Metal-organic frameworks derived germanium oxide nanosheets for large reversible Li-ion storage

Zhang, Wenbo; Pang, Huicong; Sun, Weiwei; Lv, Liping; Wang, Yong

doi:10.1016/j.elecom.2017.09.019

Cited by 26 publications

(10 citation statements)

References 36 publications

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“…The superior cycling performance of the post-treated samples can be ascribed to an enhanced reversibility of the conversion reaction of GeO 2 in the presence of elemental Ge nanostructures. Notably, the measured specific capacity surpasses reported literature values of 1564 mA h g –1 for the Li-richest phase Li 17 Ge 4 in bulk Ge anodes. , …”

Section: Results and Discussioncontrasting

confidence: 47%

“…Notably, the measured specific capacity surpasses reported literature values of 1564 mA h g −1 for the Li-richest phase Li 17 Ge 4 in bulk Ge anodes. 32,33 Findings from the morphological and compositional characterization give strong indication that the high specific capacity of over 2000 mA h g −1 is primarily caused by two different influences: the enhanced mesoporous structure of the Ge-based samples and the increased oxidation induced through the applied PT. The mesoporous nature of the samples immensely boosts the surface-to-volume ratio as compared to bulk materials.…”

Section: Resultsmentioning

confidence: 99%

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Mesoporous GeO_x/Ge/C as a Highly Reversible Anode Material with High Specific Capacity for Lithium-Ion Batteries

Hohn

Wang

Giebel

et al. 2020

ACS Appl. Mater. Interfaces

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Nanostructured Ge is considered a highly promising material for Li-ion battery applications as Ge offers high specific capacity and Li-ion diffusivity, while inherent mesoporous nanostructures can contribute resistance against capacity fading as typically induced by high volume expansion in bulk Ge films. Mesoporous GeO x /Ge/C films are synthesized using K 4 Ge 9 Zintl clusters as a Ge precursor and the amphiphilic diblock copolymer polystyrene-block-polyethylene oxide as a templating tool. As compared to a reference sample without post-treatment, enhanced surface-to-volume ratios are achieved through post-treatment with a poor-good azeotrope solvent mixture. High capacities of over 2000 mA h g −1 are obtained with good stability over 300 cycles. Information from morphological and compositional characterization for both reference and post-treated sample suggests that the good electrochemical performance originates from reversible GeO 2 conversion reactions.

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Section: Results and Discussioncontrasting

confidence: 47%

Section: Resultsmentioning

confidence: 99%

Mesoporous GeO_x/Ge/C as a Highly Reversible Anode Material with High Specific Capacity for Lithium-Ion Batteries

Hohn

Wang

Giebel

et al. 2020

ACS Appl. Mater. Interfaces

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“…Germanium monochalcogenides and dichalcogenides have more unique layered structures and alkali metal storage mechanisms, guaranteeing a higher capacity and higher rate performance as anode materials. In 2017, Wang et al 305 reported the first fabrication of GeO 2 nanosheets using a Ge‐based metal–organic framework (MOF) [C 6 H 10 (NH 2 ) 2 Ge 3 O 6 ] as the precursor and applying the electrochemical performance of MOF‐derived GeO 2 nanosheets for LIBs. The obtained GeO 2 nanosheets delivered an initial reversible capacity of 1315 mAh g −1 at 0.1 A g −1 and a large charge capacity of 1393 mAh g −1 after 350 cycles.…”

Section: Applications Of Ge‐based 2d Materialsmentioning

confidence: 99%

Germanium‐based monoelemental and binary two‐dimensional materials: Theoretical and experimental investigations and promising applications

Zhao

Feng

2022

InfoMat

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Two-dimensional (2D) materials based on group IVA elements have attracted extensive attention owing to their rich chemical structures and novel properties. This comprehensive review focuses on the phases of Ge monoelemental and binary 2D materials including germanene and its derivatives, Ge-IVA binary compounds, Ge-VA binary compounds, and Ge-VIA binary compounds.The latest progress in predictive modeling, fabrication, and fundamental and physical property modulation of their stable 2D configurations are presented.Accordingly, various interesting applications of these Ge-based 2D materials are discussed, particularly field effect transistors, photodetectors, optical devices, catalysts, energy storage devices, solar cells, thermoelectric devices, sensors, biomedical materials, and spintronic devices. Finally, this review concludes with a few perspectives and an outlook for quickly expanding the application scope Ge-based 2D materials based on recent developments.

