Composite Materials Based on Polymer-Derived SiCN Ceramic and Disordered Hard Carbons as Anodes for Lithium-Ion Batteries
PBN-AR
Instytucja
Wydział Chemiczny (Politechnika Gdańska)
Informacje podstawowe
Główny język publikacji
ENG
Czasopismo
JOURNAL OF POWER SOURCES
ISSN
0378-7753
EISSN
Wydawca
DOI
URL
Rok publikacji
2013
Numer zeszytu
Strony od-do
80-86
Numer tomu
244
Identyfikator DOI
Liczba arkuszy
Słowa kluczowe
COMPOSITE ANODE MATERIALS
HARD CARBONS
LITHIUM-ION BATTERIES
SICN CERAMIC
Streszczenia
Język
Treść
New composite materials based on polymer-derived SiCN ceramics and hard carbons were studied in view of its application as anodes for lithium-ion batteries. Two kinds of composites were prepared by pyrolysis of the preceramic polysilazane (HTT1800, Clariant) at 1000 °C in Ar atmosphere mixed with hard carbons derived from potato starch (HC_PS) or with a hard carbon precursor, namely potato starch (PS), denoted as HTT/HC_PS and HTT/PS composites, respectively. Thermal gravimetric analysis suggests possible reactions between the preceramic polymer and the carbon precursor. The HTT/PS composites contain higher amount of oxygen and appear to be more homogeneous than that of the HTT/HC_PS composite. Raman analysis confirms the presence of highly disordered carbon in the composites by the appearance of the well-pronounced D band at 1347 cm−1. The materials are amorphous with a significant fraction of single graphene sheets as confirmed by X-ray diffraction. The HTT/PS composite exhibits a high-recovered capacity (434 mAh g−1 when charging with a current of 36 mA g−1) and outstanding cyclability for 400 cycles even at high current rates (90 mAh g−1 when charging with 3600 mA g−1). These properties make the composite a candidate anode material for high power energy devices.
Inne
System-identifier
127140