Synthesis of graphene wrapped porous CoMoO<sub>4</sub> nanospheres as high-performance anodes for rechargeable lithium-ion batteries

Lyu, Donghao; Zhang, Lingling; Wei, Huaixin; Geng, Hongbo; Gu, Hongwei

doi:10.1039/c7ra09284a

Cited by 28 publications

(13 citation statements)

References 43 publications

(41 reference statements)

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“…[8] Lyu and coworkers prepared the CoMoO 4 @graphene nanosphere, which delivered a high specific discharge capacity of 783 mA h g À 1 after 150 cycles at 0.5 A g À 1 . [9] However, the improvements to its low electronic conductivity and sluggish Li + diffusion are still limited through the nanostructuring method, and the huge volume changes caused by the insertion/extraction of Li + would inevitably lead to the collapse of the crystals. [10] Thus, it remains challenges for CoMoO 4 to be successfully applied as commercial anode material for LIBs.…”

Section: Introductionmentioning

confidence: 99%

“…For example, Chen and co‐workers reported the fabrication of CoMoO 4 /carbon cloth with a high specific capacity of 764 mA h g −1 after 1000 cycles at 1200 mA g −1 [8] . Lyu and co‐workers prepared the CoMoO 4 @graphene nanosphere, which delivered a high specific discharge capacity of 783 mA h g −1 after 150 cycles at 0.5 A g −1 [9] . However, the improvements to its low electronic conductivity and sluggish Li + diffusion are still limited through the nanostructuring method, and the huge volume changes caused by the insertion/extraction of Li + would inevitably lead to the collapse of the crystals [10] .…”

Section: Introductionmentioning

confidence: 99%

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Tailoring Oxygen Vacancies in CoMoO₄ for Superior Lithium Storage

et al. 2020

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The application of transition-metal oxides in the energy storage field is hampered by its low electronic conductivity, sluggish Li + diffusion, and huge volume changes. The construction of oxygen vacancy defects can effectively modify the electronic structure of the active materials, accelerating the charge transfer process. Herein, the CoMoO 4 nanorods with different oxygen vacancy concentrations are synthesized through the facile calcination process under N 2 and Air atmospheres. The ultraviolet-visible diffuse reflectance spectroscopy (UV-Vis DRS) analysis and Density Functional Theory (DFT) calculation results confirm that the bandgap reduces along with the increment of the oxygen vacancy content. The CoMoO 4-N 2 with higher oxygen vacancy concentration exhibits more superior electrochemical performance than CoMoO 4-Air, which delivers an ultrahigh specific capacity (999 mA h g À 1 after 500 cycles at 0.5 A g À 1), remarkable rate capacity (477 mA h g À 1 at 9 A g À 1), and excellent cycling stability (650 mA h g À 1 after 1000 cycles at 2 A g À 1).

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Tailoring Oxygen Vacancies in CoMoO₄ for Superior Lithium Storage

et al. 2020

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“…In addition, the unique porous morphology can accommodate the volume change, leading to excellent cycling stability 16,17 . Meanwhile, hybridization of CoMoO 4 with carbon‐based materials significantly improves the conductivity and allows a large specific surface area 19,20 . Gaoxue Jiang et al reported rod‐like CoMoO 4 @carbon using a hydrothermal procedure.…”

Section: Introductionmentioning

confidence: 99%

Nitrogen‐doped reduced graphene oxide incorporated porous rod‐like cobalt molybdate as an anode for high‐capacity long‐life lithium‐ion batteries

et al. 2021

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Summary Modification of volume expansion and poor conductivity of ternary metal molybdates as an anode for lithium‐ion batteries (LIBs) results in the improvement of their reversibility and rate capability. Herein, porous rod‐like cobalt molybdate incorporated with nitrogen (N) doped reduced graphene oxide (rGO) was fabricated using a silicone oil‐bath method and further heated at 500°C (designated as CMO500@N‐G) and 600°C (CMO600@N‐G). The well‐designed CMO500@N‐G and CMO600@N‐G electrodes were explored as an anode for LIBs. Notably, the CMO500@N‐G electrode exhibited a discharge capacity of 612 mA h g−1 over 250 cycles at 100 mA g−1, while the CMO600@N‐G was restricted to 199.5 mA h g−1. Besides, the CMO500@N‐G electrode was sustained for 2000 cycles with a remarkable discharge capacity of 665 mA h g−1 even at a high current density of 1000 mA g−1. Finally, using a newly developed CMO500@N‐G anode, a full cell LIB was also fabricated and showed good reversibility and excellent rate performance. This outstanding performance of the electrode can be ascribed to the unique rod‐like morphology of cobalt molybdate with a highly conductive N doped rGO, which suggests a new strategy to fabricate high‐capacity anode materials for LIBs.

