Influence of pyrolysis atmosphere on the lithium storage properties of carbon-rich polymer derived SiOC ceramic anodes
PBN-AR
Instytucja
Wydział Chemiczny (Politechnika Gdańska)
Informacje podstawowe
Główny język publikacji
ENG
Czasopismo
SOLID STATE IONICS
ISSN
0167-2738
EISSN
Wydawca
DOI
URL
Rok publikacji
2014
Numer zeszytu
Strony od-do
22-24
Numer tomu
262
Identyfikator DOI
Liczba arkuszy
Słowa kluczowe
ANODES
LI-ION BATTERIES
POLYMER DERIVED CERAMICS
SIOC
Streszczenia
Język
Treść
Polymer derived carbon-rich SiOC ceramics are prepared from polysiloxane precursors through a pyrolysis process at 1000 °C using pure argon and argon/hydrogen mixture as pyrolysis atmosphere. The precursor is synthesized from a linear (Si–H)-containing polysiloxane cross-linked with divinylbenzene using hydrosilylation reaction in the presence of a platinum catalyst. Pyrolysis in Ar/H2 mixtures, compared to the treatment under pure Ar, results into a decrease of the concentration of C dangling bonds as revealed by electron spin resonance (ESR) measurements. The amount of free carbon phase is 10 wt.% lower in the sample pyrolysed in a Ar/H2 mixture, while the ratio of hydrogen to free carbon remains constant for both, in Ar and in Ar/H2 pyrolysed samples. The sample prepared under Ar/H2 mixture shows an excellent cycling stability with an increase in the specific capacity of about 150 mAhg− 1 compared to its analogues pyrolysed in pure argon atmosphere
Inne
System-identifier
127143