Freestanding nano crystalline Tin@carbon anode electrodes for high capacity Li-ion batteries

Guler, Mehmet Oguz; Guzeler, Mustafa; Nalci, Deniz; Singil, Mustafa Mahmut; Alkan, Engin; Doğan, Metin; Güler, Aslıhan; Akbulut, Hatem

doi:10.1016/j.apsusc.2018.02.056

Cited by 16 publications

(8 citation statements)

References 29 publications

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“…The approximate value of j 0 and A' (ECSA) present in the equation can be determined by separate EIS measurement at I DC = 0 or by theoretical equation (1). The area value obtained from Equation (1) was used as an initial value of active surface during the active surface changes calculations.…”

Section: R T F Zmentioning

confidence: 99%

“…Recently new types of conversion materials are intensively investigated as a possible negative electrode replacement for the commonly used graphite. The application of tin, [1] germanium, [2] aluminum [3] and silicon [4] is the main research direction. In contrast with graphite, all these materials present a very high specific capacity, as well as a high volume change during a lithium uptake.…”

Section: Introductionmentioning

confidence: 99%

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A New Technique for In Situ Determination of the Active Surface Area Changes of Li–Ion Battery Electrodes

Ratyński

Hamankiewicz

Buchberger

et al. 2020

Batteries & Supercaps

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Li‐ion batteries have been of a great interest for over three decades. A geometric electrode surface area is generally used for Li‐ion electrochemical parameters calculations. Since the real electrode is a complex system composed of the thick porous structure, the contact surface area between the active mass and electrolyte is far larger than geometrical. This approximation leads to a large deviation of obtained results, especially within different laboratories and for volume and surface changing materials, e. g., silicon. The article presents a new method of in situ analysis of active surface area variations applicable for Li‐ion electrodes. The method relies on the electrochemical impedance spectroscopy measurement (EIS) performed at an arbitrarily chosen state of charge during superimposed DC current flow. The correlation between a local ion concentration with a charge transfer resistance allows to evaluate the differences of the active surface area. The presented method is not affected by the SEI layer presence, the material composition, nor the lithiation mechanism. Due to limited EIS frequency range the presented method can be performed with a relatively short time. Our new in situ surface area determination can greatly improve the accuracy of the electrochemical parameters evaluation and enable the proper result analysis. We believe that our method can become a standard procedure implemented in every research focusing on the electrochemical parameter determination of the volume changing active materials.

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Section: R T F Zmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A New Technique for In Situ Determination of the Active Surface Area Changes of Li–Ion Battery Electrodes

Ratyński

Hamankiewicz

Buchberger

et al. 2020

Batteries & Supercaps

View full text Add to dashboard Cite

show abstract

“…The tin-based alloy has a theoretical specific capacity of 992 mAh/g [4] , but due to the volume expansion ratio of more than 200% in the process of charging and discharging [5] , it results in the gradual pulverization failure of the material after multiple lithium intercalation and removal, which shows poor cycle stability [6] . At present, the modification of tin-based alloys mainly focuses on the following methods: (1) Combined with the second component to form "Sn-M" alloy [7][8][9] , the formed alloy still has a certain volume expansion; (2) Combined with carbon [10][11][12] , the volume effect of tin is controlled within the material by carbon coating. However, at present, the binding of carbon and tin is poor, the carbon layer is easy to peel off after several cycles, and the cycle performance is rapidly reduced.…”

Section: Introductionmentioning

confidence: 99%

Lithium storage properties of Sn/C composite anode materials

Huang

et al. 2023

J. Phys.: Conf. Ser.

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In this paper, tin-carbon composites were prepared by the hot carbon reduction method and used as anode materials for lithium-ion batteries. The results show that the hot carbon reduction method can effectively reduce SnO2 to spherical metallic tin, and the excess of carbon affects the size and shape of tin spherical particles. The higher the tin content is, the higher the lithium intercalation potential of the anode material is. The improvement of cyclic stability of tin-carbon composites is at the expense of reversible capacity. The core-shell structure of pitch pyrolysis carbon can effectively inhibit the reversible capacity decay caused by tin volume expansion.

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“…It should also lead to improving a lithium ion diffusion pathway between particles. The presence of the carbon phase with embedded tin-based material acts as a stress accommodating phase which preserves volume changes − as well as allows electric contact between tin particles. , There is a variety of Sn-based anode material structures utilizing carbon phase, for example, anchored, layered, core–shell, yolk–shell, and integrated . The source of carbon in such structures may be of a different origin, for example, ordered (graphite), disordered carbons, nanoparticles, or graphene. − …”

Section: Introductionmentioning

confidence: 99%

Nano Tin/Tin Oxide Attached onto Graphene Oxide Skeleton as a Fluorine Free Anode Material for Lithium-Ion Batteries

et al. 2020

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Herein, we show a composite formation method of tin/tin oxide nanoparticles with graphene oxide and CMC based on laser ablation technique as an electrode material for energy storage devices. The material exhibited a three-dimensional conducting graphene oxide network decorated with tin or tin oxide nanoparticles. The structure, homogeneous distribution of nanoparticles, and direct contact between inorganic and organic parts were confirmed by scanning electron microscopy and high-resolution transmission electron spectroscopy. Electrochemical performances of composite electrode material showed a reversible capacity of 644 mAh/g at a current density equal to 35 mA/g, and 424 mAh/g at 140 mA/g. The capacity retention of 90% after 250 cycles show that tested electrode material is suitable as a negative electrode for lithium-ion batteries.

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Freestanding nano crystalline Tin@carbon anode electrodes for high capacity Li-ion batteries

Cited by 16 publications

References 29 publications

A New Technique for In Situ Determination of the Active Surface Area Changes of Li–Ion Battery Electrodes

A New Technique for In Situ Determination of the Active Surface Area Changes of Li–Ion Battery Electrodes

Lithium storage properties of Sn/C composite anode materials

Nano Tin/Tin Oxide Attached onto Graphene Oxide Skeleton as a Fluorine Free Anode Material for Lithium-Ion Batteries

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