A high-performance ternary Si composite anode material with crystal graphite core and amorphous carbon shell

Sui, Dong; Xie, Yuqing; Zhao, Weimin; Zhang, Hongtao; Zhou, Ying; Qin, Xinghu; Ma, Yanfeng; Yang, Yong; Chen, Yongsheng

doi:10.1016/j.jpowsour.2018.03.008

Cited by 55 publications

(23 citation statements)

References 32 publications

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“…The Si@G anode shows good and stable performance at fast rates, with capacity values of 890 and 860 mAh g −1 at 2C and 5C (5 A g −1 ), respectively. It is noteworthy that our anode outperforms the capacity values reported previously [ 32 , 33 , 34 , 35 ] (see the information included in Table 1 ). The high and stable values of specific capacity obtained at high rates might be attributed to an efficient distribution of the particles achieved with the addition of isopropyl alcohol (IPA) during the synthesis, as well as the use of few-layer graphene (FLG) as conductive additive, which led to an optimal electrode microstructure able to buffer the expansion and contraction experienced by Si particles during cycling, as reported in our previous study [ 30 ].…”

Section: Resultssupporting

confidence: 46%

A Study to Explore the Suitability of LiNi0.8Co0.15Al0.05O2/Silicon@Graphite Cells for High-Power Lithium-Ion Batteries

Cabello

Gucciardi

Liendo

et al. 2021

IJMS

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Silicon–graphite (Si@G) anodes are receiving increasing attention because the incorporation of Si enables lithium-ion batteries to reach higher energy density. However, Si suffers from structure rupture due to huge volume changes (ca. 300%). The main challenge for silicon-based anodes is improving their long-term cyclabilities and enabling their charge at fast rates. In this work, we investigate the performance of Si@G composite anode, containing 30 wt.% Si, coupled with a LiNi0.8Co0.15Al0.05O2 (NCA) cathode in a pouch cell configuration. To the best of our knowledge, this is the first report on an NCA/Si@G pouch cell cycled at the 5C rate that delivers specific capacity values of 87 mAh g−1. Several techniques such as X-ray diffraction (XRD), scanning electron microscopy (SEM), electrochemical impedance spectroscopy (EIS) and gas chromatography–mass spectrometry (GC–MS) are used to elucidate whether the electrodes and electrolyte suffer irreversible damage when a high C-rate cycling regime is applied, revealing that, in this case, electrode and electrolyte degradation is negligible.

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Section: Resultssupporting

confidence: 46%

A Study to Explore the Suitability of LiNi0.8Co0.15Al0.05O2/Silicon@Graphite Cells for High-Power Lithium-Ion Batteries

Cabello

Gucciardi

Liendo

et al. 2021

IJMS

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“…However, the direct use of commercial nano-silicon powder is extremely expensive and if the initial raw material is micron-sized silicon, the production cost will be greatly reduced. Sui et al 57 made an attempt in this regard. They reported a ternary core/ shell SiGC composite, wherein micron-sized Si powders were ball milled in alcohol to form nanosilicon, and then milled with graphite and sucrose (Figure 5C).…”

Section: Carbon Derived From Sugarmentioning

confidence: 99%

“…In 2016, Wang et al 15 reported a controllable and scalable method to prepare silicon@flake-graphite/amorphous carbon (Si@FG/C) composite. Their preparation method was similar to that of Sui et al, 57 mainly including dry/wet ball milling, spray drying, and carbonization (Figure 5D), but two carbonaceous materials, glucose and PVP, were used. The binding effect of glucose and PVP was not only responsible for the formation of the spherical structure, but also induced a strong AC layer, which not only fixed the Si particles but also absorbed the mechanical strain arising from the volume changes during cycling.…”

Section: Carbon Derived From Sugarmentioning

confidence: 99%

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The critical role of carbon in marrying silicon and graphite anodes for high‐energy lithium‐ion batteries

et al. 2019

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Increasing the energy density of conventional lithium-ion batteries (LIBs) is important for satisfying the demands of electric vehicles and advanced electronics.Silicon is considered as one of the most-promising anodes to replace the traditional graphite anode for the realization of high-energy LIBs due to its extremely high theoretical capacity, although its severe volume changes during lithiation/delithiation have led to a big challenge for practical application. In contrast, the co-utilization of Si and graphite has been well recognized as one of the preferred strategies for commercialization in the near future. In this review, we focus on different carbonaceous additives, such as carbon nanotubes, reduced graphene oxide, and pyrolyzed carbon derived from precursors such as pitch, sugars, heteroatom polymers, and so forth, which play an important role in constructing micrometersized hierarchical structures of silicon/graphite/carbon (Si/G/C) composites and tailoring the morphology and surface with good structural stability, good adhesion, high electrical conductivity, high tap density, and good interface chemistry to achieve high capacity and long cycling stability simultaneously. We first discuss the importance and challenge of the co-utilization of Si and graphite. Then, we carefully review and compare the improved effects of various types of carbonaceous materials and their associated structures on the electrochemical performance of Si/G/C composites. We also review the diverse synthesis techniques and treatment methods, which are also significant factors for optimizing Si/G/C composites. Finally, we provide a pertinent evaluation of these forms of carbon according to their suitability for commercialization. We also make far-ranging suggestions with regard to the selection of proper carbonaceous materials and the design of Si/G/C composites for further development. K E Y W O R D Scarbonaceous additives, graphite, high energy, lithium-ion batteries, silicon ---

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“…Nevertheless, the slow Faradaic reaction and huge volume variation during the charge/discharge process result in unsatisfactory power density and short cycling life. In order to tackle these disadvantages, nanostructure engineering and forming composite with highly conductive materials are possible solutions to these issues [127,128]. With this in mind, carbon modified nanostructured Si/Sn anodes have been developed and attractive electrochemical properties have been demonstrated [31,[129][130][131].…”

Section: Graphene/alloying-type Anode Materialsmentioning

confidence: 99%

A Comprehensive Review of Graphene-Based Anode Materials for Lithium-ion Capacitors

Sui

et al. 2021

Chemistry

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Lithium-ion capacitors (LICs) are considered to be one of the most promising energy storage devices which have the potential of integrating high energy of lithium-ion batteries and high power and long cycling life of supercapacitors into one system. However, the current LICs could only provide high power density at the cost of low energy density due to the sluggish Li+ diffusion and/or low electrical conductivity of the anode materials. Moreover, the serious capacity and kinetics imbalances between anode and cathode result in not only inferior rate performance but also unsatisfactory cycling stability. Therefore, designing high-power and structure stable anode materials is of great significance for practical LICs. Under this circumstance, graphene-based materials have been intensively explored as anodes in LICs due to their unique structure and outstanding electrochemical properties and attractive achievements have been made. In this review, the recent progresses of graphene-based anode materials for LICs are systematically summarized. Their synthesis procedure, structure and electrochemical performance are discussed with a special focus on the role of graphene. Finally, the outlook and remaining challenges are presented with some constructive guidelines for future research.

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A high-performance ternary Si composite anode material with crystal graphite core and amorphous carbon shell

Cited by 55 publications

References 32 publications

A Study to Explore the Suitability of LiNi0.8Co0.15Al0.05O2/Silicon@Graphite Cells for High-Power Lithium-Ion Batteries

A Study to Explore the Suitability of LiNi0.8Co0.15Al0.05O2/Silicon@Graphite Cells for High-Power Lithium-Ion Batteries

The critical role of carbon in marrying silicon and graphite anodes for high‐energy lithium‐ion batteries

A Comprehensive Review of Graphene-Based Anode Materials for Lithium-ion Capacitors

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