분회초청강연

      나노에너지환경

  김한수 교수 한양대학교

     ■ Education

■  Professional Career

Two-Dimensional Si/SiOx Nanocomposite Anode Materials for Lithium Ion Battery

Si has gained much attention as a promising anode material for lithium ion batteries because of its high theoretical capacity of 3,580 mAh g-1. Intensive research efforts have been devoted to find a proper nanostructure and composition to exploit the full potential of Si as an anode material. Various Si nanostructures including nanoparticles, nanowires, and nanotubes have been proposed, because nanoengineered Si anodes can realize effective volume needed to facilitate Li+ diffusion and improvement in battery performance. Nonstoichiometric SiOx has gained much attention as a one of the feasible matrix to circumvent the limitations of Si based anode materials. However, the complexity and limited number of available synthetic routes for the preparation of SiOx based anode materials should be resolved. SiOx based materials also suffer from their high production cost, which is now limiting their commercial success, because production cost of Si anode should be comparable to that of graphite for successful penetration of Si anode in the battery market. The presentation will focus on our recent works on the development of two-dimensional Si-SiOx nanocomposite materials prepared by sol-gel reaction based scalable process as high capacity lithium storage materials for lithium ion battery..

  민병권 박사 한국과학기술연구원

     ■ Education

■  Professional Career

Toward highly efficient solution based CIGS thin film solar cells

Chalcopyrite thin-film PVs (e.g. CuIn_xGa_1-xSe₂, CIGS) will be an attractive candidate for solar electricity generation because they are durable enough and cost effective with high efficiency. To make the CIGS solar cells more cost effective solution processed CIGS thin film preparation has been suggested and developed. In spite of several successful demonstrations most solution based methods resulted in lower solar cell performance than vacuum based counterpart to date. In this presentation several strategies for realizing highly efficient and useful solution processed CIGS thin film solar cells will be introduced. They include multi-stage paste coating method, color generation method, doping method, and nanostructuring method that have been being developed in our laboratory.

  이재준 교수 동국대학교

     ■ Education

■  Professional Career

Development of Large Area Bifacial DSSCs

 with Transparency Above 30%

Transparent dye-sensitized solar cells (DSSCs) attract great interests for see-through type photovoltaic windows with various color schemes so that they can be applied to the indoor-type photoenery conversion/recycling system under very low light intensity condition as well as the conventional BIPV type applications. The current efforts are mostly focused on the diversification of dyes for various colors, the development of the highly transparent electrode materials for both photoanode and counter electrode, and the designing of the highly stable and transparent semi-liquid electrolytes.

All the recent progresses and achievements were designed to make the large area bifacial module size up to 100 cm² with the overall transmittance above 30% and efficiencies of at least 6, 5, 4 % for red, green, and blue colored cells, respectively.

The most recent technical achievements and applications for a commercialization will be shortly presented and discussed together.