Engineering of Co9S8–CoS nanoparticles encapsulated into N-doped graphitic carbon tubes for high-performance lithium storage

Ma, Xudong; Fang, Kaixin; Yang, Xinyi; Jiang, Jiyong; Meng, Lingkai; Wu, Xuehang

doi:10.1016/j.jallcom.2019.152859

Cited by 12 publications

(4 citation statements)

References 54 publications

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“…Currently cobalt sulfides face several challenges, including poor rate performance caused by their inferior electric/ionic conductivity, inadequate cycling life originating from the large volume expansion that occurred during lithiation [19], and low initial columbic efficiency, which is the common issue of transition reaction based electrode materials. Elaborate nano-structures, including hierarchitectures [20], hollow nanoparticles [21], nanosheets [22], nanotubes [23], etc., have been introduced to shorten the electron/ion transport path and house the volume expansion, whereas the inherent poor conductivity of cobalt sulfides still limits the rate of electron transfer [21,24].…”

Section: Introductionmentioning

confidence: 99%

CoS Nanosheets Coated with Dopamine-Derived Carbon Standing on Carbon Fiber Cloth as Binder-Free Anode for Li-ion Batteries

Ji¹,

Shi²,

Feng³

et al. 2024

JRM

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Cobalt sulphides attract much attention as anode materials for Li-ion batteries (LIBs). However, its poor conductivity, low initial column efficiency and large volume changes during cycling have hindered its further development. Herein, novel interlaced CoS nanosheets were firstly prepared on Carbon Fiber Cloth (CFC) by two hydrothermal reactions followed with carbon coating via carbonizing dopamine (CoS NS@C/CFC). As a freestanding anode, the nanosheet structure of CoS not only accommodates the volume variation, but also provides a large interface area to proceed the charge transfer reaction. In addition, CFC works as both a three-dimensional skeleton and an active substance which can further improve the areal capacity of the resulting electrode. Furthermore, the coated carbon combined with the CFC work as a 3D conductive network to facilitate the electron conduction. The obtained CoS NS@C/CFC, and the contrast sample prepared with the same procedure but without carbon coating (CoS NS/CFC), are characterized with XRD, SEM, TEM, XPS and electrochemical measurements. The results show that the CoS NS@C/CFC possesses much improved electrochemical performance due to the synergistic effect of nanosheet CoS, the coated carbon and the CFC substrate, exhibiting high initial columbic efficiency (~87%), high areal capacity (2.5 at 0.15 mA cm −2 ), excellent rate performance (1.6 at 2.73 mA cm −2 ) and improved cycle stability (87.5% capacity retention after 300 cycles). This work may provide a new route to explore freestanding anodes with high areal specific capacity for LIBs.

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Section: Introductionmentioning

confidence: 99%

CoS Nanosheets Coated with Dopamine-Derived Carbon Standing on Carbon Fiber Cloth as Binder-Free Anode for Li-ion Batteries

Ji¹,

Shi²,

Feng³

et al. 2024

JRM

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“…Then, it decreased to 485.24 mAh·g –1 , and the long voltage plateaus could be observed between 0.84 and 1.00 V. Nearly 1.67% of the discharge capacity decayed due to the formation of the SEI films caused by the irreversible potassium trapping and electrolyte decomposition. However, the charge–discharge charts began to keep steady in the following cycles, which meant that the formed SEI films tended to remain steady …”

Section: Results and Discussionmentioning

confidence: 99%

“…However, the charge−discharge charts began to keep steady in the following cycles, which meant that the formed SEI films tended to remain steady. 38 Figure 5a displays the cycling performances at a current density of 500 mA•g −1 of the Co 9 S 8 /GF and CoS/GF nanocomposite electrodes within 0.30−2.90 V for KIBs, while Figure S6 shows the cycling performance of GF at 500 mA•g −1 within 0.30−2.90 V. At the beginning, the discharge capacities were quite unstable and had obvious fluctuations. However, when the number of cycles increased, the curves of the two electrodes were relatively smooth.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Polymorphic Cobalt Sulfide-Embedded Graphene Foam with Ultralong Cycling and Ultrafast Rate Capability for Potassium-Ion Batteries

Zhang

Shen

2023

ACS Sustainable Chem. Eng.

