Co9S8@MoS2 core-shell nanostructure anchored on reduced graphene oxide with improved electrochemical performance for lithium-ion batteries

Ren, Haibo; Gu, Cuiping; Zhao, Jingjuan; Joo, Sang Woo; Huang, Jiarui

doi:10.1016/j.apsusc.2018.12.257

Cited by 37 publications

(9 citation statements)

References 70 publications

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“…Meanwhile, a broad peak at 235.7 eV of Mo 6+ was indicative of the existence of oxidized phases (i.e., Mo 6+ ) (Hou et al, 2018). As observed from Figure 5C, two pairs of peaks were the features of Co 2+ (Co 2p 1/2 at 799.5 eV and Co 2p 3/2 at 782.8 eV) and Co 3+ (Co 2p 1/2 at 788 eV and Co 2p 3/2 at 779.6 eV) (Ren, et al, 2019). Moreover, two peaks located at 804.4 and 784.8 eV were the shakeup satellites (Hou et al, 2018).…”

Section: Morphologies and Microstructures Of The Nanocompositesmentioning

confidence: 75%

“…The second weight loss of the sample occurred at 180-482 °C, which is due to the oxidation of the metal sulfides by O 2 in the air. Ultimately, as the temperature continues to rise, the decomposition of carbon in MoS 2 /Co 9 S 8 /C nanohybrids is accompanied by releasing of CO 2 (Ren et al, 2019). The result of TGA curve showed that the carbon mass percentage in MoS 2 /Co 9 S 8 /C was about 6.1%.…”

Section: Morphologies and Microstructures Of The Nanocompositesmentioning

confidence: 98%

“…Figures 6A-C showed the cyclic 6A, in the first cathode scan, we can observe that MoS 2 /Co 9 S 8 /C has four reduction peaks at 0.47, 1.08, 1.18, and 1.33 V, respectively, revealing a multistep electrochemical reaction. The two peaks located at 1.18 and 1.33 V can be ascribed to the reduction of Co 9 S 8 to metallic Co (Zhao et al, 2018;Ren et al, 2019). Also, the strong peak at 1.08 V is the result of the intercalation of lithium ions into the MoS 2 layer, while the pronounced reduction peak at 0.47 V in the first cycle was identified to the reduction of Li x MoS 2 and the formation of a solid electrolyte interphase (SEI) layer (Ren et al, 2019).…”

Section: Electrochemical Performancesmentioning

confidence: 99%

“…The two peaks located at 1.18 and 1.33 V can be ascribed to the reduction of Co 9 S 8 to metallic Co (Zhao et al, 2018;Ren et al, 2019). Also, the strong peak at 1.08 V is the result of the intercalation of lithium ions into the MoS 2 layer, while the pronounced reduction peak at 0.47 V in the first cycle was identified to the reduction of Li x MoS 2 and the formation of a solid electrolyte interphase (SEI) layer (Ren et al, 2019). During the reverse anodic sweep of the MoS 2 / Co 9 S 8 /C, two intensive peaks at 2.05 and 2.29 V could be attributed to the oxidation of metallic Co and Mo, respectively (Geng et al, 2017).…”

Section: Electrochemical Performancesmentioning

confidence: 99%

“…Nevertheless, the practical application of commercial graphite-based anodes have been frustrated due to their low theoretical capacity of 372 mAh g −1 (Zhou et al, 2014;Wang et al, 2017;Zhang et al, 2018). In the context of developing highly efficient energy storage electrode materials, extensive research has been conducted on various advanced anode materials, including metal oxides, metal sulfides, and their composites (Ren et al, 2019;Tao et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

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Self-assembly synthesis of petal-like MoS2/Co9S8/carbon nanohybrids for enhanced lithium storage performance

Liu

et al. 2022

Front. Energy Res.

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Transition metal sulfides are favored as anode materials for the next generation of lithium-ion batteries because of their high theoretical capacities and abundant natural resources. However, serious volume changes during charging and discharging pose great challenges to their stability. In this work, petal-like MoS2/Co9S8/C nanohybrids were synthesized via the immobilization of molybdyl acetoacetonate MoO2(acac)2 in ZIF-67 and subsequent combined vulcanization and thermolysis process. Benefiting from the homogeneous bimetallic sulfide and highly conductive carbon layer, the as-obtained MoS2/Co9S8/C nanohybrids exhibited a high initial discharge capacity of 988.3 mAh g−1 at 200 mA g−1 and a capacity retention > 99.9% after 50 cycles. Even at a high current density of 1000 mA g−1, the reversible capacity of MoS2/Co9S8/C is still as high as 754.6 mAh g−1, revealing extraordinary rate ability. This work can provide a general approach to design and synthesize other advanced bimetallic chalcogenides for boosting lithium-ion batteries storage performance.

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Section: Morphologies and Microstructures Of The Nanocompositesmentioning

confidence: 75%

Section: Morphologies and Microstructures Of The Nanocompositesmentioning

confidence: 98%

Section: Electrochemical Performancesmentioning

confidence: 99%

Section: Electrochemical Performancesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Self-assembly synthesis of petal-like MoS2/Co9S8/carbon nanohybrids for enhanced lithium storage performance

Liu

et al. 2022

Front. Energy Res.

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Functionalized Nanostructured Materials for Supercapacitor Applications

Moharana,

Sahu,

Nayak

et al. 2024

Nanostructured Materials for Energy Storage

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Multielectron Conversion: Peculiar Transition Metal Sulfides with Mixed Vulcanized States toward High‐Capacity Metal‐Ion Storage

Song

Wang

et al. 2023

Advanced Energy Materials

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Transition metal sulfides with mixed vulcanized states (TMS-mVs) possess tremendous potential to realize highcapacity, superior redox reactions, and structural reversibility for metal-ion (M n+ ) storage owing to their multielectron reactions caused by the simultaneous participation of transition metal (TM) cations and S 2 2− anions as well as multifarious TM or S valence states. Here, recent advances are systematically introduced regarding the mainstream TMS-mVs that can be applied to M n+ storage. These TMS-mVs can be divided into two categories of TMS, those with mixed sulfur-valence states (TMS-mSs) and those with mixed metal-valence states (TMS-mMs). It is found that TMS-mV anodes mainly experience three reaction mechanisms, inculding insertion-accompanied conversion, insertion, and conversion reactions. During the reversible charge process, Li 2 S is possibly oxidized into polysulfides or even S. TMS-mVs have the ability to transfer more electrons than other homogeneous TMSs. TMS-mS anodes usually present higher theoretical specific capacities than TMS-mM anodes. In these TMS-mV anodes, Mo-based, V-based, and Co-based TMS-mM anodes exhibit good electrochemical reversibility, Ni-based TMS-mM anodes exhibit moderate electrochemical reversibility, and Fe-based TMS-mM and TMS-mS anodes exhibit poor electrochemical reversibility. The strategies for enhancement of their electrochemical performance are classified into composite, coating, nanostructure, heterointerface, and lattice engineering.

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Co9S8@MoS2 core-shell nanostructure anchored on reduced graphene oxide with improved electrochemical performance for lithium-ion batteries

Cited by 37 publications

References 70 publications

Self-assembly synthesis of petal-like MoS2/Co9S8/carbon nanohybrids for enhanced lithium storage performance

Self-assembly synthesis of petal-like MoS2/Co9S8/carbon nanohybrids for enhanced lithium storage performance

Functionalized Nanostructured Materials for Supercapacitor Applications

Multielectron Conversion: Peculiar Transition Metal Sulfides with Mixed Vulcanized States toward High‐Capacity Metal‐Ion Storage

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