Publications Repository - Gdańsk University of Technology

Metal- based materials capable of lithium (Li) alloy formation are key to realization of the next generation of high-energy density anodes for Li-ion batteries, owing to their high storage capacity. Designing a good sup- porting matrix is essential for homogeneously nesting these metallic nanodomains, to effectively utilize their high capacity while tackling the volume expansion issues. Silicon oxycarbides (SiOC), obtained via a polymer derived approach, have recently gained interest as efficient host matrices. However, the high price and limited availability of the precursors for these ceramics present a challenge for their use at a commercial level. Sn nanoparticles, measuring less than 100 nm in size, are formed in-situ within the amorphous SiOC matrix using an economical single-source precursor. The polymeric precursor was indigenously developed from a novel, low cost vinyl functionalized polysiloxane and tin dioleate as the Sn source. Tin dioleate at different wt%, viz. 33–56 %, was uniformly crosslinked with the Q-T polysiloxane and was pyrolysed at 1000 ◦C in an argon atmosphere to obtain the SiOC/Sn nanocomposites. The electrochemical characterization of SiOC/Sn ceramic nanocomposite anodes exhibit outstanding specific capacities of 650 and 750 mAh g 1 at 372 and 18.6 mA g 1, respectively after 400 charge/discharge cycles.

Authors

• Gurdial Blugan,
• Natalia Kovalska,
• Dominik Knozowski link open in new tab ,
• Pradeep V.W. Sasikumar,
• Wim J. Malfait,
• Silvia Paz,
• Piotr Madajski,
• Mateusz Leśniewski link open in new tab ,
• dr hab. inż. Mirosław Sawczak,
• dr Balanand Santhosh link open in new tab ,
• dr hab. inż. Monika Wilamowska-Zawłocka link open in new tab ,
• Matthias M. Koebel