Micro-sized porous silicon@PEDOT with high rate capacity and stability for Li-ion battery anode

[Display omitted] •Micro-sized porous Si@PEDOT composite anode was synthesized.•NaOH etching of AlSi powder is prefer to HCl to maintain the micro morphology.•Si@PEDOT exhibited a high rate capacity of 1168 mAh g−1 at 2000 mA g−1. To address the serious volume expansion and poor conductivity of sili...

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Published inMaterials letters Vol. 293; p. 129712
Main Authors Li, Shuangfu, Huang, Jinhua, Wang, Jue, Han, Kai
Format Journal Article
LanguageEnglish
Published Amsterdam Elsevier B.V 15.06.2021
Elsevier BV
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Abstract [Display omitted] •Micro-sized porous Si@PEDOT composite anode was synthesized.•NaOH etching of AlSi powder is prefer to HCl to maintain the micro morphology.•Si@PEDOT exhibited a high rate capacity of 1168 mAh g−1 at 2000 mA g−1. To address the serious volume expansion and poor conductivity of silicon anode in lithium ion batteries (LIBs), a strategy through coating conductive polymer on the surface of micro-Si via a facile wet chemical process is proposed. In this way, a porous micro-Si anode coated with poly (3, 4-ethylenedioxythiophene) (PEDOT) was synthesized. This material shows a capacity as high as 1168 mAh g−1 at high current rate of 2000 mA g−1 for anode of LIBs. The synergistic effect of porous structure and PEDOT protective layer could not only relieve the volume expansion, but also enhance the conductivity of Si. This study provides an attractive strategy to deal with volume expansion and low conductivity of Si, which could be very meaningful for the development of high energy density LIBs.
AbstractList To address the serious volume expansion and poor conductivity of silicon anode in lithium ion batteries (LIBs), a strategy through coating conductive polymer on the surface of micro-Si via a facile wet chemical process is proposed. In this way, a porous micro-Si anode coated with poly (3, 4-ethylenedioxythiophene) (PEDOT) was synthesized. This material shows a capacity as high as 1168 mAh g−1 at high current rate of 2000 mA g−1 for anode of LIBs. The synergistic effect of porous structure and PEDOT protective layer could not only relieve the volume expansion, but also enhance the conductivity of Si. This study provides an attractive strategy to deal with volume expansion and low conductivity of Si, which could be very meaningful for the development of high energy density LIBs.
[Display omitted] •Micro-sized porous Si@PEDOT composite anode was synthesized.•NaOH etching of AlSi powder is prefer to HCl to maintain the micro morphology.•Si@PEDOT exhibited a high rate capacity of 1168 mAh g−1 at 2000 mA g−1. To address the serious volume expansion and poor conductivity of silicon anode in lithium ion batteries (LIBs), a strategy through coating conductive polymer on the surface of micro-Si via a facile wet chemical process is proposed. In this way, a porous micro-Si anode coated with poly (3, 4-ethylenedioxythiophene) (PEDOT) was synthesized. This material shows a capacity as high as 1168 mAh g−1 at high current rate of 2000 mA g−1 for anode of LIBs. The synergistic effect of porous structure and PEDOT protective layer could not only relieve the volume expansion, but also enhance the conductivity of Si. This study provides an attractive strategy to deal with volume expansion and low conductivity of Si, which could be very meaningful for the development of high energy density LIBs.
ArticleNumber 129712
Author Huang, Jinhua
Li, Shuangfu
Wang, Jue
Han, Kai
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Si anode
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Snippet [Display omitted] •Micro-sized porous Si@PEDOT composite anode was synthesized.•NaOH etching of AlSi powder is prefer to HCl to maintain the micro...
To address the serious volume expansion and poor conductivity of silicon anode in lithium ion batteries (LIBs), a strategy through coating conductive polymer...
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StartPage 129712
SubjectTerms Anode effect
Anodic coatings
Anodic protection
Composite materials
Conducting polymers
Conductive polymer
Energy storage and conversion
Flux density
Lithium
Lithium-ion batteries
Low conductivity
Materials science
Porous material
Porous silicon
Protective structures
Rechargeable batteries
Si anode
Synergistic effect
Title Micro-sized porous silicon@PEDOT with high rate capacity and stability for Li-ion battery anode
URI https://dx.doi.org/10.1016/j.matlet.2021.129712
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