Caramel Popcorn Shaped Silicon Particle with Carbon Coating as a High Performance Anode Material for Li-Ion Batteries

He, Meinan; Sa, Qina; Liu, Gao; Wang, Yan

doi:10.1021/am4033668

Cited by 31 publications

(17 citation statements)

References 37 publications

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“…[5][6][7] Si itself is an attractive anode material because of its high theoretical capacity (3580 mAh g À1 ,L i 15 Si 4 )a nd moderate thermodynamic lithiation potential( < 0.5V vs. Li/Li + )a tr oom temperature. [8,9] However, the significant capacity fade caused by the large volumec hange (~300 %) during charge/discharge cyclinga nd the low volumetric capacity when the particles ize is reduced to an anometers cale hinderi ts commercial application as an anode material. [10][11][12] Silicon monoxide (SiO) is another promising anode materialc andidate.I nc ontrastt oS i, it has as lightly lower theoretical capacity of about 2600 mAh g À1 ,but relatively smaller volumee xpansion with longer cycle performance.…”

Section: Introductionmentioning

confidence: 99%

Scalable Preparation of Ternary Hierarchical Silicon Oxide–Nickel–Graphite Composites for Lithium‐Ion Batteries

Wang

Bao

et al. 2015

ChemSusChem

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Silicon monoxide is a promising anode candidate because of its high theoretical capacity and good cycle performance. To solve the problems associated with this material, including large volume changes during charge-discharge processes, we report a ternary hierarchical silicon oxide-nickel-graphite composite prepared by a facile two-step ball-milling method. The composite consists of nano-Si dispersed silicon oxides embedded in nano-Ni/graphite matrices (Si@SiOx /Ni/graphite). In the composite, crystalline nano-Si particles are generated by the mechanochemical reduction of SiO by ball milling with Ni. These nano-Si dispersed oxides have abundant electrochemical activity and can provide high Li-ion storage capacity. Furthermore, the milled nano-Ni/graphite matrices stick well to active materials and interconnect to form a crosslinked framework, which functions as an electrical highway and a mechanical backbone so that all silicon oxide particles become electrochemically active. Owing to these advanced structural and electrochemical characteristics, the composite enhances the utilization efficiency of SiO, accommodates its large volume expansion upon cycling, and has good ionic and electronic conductivity. The composite electrodes thus exhibit substantial improvements in electrochemical performance. This ternary hierarchical Si@SiOx /Ni/graphite composite is a promising candidate anode material for high-energy lithium-ion batteries. Additionally, the mechanochemical ball-milling method is low cost and easy to reproduce, indicating potential for the commercial production of the composite materials.

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Section: Introductionmentioning

confidence: 99%

Scalable Preparation of Ternary Hierarchical Silicon Oxide–Nickel–Graphite Composites for Lithium‐Ion Batteries

Wang

Bao

et al. 2015

ChemSusChem

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“…carbon and natural graphite et al ). However, the theoretical specific capacity is limited at 372 mA h g −1 for LiC 6 because of the intercalation mechanism, thus it cannot be able to meet the requirements of high power density and high specific capacity for plug-in hybrid and electric vehicles 6 7 8 .…”

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confidence: 99%

A novel Si/Sn composite with entangled ribbon structure as anode materials for lithium ion battery

Zhu

Zhang

et al. 2016

Sci Rep

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A novel Si/Sn composite anode material with unique ribbon structure was synthesized by Mechanical Milling (MM) and the structural transformation was studied in the present work. The microstructure characterization shows that Si/Sn composite with idealized entangled ribbon structured can be obtained by milling the mixture of the starting materials, Si and Sn for 20 h. According to the calculated results based on the XRD data, the as-milled 20 h sample has the smallest avergae crystalline size. It is supposed that the flexible ribbon structure allows for accommodation of intrinsic damage, which significantly improves the fracture toughness of the composite. The charge and discharge tests of the as-milled 20 h sample have been performed with reference to Li+/Li at a current density of 400 mA g−1 in the voltage from 1.5 to 0.03 V (vs Li/Li+) and the result shows that the initial capacity is ∼1400 mA h g−1, with a retention of ∼1100 mA h g−1 reversible capacity after 50 cycles, which is possible serving as the promising anode material for the lithium ion battery application.