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“…Then, to improve the performance of the electrode, scientists have designed hybrid electrodes where carbon cloths/graphene layers or graphene oxide have been used as supporting structure of NiMoO4 [14][15]. Then, Lyu et al [16] and Xu et al [17] have fabricated graphene wrapped CoMoO4 nanospheres by hydrothermal and lotus root-like CoMoO4@graphene nanofibers by electrospinning methods, respectively. Although various strategies about optimizing the composition, the structure and the morphology of the metal molybdate powders have been studied, upto now no research has been published about the use of quaternary molybdate powders as electrodes for lithium ion batteries. Herein, Ni and Co are explicitly chosen to combine with molybdenum and oxygen not only because of their similar physical and electrochemical properties but also their structural resemblances.…”

Section: Introductionmentioning

confidence: 99%

Comparative Study about Differently Structured Transitional Metal Molybdates as Negative Electrodes for LIBs

Karahan

2020

Sakarya University Journal of Science

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The nanostructured materials represent the center of fundamental advances to design new era electrodes for high energy density batteries. Especially, one-dimensional nanomaterials are recognized as a solution due to their large surface area, short diffusion distance and high volume accommodation ability. In this sense, first in literature a comparative study has been done to examine the electrochemical performances of differently fabricated transition metal oxide molybdate powders: lithium storage capabilities of nickelcobalt-molybdate composite is compared to that of the cobalt oxide decorated nickel molybdate powders. To measure the effect of cobalt atom, bare nickel molybdate powders have been also fabricated and tested. The lithiation mechanism of these electrodes are discussed based on the cyclic voltammetry curvatures. SEI layer formation on the electrodes and the electrode/electrolyte stability upon cycling are analyzed following the electrochemical impedance spectroscopy test results (after 1st, 2nd and 4th cycles). The results reveal that the addition of cobalt changes the powder morphology and improves the electrochemical performance of the electrode. Among three samples, the cobalt oxide decorated nickel molybdate performs higher retention and rate performance since the top layer promotes more stable electrode/electrolyte interface providing a capacity of 290 mAh/g after 100 cycles. The rate performance of the sample is also found promising, the electrode delivers 200 mAh/g even under a current load of 400mA/g.

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Synthesis of graphene wrapped porous CoMoO₄ nanospheres as high-performance anodes for rechargeable lithium-ion batteries

Abstract: Herein, we described a facile method to synthesise porous CoMoO4 nanospheres wrapped with graphene (CoMoO4@G).

Cited by 28 publications

References 43 publications

Tailoring Oxygen Vacancies in CoMoO₄ for Superior Lithium Storage

Tailoring Oxygen Vacancies in CoMoO₄ for Superior Lithium Storage

Nitrogen‐doped reduced graphene oxide incorporated porous rod‐like cobalt molybdate as an anode for high‐capacity long‐life lithium‐ion batteries

Comparative Study about Differently Structured Transitional Metal Molybdates as Negative Electrodes for LIBs

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Synthesis of graphene wrapped porous CoMoO4 nanospheres as high-performance anodes for rechargeable lithium-ion batteries

Abstract: Herein, we described a facile method to synthesise porous CoMoO4 nanospheres wrapped with graphene (CoMoO4@G).

Cited by 28 publications

References 43 publications

Tailoring Oxygen Vacancies in CoMoO4 for Superior Lithium Storage

Tailoring Oxygen Vacancies in CoMoO4 for Superior Lithium Storage

Nitrogen‐doped reduced graphene oxide incorporated porous rod‐like cobalt molybdate as an anode for high‐capacity long‐life lithium‐ion batteries

Comparative Study about Differently Structured Transitional Metal Molybdates as Negative Electrodes for LIBs

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Synthesis of graphene wrapped porous CoMoO₄ nanospheres as high-performance anodes for rechargeable lithium-ion batteries

Tailoring Oxygen Vacancies in CoMoO₄ for Superior Lithium Storage

Tailoring Oxygen Vacancies in CoMoO₄ for Superior Lithium Storage