USABLE ENERGY

 Carbon capture, utilization,
and sequestration technologies have been extensively studied to utilize carbon
dioxide (CO₂), a greenhouse gas, as a resource. So far, however,
effective technologies have not been proposed owing to the low efficiency
conversion rate and high energy requirements. Here, we present a hybrid Na-CO₂ cell
that can continuously produce electrical energy and hydrogen through efficient
CO₂ conversion with stable operation for over 1,000 hr
from spontaneous CO₂ dissolution in aqueous solution. In
addition, this system has the advantage of not regenerating CO₂ during
charging process, unlike aprotic metal-CO₂ cells. This system
could serve as a novel CO₂ utilization technology and
high-value-added electrical energy and hydrogen production device. 

 Notably, much of human carbon dioxide emissions are absorbed by
the ocean and turned into acidity. The researchers focused on this phenomenon
and came up with the idea of melting carbon dioxide into water to induce an
electrochemical reaction. According to the scientists, if acidity increases,
the number of electrons. If a battery system is created based on this
phenomenon, electricity can be produced by removing CO2.