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Potassium-ion batteries (KIBs) attract growing attention due to their low price and abundant resources. However, the main drawback is the large-sized potassium ions, which results in a lack of superior capacity and desirable stable materials. We herein propose the Co 9 S 8 /GF nanocomposite synthesized by a solvothermal route followed by heat treatment under the reduction atmosphere with the CoS/GF nanocomposite as the control group. The as-synthesized Co 9 S 8 has a typical morphology of vertically arranged uniform nanosheet arrays. The Co 9 S 8 /GF nanocomposite electrode delivers a capacity of 345.65 mAh•g −1 after 600 cycles at 500 mA•g −1 and even 343.06 mAh•g −1 after 1360 cycles at 5000 mA•g −1 in KIBs. Besides, the discharge capacity can reach 461.05 mAh•g −1 after the current increases to 5000 mA•g −1 and a reversible capacity of 578.40 mAh•g −1 when the current density recovers to 250 mA•g −1 again. At last, the charge storage behaviors are mainly discussed, and the unique structure can suffer the volumetric change, especially at high current density, which opens up a novel and effective way to build the embedded porous structure for the next-generation KIB technology.

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“…Due to the increase of the energy crisis and environmental pollution, better secondary batteries with excellent electrochemical performance and low manufacturing cost are in urgent demand to satisfy the power of various flexible electronics and electric and hybrid electric vehicles, intelligent grids, and so on. − At present, Li-ion batteries (LIBs) are still the first choice of secondary batteries due to the improvement of electrochemical performance. − Compared with the current commercial electrode materials, transition metal sulfides can deliver much better electrochemical performance than carbon anodes in LIBs. − Among them, iron sulfides are of particular interest owing to their high theoretical capacity, environmental benignity, naturally abundant reserves, and low cost compared with transition metal oxides. ,− However, iron sulfides have intrinsic low conductivity and suffer from large volume changes during the conversion reaction. Besides, the shuttle effect of polysulfide Li 2 S x (2 < x < 8) also results in the deterioration of the electrochemical performance of iron sulfides.…”

Section: Introductionmentioning

confidence: 99%

Rational Synthesis of Fern Leaf-like FeS₂@Sulfur-Doped Carbon as an Anode for Superior Lithium-Ion Batteries

Chen

Zhang

et al. 2021

Energy Fuels

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Fern leaf-like FeS2@sulfur-doped carbon (SC) composites are synthesized through a sulfuration process using fern leaf-like γ-Fe2O3@C as the raw material. The design of combining fern leaf-like FeS2 with SC layers is favorable to enhancing the electronic conductivity of FeS2 and buffering the severe volume change associated with the pulverization issue that exists in most metal sulfide-based electrodes. When the fern leaf-like FeS2@SC composite serves as an anode for lithium-ion batteries, it can deliver high first discharge capacities of 1656.6 and 1364.7 mA h g–1 at a low density of 0.1 A g–1 and a high current density of 5 A g–1. Besides, benefiting from the structural advantages, the FeS2@SC composite shows superior rate capability (442.5 mA h g–1 at 5 A g–1) and cyclability (848.9 mA h g–1 at 1 A g–1 after 300 cycles, corresponding to 89.14% of the second discharge specific capacity). The enhanced electrochemical performance of FeS2@SC can be ascribed to the synergistic effect of the hierarchical fern leaf-like FeS2 microstructure and the sulfur-doped carbon coating layer.

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Engineering of Co9S8–CoS nanoparticles encapsulated into N-doped graphitic carbon tubes for high-performance lithium storage

Cited by 12 publications

References 54 publications

CoS Nanosheets Coated with Dopamine-Derived Carbon Standing on Carbon Fiber Cloth as Binder-Free Anode for Li-ion Batteries

CoS Nanosheets Coated with Dopamine-Derived Carbon Standing on Carbon Fiber Cloth as Binder-Free Anode for Li-ion Batteries

Polymorphic Cobalt Sulfide-Embedded Graphene Foam with Ultralong Cycling and Ultrafast Rate Capability for Potassium-Ion Batteries

Rational Synthesis of Fern Leaf-like FeS₂@Sulfur-Doped Carbon as an Anode for Superior Lithium-Ion Batteries

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Engineering of Co9S8–CoS nanoparticles encapsulated into N-doped graphitic carbon tubes for high-performance lithium storage

Cited by 12 publications

References 54 publications

CoS Nanosheets Coated with Dopamine-Derived Carbon Standing on Carbon Fiber Cloth as Binder-Free Anode for Li-ion Batteries

CoS Nanosheets Coated with Dopamine-Derived Carbon Standing on Carbon Fiber Cloth as Binder-Free Anode for Li-ion Batteries

Polymorphic Cobalt Sulfide-Embedded Graphene Foam with Ultralong Cycling and Ultrafast Rate Capability for Potassium-Ion Batteries

Rational Synthesis of Fern Leaf-like FeS2@Sulfur-Doped Carbon as an Anode for Superior Lithium-Ion Batteries

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Rational Synthesis of Fern Leaf-like FeS₂@Sulfur-Doped Carbon as an Anode for Superior Lithium-Ion Batteries