: 2021
    detail.hit.zdb_id: 2702232-8
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