Marita Piglowska

Poznan University of Technology, Poland

Title: Carbon-silicon hybrid as anode material in energy sources

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Biography

Eng. Marita Piglowska (graduated in 2021), current master student of Composites and Nanomaterials at Poznan University of Technology. In her scientific carrier she published 9 articles in international reviewed journals. She took part in 2 international conferences (presented topics: flammability of lithium-ion cells (she won the prize for the best student oral presentation) and use fuel cells and batteries in automotive industry). In 2019 she became the winner of the 2nd place in Hydrogen Competition in Poland. In 2021 she won the Veolia contest for the best engineering thesis and took part in Summer School of Veolia.

Abstract

Graphite is a commonly used active material in the anode of a lithium-ion cell. Its biggest disadvantage is its limited specific capacity, which is 372 mAh g^-1. For this reason, more effective electrode materials have been sought for many years - incl. oxide with transition elements, carbon, silicon. In a lithium-ion cell, a capacity is sought, which is achieved by pure lithium, which cannot be used as an anode due to its danger and cost. Due to the great interest in green chemistry and an attempt to reduce waste from various industries, attempts are made to apply carbon materials. As it is not possible to achieve all valuable properties with the use of one material, composite and hybrid materials are used. Hybrid materials can be defined as combinations of two (or more) materials, of materials and space and composites are connected at the nanometer or molecular level. They are assembled in such a way as to have attributes that are not offered by any material separately. Using materials of natural origin increases the biodegradability of the cell, contributes to spreading the slogan of green chemistry, and also achieves high specific capacities after many charge-discharge cycles. Silicon, in general, presents high specific capacity, proper working potential, abundant availability, environmental friendliness. Unfortunately, there are some disadvantages such as huge volume change, unstable SEI, low conductivity, which could be fixed using natural carbon materials (biomass-derived) in hybrid systems, which is the main focus of this work.