Self-assembly flower-like porous carbon nanosheet powders for higher lithium-ion storage capacity

Ma, Zhen; Cui, Yan; Zuo, Xiaoxi; Sun, Yan–Hui; Xiao, Xin; Nan, Junmin

doi:10.1016/j.electacta.2015.09.098

Cited by 20 publications

(13 citation statements)

References 35 publications

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“…During the negatively scanning, 2 reduction peaks were detected at about 0.6 V and 0 V, corresponding to the formation of SEI film [28][29], and the intercalation of Li + within the inter layers and the defects of RGO nanosheets (such as pores, vacancies and edges), respectively [30][31]. Meanwhile, during the positively scanning, 2 oxidation peaks at about 0.3 V and 1.5 V were also observed, which can be ascribed to the extraction of Li + from RGO nanosheets and the defects (such as pores, vacancies and edges), respectively [31][32][33]. Fig.…”

Section: CVmentioning

confidence: 84%

Binder-free combination of large area reduced graphene oxide nanosheets with Cu foil for lithium ion battery anode

Liu

Wang

Hou

et al. 2016

Diamond and Related Materials

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Section: CVmentioning

confidence: 84%

Binder-free combination of large area reduced graphene oxide nanosheets with Cu foil for lithium ion battery anode

Liu

Wang

Hou

et al. 2016

Diamond and Related Materials

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“…28,29 The small increase mentioned above was related to the lithiation on the surface (Fig. 28,29 The small increase mentioned above was related to the lithiation on the surface (Fig.…”

Section: Electrochemical Performancesmentioning

confidence: 91%

“…As depicted in Table 1, the F-r-GC without any oxidation treatment exhibits a coulombic efficiency of 74.9% at the first cycle, indicating that a certain amount of Li + cannot extract because of inherent confines in EG. 28,29 In addition, the r-GC exhibited the lowest initial coulombic efficiency of 63.3%. 2) and the restacking of graphite nano-fragments.…”

Section: Electrochemical Performancesmentioning

confidence: 98%

“…24 The stable specific capacity reached 552 mAh g -1 at 50 mA g -1 and 520 mAh g -1 at 500 mA g -1 . 28,29 Two reconstructed graphene-like nano-materials were prepared through spray drying the suspension of graphite oxide nanomaterials, which exhibited initial capacities of 903 mAh g -1 and 802 mAh g -1 . 27 Unfortunately, although all these materials show a higher capacity, they sacrifice the low voltage plateau as graphite does.…”

Section: Introductionmentioning

confidence: 99%

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A reconstructed graphite-like carbon micro/nano-structure with higher capacity and comparative voltage plateau of graphite

Cui

Xiao

et al. 2016

J. Mater. Chem. A

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A reconstructed graphite-like carbon (r-GC) micro/nano-structure with a higher capacity than and a comparative voltage plateau to commercial graphite anode of lithium-ion batteries (LIBs) is synthesized from expandable graphite raw material based on an up-down-up synthetic strategy. The expandable graphite powders are thermally expanded, hydrothermally cut, and ultrasonically crushed in turn to prepare a suspension containing nano-fragments with graphitic plane nano-structure as a carbon precursor. Then, the r-GC micro/nano-structure can be obtained by stacking the graphite nano-fragments through spray drying the suspension and subsequently conducting calcining treatment. This r-GC exhibits an initial capacity of 575.3 mAh g -1 at 0.1 C and a reversible capacity of 508.4 mAh g -1 after 100 cycles. Especially, its comparative voltage plateau of commercial graphite is incapable for other known anode materials of LIBs. In the potential window of 0.3-0.01 V (vs. Li + /Li), a maximum capacity of approximately 432.1 mAh g -1 , 1.16 times the theoretical capacity of graphite (372 mAh g -1 ), is obtained. The unique element stability, capacity, and voltage plateau indicate that the as-synthesized r-GC is a promising sheet-like anode material of LIBs. In addition, an embedded-defects and graphite-dominant graphite/graphene cooperative lithiation mechanism is proposed to elaborate the capacity and voltage plateau of r-GC. 5 through an up-down-up process, we synthesized a new reconstructed graphite-like carbon (r-GC) micro/nano-structure by restacking the graphite nano-fragments using expandable graphite powders as raw material. More importantly, it has been found that this r-GC exhibits a similar voltage plateau and an enhanced lithiation/delithiation capacity of graphite anode material. These results indicate that the as-synthesized r-GC can match the demand of LIBs with a higher energy, and the synthetic strategy opens up the possibility of manufacturing higher-capacity anode materials, particularly for sheet-like carbon-based materials. In this paper, the synthesis and characterization of r-GC are presented. In addition, an embedded-defects and graphite-dominant graphite/graphene cooperative lithiation mechanism is put forward to elaborate the higher capacity and low plateau of r-GC. Experimental section Synthesis of the r-GCExpandable graphite raw material, with an expansion ratio of 30 mL g -1 at 500 °C in air, was obtained from LiChang New Material Co. Ltd. (Dalian, China). After a high-temperature treatment, 0.5 g of expanded graphite (EG) was added into a 150-mL hydrothermal reactor with polytetrafluoroethylene lining. Afterwards, 30 mL H 2 O 2 (30 wt%) and 90 mL HNO 3 (5 mol L -1 ) were poured into the reactor, and then, the sealed reactor was transferred to an oven at 160 °C for 25 h. An ethanol/H 2 O (1:1 in volume) mixture was used to wash the hydrothermal product. Subsequently, the washed product was further ultrasonically crushed in 150 mL ethanol using an ultrasonic pulverizer (400 Results and discussionExpa...

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“…Similar principles apply to electrode materials that are made up of carbon only, typically as negative electrodes for Li-ion or Na-ion batteries [25,26,27,28,29,30,31,33,35] or as hosting material in Li-O 2 or Li-S batteries [23,24,32,34]. …”

Section: Formulation Of Solutions/suspensions: Organic/carbon Compmentioning

confidence: 99%

Spray-Drying of Electrode Materials for Lithium- and Sodium-Ion Batteries

et al. 2018

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The performance of electrode materials in lithium-ion (Li-ion), sodium-ion (Na-ion) and related batteries depends not only on their chemical composition but also on their microstructure. The choice of a synthesis method is therefore of paramount importance. Amongst the wide variety of synthesis or shaping routes reported for an ever-increasing panel of compositions, spray-drying stands out as a versatile tool offering demonstrated potential for up-scaling to industrial quantities. In this review, we provide an overview of the rapidly increasing literature including both spray-drying of solutions and spray-drying of suspensions. We focus, in particular, on the chemical aspects of the formulation of the solution/suspension to be spray-dried. We also consider the post-processing of the spray-dried precursors and the resulting morphologies of granules. The review references more than 300 publications in tables where entries are listed based on final compound composition, starting materials, sources of carbon etc.

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Self-assembly flower-like porous carbon nanosheet powders for higher lithium-ion storage capacity

Cited by 20 publications

References 35 publications

Binder-free combination of large area reduced graphene oxide nanosheets with Cu foil for lithium ion battery anode

Binder-free combination of large area reduced graphene oxide nanosheets with Cu foil for lithium ion battery anode

A reconstructed graphite-like carbon micro/nano-structure with higher capacity and comparative voltage plateau of graphite

Spray-Drying of Electrode Materials for Lithium- and Sodium-Ion Batteries

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