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Silicon nanoparticles with a polymer-derived carbon shell for improved lithium-ion batteries: Investigation into volume expansion, gas evolution, and particle fracture

Schiele, A. 1; Breitung, B. ORCID iD icon 1,2; Mazilkin, A. 1,2; Schweidler, S. ORCID iD icon 1; Janek, J. 1; Gumbel, S.; Fleischmann, S.; Burakowska-Meise, E.; Sommer, H.; Brezesinski, T. ORCID iD icon 1
1 Center for Electrochemical Energy Storage Ulm & Karlsruhe (CELEST), Karlsruher Institut für Technologie (KIT)
2 Institut für Nanotechnologie (INT), Karlsruher Institut für Technologie (KIT)


Silicon (Si) and composites thereof, preferably with carbon (C), show favorable lithium (Li) storage properties at low potential, and thus hold promise for application as anode active materials in the energy storage area. However, the high theoretical specific capacity of Si afforded by the alloying reaction with Li involves many challenges. In this article, we report the preparation of small-size Si particles with a turbostratic carbon shell from a polymer precoated powder material. Galvanostatic charge/discharge experiments conducted on electrodes with practical loadings resulted in much improved capacity retention and kinetics for the Si/C composite particles compared to physical mixtures of pristine Si particles and carbon black, emphasizing the positive effect that the core−shell-type morphology has on the cycling performance. Using in situ differential electrochemical mass spectrometry, pressure, and acoustic emission measurements, we gain insights into the gassing behavior, the bulk volume expansion, and the mechanical degradation of the Si/C composite-containing electrodes. Taken together, our research data demonstrate that some of the problems of high-content Si anodes can be mitigated by carbon coating. ... mehr

Verlagsausgabe §
DOI: 10.5445/IR/1000089102
Veröffentlicht am 11.01.2019
DOI: 10.1021/acsomega.8b02541
Zitationen: 23
Web of Science
Zitationen: 25
Zitationen: 26
Cover der Publikation
Zugehörige Institution(en) am KIT Helmholtz-Institut Ulm (HIU)
Institut für Nanotechnologie (INT)
Karlsruhe Nano Micro Facility (KNMF)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2018
Sprache Englisch
Identifikator ISSN: 2470-1343
KITopen-ID: 1000089102
HGF-Programm 37.01.01 (POF III, LK 01) Fundamentals and Materials
Erschienen in ACS omega
Verlag American Chemical Society (ACS)
Band 3
Heft 12
Seiten 16706-16713
Vorab online veröffentlicht am 05.12.2018
Schlagwörter KNMF 2017-019-020610 APT FIB TEM; 2017-019-020610 TEM
Nachgewiesen in Web of Science
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