Lithium insertion into dense and porous carbon-rich polymer-derived SiOC ceramics

High Rate Capability of SiOC Ceramic Aerogels with Tailored Porosity as Anode Materials for Li-ion Batteries

“…Silicon oxycarbides are ceramic structures with silicon bonded to both oxygen and carbon simultaneously. The structure of SiOC beside the amorphous silicon oxycarbide network -in which Si atoms share bonds with O and C atoms simultaneously-contains an interconnected disordered free carbon phase which accounts for many of their excellent mechanical and electrochemical properties [27][28][29][30][31][32][33][34][35][36][37][38][39][40][41][42][43][44]. It came out from our previous studies on SiOC and SiCN ceramic materials [32,52] that free carbon content is an important factor determining reversible Li storage capacity and cycling stability.…”

Electrochemical Li Storage Properties of Carbon-Rich B–C–N Ceramics

“…Within recent years, anode materials based on carbon-rich SiOC and SiCN PDCs have been widely investigated for their lithium storage properties [13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28]. It has been reported that carbon-rich silicon carbonitride (SiCN) recovers capacities as high as 600 mAh¨g´1 [25] while storing lithium mostly in the carbon phase [23,28].…”

Influence of activated charcoal on the structural and morphological characteristics of ceramic based on silicon oxycarbide (SiOC): A promising approach to obtain a new electrochemical sensing platform

“…Normally, higher temperatures induce to the graphitization process, resulting in ordering and growth of this phase with conducting character [16,17]. Taking into account the features of the C free phase, many studies have been performed in order to prepare SiCO with different carbon contents, giving rise to C-rich and -poor ceramics focusing on its influence with respect to chemical durability [6], mechanical [18] and thermal properties [19], oxidation resistance [5], electrical conductivity [13], anodes for Li-ion batteries [20] and sensors [21]. Regarding to the application as electrode materials for Li-ion battery, the presence of the C free phase plays a significant role to amplify the performance of final ceramic, once it is considered as an active site in terms of lithium intercalation/deintercalation.…”