From the School of Chemical Engineering at UNSW is the Centre for Advanced Solid and Liquid based Electronics and Optics (CASLEO). The team have shown that they can turn CO2 into solid carbon at room temperature and pressure using a proprietary liquid metal formula.
Liquid metals are alloys with very low melting points which form an eutectic liquid at room temperature. This is a low temperature and low pressure reaction therefore CO2 conversion requires low energy hence low cost. Carbon flake output is saleable on commodity markets.