Mesoscale origin of the enhanced cycling-stability of the Si-conductive polymer anode for li-ion batteries

Meng Gu, Xing Cheng Xiao, Gao Liu, Suntharampillai Thevuthasan, Donald R. Baer, Ji Guang Zhang, Jun Liu, Nigel D. Browning, Chong Min Wang

Research output: Contribution to journalArticle

32 Citations (Scopus)

Abstract

Electrode used in lithium-ion battery is invariably a composite of multifunctional components. The performance of the electrode is controlled by the interactive function of all components at mesoscale. Fundamental understanding of mesoscale phenomenon sets the basis for innovative designing of new materials. Here we report the achievement and origin of a significant performance enhancementof electrode for lithium ion batteries based on Si nanoparticles wrapped with conductive polymer. This new material is in marked contrast with conventional material, which exhibit fast capacity fade. In-situTEM unveils that the enhanced cycling stability of the conductive polymer-Si composite is associated with mesoscale concordant function of Si nanoparticles and the conductive polymer. Reversible accommodation of the volume changes of Si by the conductive polymer allows good electrical contact between all the particles during the cycling process. In contrast, the failure of the conventional Si-electrode is probed to be the inadequate electrical contact.

Original languageEnglish
Article number03684
JournalScientific Reports
Volume3
DOIs
Publication statusPublished - 14 Jan 2014
Externally publishedYes

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Anodes
Polymers
Electrodes
Nanoparticles
Composite materials
Lithium-ion batteries

ASJC Scopus subject areas

  • General

Cite this

Gu, M., Xiao, X. C., Liu, G., Thevuthasan, S., Baer, D. R., Zhang, J. G., ... Wang, C. M. (2014). Mesoscale origin of the enhanced cycling-stability of the Si-conductive polymer anode for li-ion batteries. Scientific Reports, 3, [03684]. https://doi.org/10.1038/srep03684

Mesoscale origin of the enhanced cycling-stability of the Si-conductive polymer anode for li-ion batteries. / Gu, Meng; Xiao, Xing Cheng; Liu, Gao; Thevuthasan, Suntharampillai; Baer, Donald R.; Zhang, Ji Guang; Liu, Jun; Browning, Nigel D.; Wang, Chong Min.

In: Scientific Reports, Vol. 3, 03684, 14.01.2014.

Research output: Contribution to journalArticle

Gu, M, Xiao, XC, Liu, G, Thevuthasan, S, Baer, DR, Zhang, JG, Liu, J, Browning, ND & Wang, CM 2014, 'Mesoscale origin of the enhanced cycling-stability of the Si-conductive polymer anode for li-ion batteries', Scientific Reports, vol. 3, 03684. https://doi.org/10.1038/srep03684
Gu, Meng ; Xiao, Xing Cheng ; Liu, Gao ; Thevuthasan, Suntharampillai ; Baer, Donald R. ; Zhang, Ji Guang ; Liu, Jun ; Browning, Nigel D. ; Wang, Chong Min. / Mesoscale origin of the enhanced cycling-stability of the Si-conductive polymer anode for li-ion batteries. In: Scientific Reports. 2014 ; Vol. 3.
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