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Silicon/polypyrrole nanocomposite wrapped with graphene for lithium ion anodes

Published online by Cambridge University Press:  05 June 2017

Changling Li ,
Chueh Liu ,
Zafer Mutlu ,
Yiran Yan ,
Kazi Ahmed ,
Mihri Ozkan  and
Cengiz S. Ozkan
Changling Li*
Affiliation:
Materials Science and Engineering Program, University of California Riverside, CA92521
Chueh Liu
Affiliation:
Materials Science and Engineering Program, University of California Riverside, CA92521
Zafer Mutlu
Affiliation:
Materials Science and Engineering Program, University of California Riverside, CA92521
Yiran Yan
Affiliation:
Materials Science and Engineering Program, University of California Riverside, CA92521
Kazi Ahmed
Affiliation:
Department of Electrical and Computer Engineering, University of California, Riverside, CA92521
Mihri Ozkan
Affiliation:
Department of Electrical and Computer Engineering, University of California, Riverside, CA92521
Cengiz S. Ozkan
Affiliation:
Materials Science and Engineering Program, University of California Riverside, CA92521 Department of Mechanical Engineering, University of California Riverside, CA92521
*
*(Email: [email protected])

Abstract

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Herein, silicon nanoparticles (SiNPs) are coated with conducting hydrogel and wrapped with reduced graphene oxide (rGO) sheets via a facile and scalable solution-based sol-gel process. The in-situ polymerized polypyrrole (PPy) hydrogel forms an interconnected three-dimensional (3D) fiber matrix. Amine and hydroxyl groups from the hydrogel assist the encapsulation of the SiNPs through hydrogen bonding. The electro-conductive PPy fiber network and the wrapping of rGO offer efficient electron and ion transport pathways. The PPy/SiNPs/rGO electrodes can produce highly reversible capacities of 1312, 1285 and 1066 mAh g-1 at 100, 250 and 500 cycles at a current density of 2.1 A g-1, respectively.

Keywords

energy storageSipolymer
Type
Articles
Information
MRS Advances , Volume 2 , Issue 54: Energy Storage and Conversion , 2017 , pp. 3323 - 3327
Copyright
Copyright © Materials Research Society 2017 

References

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