Preparation and characterization of flake graphite/silicon/carbon spherical composite as anode materials for lithium-ion batteries

Lai, Jun; Guo, Huajun; Wang, Zhixing; Li, Xinhai; Zhang, Xiaoping; Wu, Feixiang; Peng, Yue

doi:10.1016/j.jallcom.2012.03.096

Cited by 101 publications

(43 citation statements)

References 29 publications

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“…This study showed how the use of different carbons and binders can greatly influence the performance of the Si anodes. In a similar approach, a flake graphite/Si/C composite anode was prepared [224]. The initial capacity was shown to be ~850 mAh·g -1 , which decreased to 552 mAh·g -1 after the 20th cycle.…”

Section: Si Nanopowder Anode Materialsmentioning

confidence: 99%

Metal-assisted chemical etching of silicon and the behavior of nanoscale silicon materials as Li-ion battery anodes

2015

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This review outlines the developments and recent progress in metal-assisted chemical etching of silicon, summarizing a variety of fundamental and innovative processes and etching methods that form a wide range of nanoscale silicon structures. The use of silicon as an anode for Li-ion batteries is also reviewed, where factors such as film thickness, doping, alloying, and their response to reversible lithiation processes are summarized and discussed with respect to battery cell performance. Recent advances in improving the performance of silicon-based anodes in Li-ion batteries are also discussed. The use of a variety of nanostructured silicon structures formed by many different methods as Li-ion battery anodes is outlined, focusing in particular on the influence of mass loading, core-shell structure, conductive additives, and other parameters. The influence of porosity, dopant type, and doping level on the electrochemical response and cell performance of the silicon anodes are detailed based on recent findings. Perspectives on the future of silicon and related materials, and their compositional and structural modifications for energy storage via several electrochemical mechanisms, are also provided.

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Section: Si Nanopowder Anode Materialsmentioning

confidence: 99%

Metal-assisted chemical etching of silicon and the behavior of nanoscale silicon materials as Li-ion battery anodes

2015

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“…electrolyte interface (SEI) between the Si surface and the organic electrolyte leads to a low Coulombic efficiency and a decrease in capacity during cycling [8-10, 12, 21]. C-based Si composite materials have attracted attention as promising anode materials with stable and excellent Li + storage properties because of their high electrical conductivity and the stress-buffer layer of carbonaceous materials [22][23][24][25][26][27][28][29][30][31][32][33][34][35][36]. C-based Si composite materials such as Si-graphite, Si-amorphous C, Si-C nanotubes, and Si-graphene have long cycle lives when the Si content in the composite materials is low [22][23][24][25][26][27][28][29][30][31][32][33][34][35].…”

Section: Introductionmentioning

confidence: 99%

Enhanced Li+ storage properties of few-layered MoS2-C composite microspheres embedded with Si nanopowder

Choi

2015

Nano Res.

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A few-layered MoS 2 -C composite material is studied as a supporting material for silicon nanopowder. Microspheres of the few-layered MoS 2 -C composite embedded with 30 wt.% Si nanopowder are prepared by one-pot spray pyrolysis. The Si nanopowder particles with high capacity are completely surrounded by the few-layered MoS 2 -C composite matrix. The discharge capacities of the MoS 2 -C composite microspheres with and without 30 wt.% Si nanopowder after 100 cycles are 1,020 and 718 mAh·g -1 at a current density of 1,000 mA·g -1 , respectively. The spherical morphology of the MoS 2 -C composite microspheres embedded with Si nanopowder is preserved even after 100 cycles because of their high structural stability during cycling. The MoS 2 -C composite layer prevents the formation of unstable solid-electrolyte interface (SEI) layers on the Si nanopowder. Furthermore, as the MoS 2 -C composite matrix exhibits high capacity and excellent cycling performance, these characteristics are also reflected in the MoS 2 -C composite microspheres embedded with 30 wt.% Si nanopowder.

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“…Despite the improvement in performance, owing to the elaborate designation of morphology, they are not satisfactory. Si anodes still suffer from high cost, difficulty in scaling up, poor cycling stability resulting from huge volume change (>300%) during the alloying-dealloying processes, and inefficient utilization due to the poor electrical conductivity [48]. Therefore, it is a major topic of interest to explore a cost-effective conductive material to buffer the volume change and improve the conductivity of Si anode.…”

Section: Graphene-si/sn Composites As Anodes For Libsmentioning

confidence: 99%

Graphene‐Based Electrodes for Lithium Ion Batteries

Wang

Liu

Sun

2015

Graphene‐based Energy Devices

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IntroductionAs a kind of carbon material, graphene sheet (GS) has attracted increasing attention in a variety of fields because of its high theoretical specific surface area (2600 m 2 g −1 ), good flexibility, superior chemical/thermal stability, and extraordinary electrical, thermal, and mechanical properties. The unique structure and outstanding properties render graphene highly promising for a wide range of applications in electronics, sensors, and energy storage/conversion.In the field of lithium ion batteries (LIBs), graphene has wide potential windows and rich surface chemistry, and thus can be used as electrode material individually. Also, the high conductivity and unique layered structure make graphene a predominant matrix to form hybrids with other cathode and anode materials. Significant synergistic effects often occur in graphene/other material composites, which will greatly enhance the overall electrochemical performance: On one hand, the conductivity of cathode or anode materials can be significantly increased after compositing with graphene, which will improve the electron transport and rate capability of the electrode; on the other, the good mechanical property of graphene can help maintain the microstructure of electrode materials and improve the cyclic stability. Besides, graphene has an extremely large aspect ratio and excellent structural flexibility; thus it can act as building blocks to self-assemble into two-dimensional (2D) flexible and free-standing electrode as well as three-dimensional (3D) macroscopic aerogels. This is of great importance to promote the development of new electrode structures and new types of LIBs.In this review, we will summarize recent research progress on the synthesis methods, structural design, and electrochemical performance of graphene-based electrodes for high-performance LIBs, including graphene-based cathode materials, graphene-based anode materials, 2D graphene-based flexible electrodes, and 3D macroscopic graphene-based electrodes.Graphene-based Energy Devices, First Edition. Edited by A. Rashid bin Mohd Yusoff.

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Preparation and characterization of flake graphite/silicon/carbon spherical composite as anode materials for lithium-ion batteries

Cited by 101 publications

References 29 publications

Metal-assisted chemical etching of silicon and the behavior of nanoscale silicon materials as Li-ion battery anodes

Metal-assisted chemical etching of silicon and the behavior of nanoscale silicon materials as Li-ion battery anodes

Enhanced Li+ storage properties of few-layered MoS2-C composite microspheres embedded with Si nanopowder

Graphene‐Based Electrodes for Lithium Ion Batteries

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