Carbon Encapsulated Silicon Nanoparticles as Anodes for Lithium Ion Batteries

Cavit Eyovge, Pelin Livan*, Burcu Miser, Sertaç Altınok, Mehmet Kadri Aydınol, Tayfur Öztürk

*Corresponding author for this work

Research output: Contribution to journalConference articleAcademicpeer-review

2 Citations (Scopus)

Abstract

An investigation is carried out on the encapsulation of silicon with carbon nanomaterial via gas phase synthesis. Two methods were used; a spark discharge synthesis and RF induction thermal plasma. In the former, the use of silicon and graphite electrodes resulted in the formation of encapsulated nanoparticles 3-5 up to 70 nm in size. The particles were typically agglomerates of sub particles, encapsulated with 3-5 graphitic layers. Synthesis with RF thermal plasma yielded carbonaceous powders comprising Si, SiC and graphite. The particles were on average 82 nm encapsulated with 7-10 nm thick graphitic layers. Discharge capacity of the electrode made with thermal plasma powder showed a rapid decay implying that the encapsulation did not provide the expected stability to silicon. Smaller particles size and sequential synthesis might be necessary to obtain improved performance, i.e. first synthesize Si nanoparticles without the formation of SiC and then encapsulating them with graphitic material.
Original languageEnglish
Pages (from-to)373-382
Number of pages10
JournalECS transactions
Volume77
Issue number11
DOIs
Publication statusPublished - 2017
Externally publishedYes
Event231st ECS Meeting 2017: A05: Lithium-Ion Batteries and Beyond - Hilton New Orleans Riverside, New Orleans, United States
Duration: 28 May 20171 Jun 2017
Conference number: 231
https://www.electrochem.org/231

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