Controlled swelling behavior and stable cycling of silicon/graphite granular composite for high energy density in lithium ion batteries

Lee, Dongsoo; Kondô, Akira; Lee, Seung-Woo; Myeong, Seungcheol; Sun, Seho; Hwang, Insung; Song, Taeseup; Naito, Makio; Paik, Ungyu

doi:10.1016/j.jpowsour.2020.228021

Cited by 46 publications

(33 citation statements)

References 36 publications

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“…It is reported that the structure distortion of electrodes accelerates a fading capacity. Moreover, the electrode swelling could raise safety issues caused by separator deformation or battery package breakage [23,24]. The enhanced structure resilience of electrodes with a controlled utilization degree can address the concerns with regard to capacity fading and safety problem.…”

Section: Resultsmentioning

confidence: 99%

A Strategic Approach to Use Upcycled Si Nanomaterials for Stable Operation of Lithium-Ion Batteries

et al. 2021

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Silicon, as a promising next-generation anode material, has drawn special attention from industries due to its high theoretical capacity (around 3600 mAh g−1) in comparison with conventional electrodes, e.g., graphite. However, the fast capacity fading resulted by a large volume change hinders the pragmatic use of Si anodes for lithium ion batteries. In this work, we propose an efficient strategy to improve the cyclability of upcycled Si nanomaterials through a simple battery operation protocol. When the utilization degree of Si electrodes was decreased, the electrode deformation was significantly alleviated. This directly led to an excellent electrochemical performance over 100 cycles. In addition, the average charge (delithation) voltage was shifted to a lower voltage, when the utilization degree of electrodes was controlled. These results demonstrated that our strategic approach would be an effective way to enhance the electrochemical performance of Si anodes and improve the cost-effectiveness of scaling-up the decent nanostructured Si material.

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Section: Resultsmentioning

confidence: 99%

A Strategic Approach to Use Upcycled Si Nanomaterials for Stable Operation of Lithium-Ion Batteries

et al. 2021

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“…However, silicon experiences the large volume changes up to 300 % associated with lithium ion, which leads to poor electrochemical properties caused by loss of the electrical contact between active materials and other effects. To overcome this problem, a new structure of the anode was proposed (Lee et al, 2020). It is the silicon/graphite granular composite with uniform amorphous carbon coating layer.…”

Section: Development Of All-solid-state Li-ion Batteries and Traditional Li-ion Batteriesmentioning

confidence: 99%

Smart Powder Processing for Excellent Advanced Materials and Its Applications

Naito

Kozawa

Kondô

et al. 2023

KONA

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“…For instance, Lee et al. designed the amorphous carbon coated silicon/graphite granule (C@SGG) composite by spray drying and mechanical coating (Figure S6a) [79] . The graphite, Si NPs and sucrose are evenly dispersed in distilled water to form suspension.…”

Section: Types Of Silicon Carbon Compositesmentioning

confidence: 99%

Design Strategies of Si/C Composite Anode for Lithium‐Ion Batteries

You

Tan

Wei

et al. 2021

Chemistry A European J

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Silicon‐based materials that have higher theoretical specific capacity than other conventional anodes, such as carbon materials, Li2TiO3 materials and Sn‐based materials, become a hot topic in research of lithium‐ion battery (LIB). However, the low conductivity and large volume expansion of silicon‐based materials hinders the commercialization of silicon‐based materials. Until recent years, these issues are alleviated by the combination of carbon‐based materials. In this review, the preparation of Si/C materials by different synthetic methods in the past decade is reviewed along with their respective advantages and disadvantages. In addition, Si/C materials formed by silicon and different carbon‐based materials is summarized, where the influences of carbons on the electrochemical performance of silicon are emphasized. Lastly, future research direction in the material design and optimization of Si/C materials is proposed to fill the current gap in the development of efficient Si/C anode for LIBs.

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Controlled swelling behavior and stable cycling of silicon/graphite granular composite for high energy density in lithium ion batteries

Cited by 46 publications

References 36 publications

A Strategic Approach to Use Upcycled Si Nanomaterials for Stable Operation of Lithium-Ion Batteries

A Strategic Approach to Use Upcycled Si Nanomaterials for Stable Operation of Lithium-Ion Batteries

Smart Powder Processing for Excellent Advanced Materials and Its Applications

Design Strategies of Si/C Composite Anode for Lithium‐Ion Batteries

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