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“…Carbon‐Coating for Core–Shell AMs (Carbon@AM) : Conductive carbon coating of electrode particles has been extensively studied recently to enhance the electron‐conduction and so the performance . Carbon@AM is probably the most effective way to control the ETN structures.…”

Section: Controlling Etn In Composite Electrodesmentioning

confidence: 99%

Strategies for Building Robust Traffic Networks in Advanced Energy Storage Devices: A Focus on Composite Electrodes

Wang

Min

et al. 2018

Advanced Materials

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portable electronics, cell phones, electrical vehicles (EVs), aerospace, etc. For advanced batteries, higher and higher energy density and/or power density, long cycling stability, good device safety, and low-cost are the primary goals. Since the energy density is mainly dependent on the specific capacity and loading level of active materials (AMs), AMs usually dominate the volume and weight inside the batteries. Because of this, tremendous efforts have been focused on high-performance AMs. However, the electrochemical performance of energy storage devices (ESDs) is fundamentally determined by a collective contribution or teamwork of all the components: AMs, electrolyte, separator, conductive agent, binders, etc. More importantly, with the increasing interests on high-capacity AMs (e.g., silicon, sulfur, Li-rich cathode, etc.), it becomes very clear that the "traffic system" (i.e., the charge transport system) plays very critical roles in the performance of the high-capacity AMs. Take silicon anode for example, a durable and flexible conductive network inside the electrode composite has been vital for addressing the big volume change issue. In this case, high-performance binders and conductive agent that can generate advanced conductive network are the keys. [2] In addition, with the increasing interests on EVs and flexible electronics, building a powerful and robust charge transport system inside ESDs is an urgent and critical task to support fast charging/ discharging capability and even flexibility of ESDs. In short, with the fast development of energy storage technologies, EVs, cell phones, etc., there is a critical, urgent, and challenging task on building powerful and durable charge transport system in next-generation advanced ESDs. Charge Transport Inside ESDsThe thriving of big cities highly relies on a powerful traffic system that transports the people, foods, products, etc. Similar to this picture, ESDs are powered by the transportation of charges, including both ions and electrons. As illustrated in Figure 1a, one can analogize the charge transport system and AMs in the electrodes of ESDs to the traffic system and buildings (i.e., host system of people), respectively. This analogy example not only help to explain the relationship between The charge transport system in an energy storage device (ESD) fundamentally controls the electrochemical performance and device safety. As the skeleton of the charge transport system, the "traffic" networks connecting the active materials are primary structural factors controlling the transport of ions/electrons. However, with the development of ESDs, it becomes very critical but challenging to build traffic networks with rational structures and mechanical robustness, which can support high energy density, fast charging and discharging capability, cycle stability, safety, and even device flexibility. This is especially true for ESDs with high-capacity active materials (e.g., sulfur and silicon), which show notable volume change during cycling. Therefore, there is an ur...

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Caramel Popcorn Shaped Silicon Particle with Carbon Coating as a High Performance Anode Material for Li-Ion Batteries

Cited by 31 publications

References 37 publications

Scalable Preparation of Ternary Hierarchical Silicon Oxide–Nickel–Graphite Composites for Lithium‐Ion Batteries

Scalable Preparation of Ternary Hierarchical Silicon Oxide–Nickel–Graphite Composites for Lithium‐Ion Batteries

A novel Si/Sn composite with entangled ribbon structure as anode materials for lithium ion battery

Strategies for Building Robust Traffic Networks in Advanced Energy Storage Devices: A Focus on Composite Electrodes

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