Novel silicon/carbon nano-branches synthesized by reacting silicon with methyl chloride: A high performing anode material in lithium ion battery

Wenfeng Ren; Yanhong Wang; Qiangqiang Tan; Ziyi Zhong; Fabing Su

doi:10.1016/j.jpowsour.2016.09.110

Novel silicon/carbon nano-branches synthesized by reacting silicon with methyl chloride: A high performing anode material in lithium ion battery

Wenfeng Ren, Yanhong Wang^*, Qiangqiang Tan, Ziyi Zhong, Fabing Su

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

28 Scopus citations

Abstract

To overcome the existing technical barriers of pulverization and fast capacity fading of Si/C composite anodes in lithium ion batteries and to low their production cost, we have developed a facile method for preparing Si/C nano-branches (Si/C NBs) by reacting commercial Si microparticles directly with CH₃Cl gas over Cu-based catalyst particles followed by a simple post treatment. The samples were characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, thermogravimetric analysis, and Raman spectroscopy. It was found that the diameter and the length of Si/C NBs were ∼70 nm and ∼6 μm, respectively. When used as the anode materials for lithium ion batteries, they displayed excellent electrochemical properties with an average specific capacity of 849 mA h g⁻¹ at a current density of 50 mA g⁻¹. The much improved electrochemical performance is attributed to the unique branched nanostructure and the coated carbon layer on the surface, which can effectively increase the electrical conductivity and buffer the volume change. This work provides a simple and low-cost route to prepare Si/C anode materials with novel branched nanostructure for lithium ion batteries.

Original language	English
Pages (from-to)	88-95
Number of pages	8
Journal	Journal of Power Sources
Volume	332
DOIs	https://doi.org/10.1016/j.jpowsour.2016.09.110
State	Published - 15 Nov 2016
Externally published	Yes

Keywords

Anode materials
Fixed bed
Lithium ion batteries
Silicon/carbon nano-branches

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.jpowsour.2016.09.110

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title = "Novel silicon/carbon nano-branches synthesized by reacting silicon with methyl chloride: A high performing anode material in lithium ion battery",

abstract = "To overcome the existing technical barriers of pulverization and fast capacity fading of Si/C composite anodes in lithium ion batteries and to low their production cost, we have developed a facile method for preparing Si/C nano-branches (Si/C NBs) by reacting commercial Si microparticles directly with CH3Cl gas over Cu-based catalyst particles followed by a simple post treatment. The samples were characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, thermogravimetric analysis, and Raman spectroscopy. It was found that the diameter and the length of Si/C NBs were ∼70 nm and ∼6 μm, respectively. When used as the anode materials for lithium ion batteries, they displayed excellent electrochemical properties with an average specific capacity of 849 mA h g−1 at a current density of 50 mA g−1. The much improved electrochemical performance is attributed to the unique branched nanostructure and the coated carbon layer on the surface, which can effectively increase the electrical conductivity and buffer the volume change. This work provides a simple and low-cost route to prepare Si/C anode materials with novel branched nanostructure for lithium ion batteries.",

keywords = "Anode materials, Fixed bed, Lithium ion batteries, Silicon/carbon nano-branches",

author = "Wenfeng Ren and Yanhong Wang and Qiangqiang Tan and Ziyi Zhong and Fabing Su",

note = "Publisher Copyright: {\textcopyright} 2016 Elsevier B.V.",

year = "2016",

month = nov,

day = "15",

doi = "10.1016/j.jpowsour.2016.09.110",

language = "英语",

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pages = "88--95",

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TY - JOUR

T1 - Novel silicon/carbon nano-branches synthesized by reacting silicon with methyl chloride

T2 - A high performing anode material in lithium ion battery

AU - Ren, Wenfeng

AU - Wang, Yanhong

AU - Tan, Qiangqiang

AU - Zhong, Ziyi

AU - Su, Fabing

PY - 2016/11/15

Y1 - 2016/11/15

N2 - To overcome the existing technical barriers of pulverization and fast capacity fading of Si/C composite anodes in lithium ion batteries and to low their production cost, we have developed a facile method for preparing Si/C nano-branches (Si/C NBs) by reacting commercial Si microparticles directly with CH3Cl gas over Cu-based catalyst particles followed by a simple post treatment. The samples were characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, thermogravimetric analysis, and Raman spectroscopy. It was found that the diameter and the length of Si/C NBs were ∼70 nm and ∼6 μm, respectively. When used as the anode materials for lithium ion batteries, they displayed excellent electrochemical properties with an average specific capacity of 849 mA h g−1 at a current density of 50 mA g−1. The much improved electrochemical performance is attributed to the unique branched nanostructure and the coated carbon layer on the surface, which can effectively increase the electrical conductivity and buffer the volume change. This work provides a simple and low-cost route to prepare Si/C anode materials with novel branched nanostructure for lithium ion batteries.

AB - To overcome the existing technical barriers of pulverization and fast capacity fading of Si/C composite anodes in lithium ion batteries and to low their production cost, we have developed a facile method for preparing Si/C nano-branches (Si/C NBs) by reacting commercial Si microparticles directly with CH3Cl gas over Cu-based catalyst particles followed by a simple post treatment. The samples were characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, thermogravimetric analysis, and Raman spectroscopy. It was found that the diameter and the length of Si/C NBs were ∼70 nm and ∼6 μm, respectively. When used as the anode materials for lithium ion batteries, they displayed excellent electrochemical properties with an average specific capacity of 849 mA h g−1 at a current density of 50 mA g−1. The much improved electrochemical performance is attributed to the unique branched nanostructure and the coated carbon layer on the surface, which can effectively increase the electrical conductivity and buffer the volume change. This work provides a simple and low-cost route to prepare Si/C anode materials with novel branched nanostructure for lithium ion batteries.

KW - Anode materials

KW - Fixed bed

KW - Lithium ion batteries

KW - Silicon/carbon nano-branches

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DO - 10.1016/j.jpowsour.2016.09.110

M3 - 文章

AN - SCOPUS:84988825924

SN - 0378-7753

VL - 332

SP - 88

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JO - Journal of Power Sources

JF - Journal of Power Sources

ER -

Novel silicon/carbon nano-branches synthesized by reacting silicon with methyl chloride: A high performing anode material in lithium ion battery

Abstract

Keywords

UN SDGs

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