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“…[14] For example, Zhang et al synthesized MOF-derived GeO 2 with an initial reversible capacity of 1315 mA h g À 1 at 100 mA g À 1 . [15] Sun et al synthesized CoÀ Zn-Se@C by Co/Zn-MOF-74 with an initial discharge/charge capacity of~1393 and~1020 mA h g À 1 at 1000 mA g À 1 . [11] The third one is incorporation of carbon materials to form TMSs/C composites.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Electrochemical Performance of CoSe₂−MnSe₂ for Application in Lithium‐Ion Batteries

Zheng

et al. 2020

ChemElectroChem

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In recent years, lithium‐ion batteries (LIBs) have been widely used in many fields, and research on LIBs electrode materials have attracted much attention. Among them, transition metal selenides (TMSs) are the most promising candidates in the next generation LIBs due to their high theoretical specific capacity and electrical conductivity. However, poor cycle stability and severe volume variation result in serious capacity decay during the charge/discharge process, limiting the practical application. In this paper, CoSe2−MnSe2 composites are synthesized via Co−Mn‐based metal‐organic framework (MOF) precursor. Meanwhile, three types of materials are successfully synthesized including CoSe2‐MnSe2@reduced graphene oxide (rGO), CoSe2‐MnSe2@polypyrrole (PPy), and CoSe2‐MnSe2/glucose (C). According to the electrochemical test results, it can be seen that the electrochemical performance of CoSe2−MnSe2 has been improved significantly. CoSe2‐MnSe2@rGO electrode materials, in particular, of which the inactivation defect sites and special carbon structure of rGO could provide more attachment points for ions. Due to the perfect combination of rGO and CoSe2−MnSe2, the CoSe2‐MnSe2@rGO composites display outstanding rate performance (1266 mA h g−1 at current densities of 100 mA g−1) and high reversible capacity (1169 after 150 cycles at 100 mA g−1). We believe that CoSe2‐MnSe2@rGO is a kind of very promising anode material.

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Metal-organic frameworks derived germanium oxide nanosheets for large reversible Li-ion storage

Cited by 26 publications

References 36 publications

Mesoporous GeO_x/Ge/C as a Highly Reversible Anode Material with High Specific Capacity for Lithium-Ion Batteries

Mesoporous GeO_x/Ge/C as a Highly Reversible Anode Material with High Specific Capacity for Lithium-Ion Batteries

Germanium‐based monoelemental and binary two‐dimensional materials: Theoretical and experimental investigations and promising applications

Preparation and Electrochemical Performance of CoSe₂−MnSe₂ for Application in Lithium‐Ion Batteries

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Metal-organic frameworks derived germanium oxide nanosheets for large reversible Li-ion storage

Cited by 26 publications

References 36 publications

Mesoporous GeOx/Ge/C as a Highly Reversible Anode Material with High Specific Capacity for Lithium-Ion Batteries

Mesoporous GeOx/Ge/C as a Highly Reversible Anode Material with High Specific Capacity for Lithium-Ion Batteries

Germanium‐based monoelemental and binary two‐dimensional materials: Theoretical and experimental investigations and promising applications

Preparation and Electrochemical Performance of CoSe2−MnSe2 for Application in Lithium‐Ion Batteries

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Mesoporous GeO_x/Ge/C as a Highly Reversible Anode Material with High Specific Capacity for Lithium-Ion Batteries

Mesoporous GeO_x/Ge/C as a Highly Reversible Anode Material with High Specific Capacity for Lithium-Ion Batteries

Preparation and Electrochemical Performance of CoSe₂−MnSe₂ for Application in Lithium‐Ion Batteries