Today, the impact of the greenhouse effect on us has become more serious, resulting in global climate change has a huge impact on the world. It would be double benefit to be able to recycle the excess carbon dioxide gas from the atmosphere and use it as a medium for fuel to continue to be used by humans.
Recently, scientists from the Massachusetts Institute of MIT (MIT) have proposed a battery model based on lithium batteries that could turn this idea into a reality! 2CO 2is considered to be one of the main causes of global warming, how to efficiently and environmentally friendly recovery of fixed co To sustain sustainable development has become a global challenge. 2 Traditional carbon capture and sequestration (CCS) systems, while preventing carbon dioxide emissions from entering the atmosphere and increasing atmospheric heat, inevitably consume more energy and produce more co
(based on fossil fuel capacity). 2A 2014 study estimated that CCS uses up to 30% of the power plant's electricity generation, and eventually only the captured Co
stored in a solid form and not re-used, the energy and economic architecture is extremely unreasonable.
Recently, MIT's research team has proposed a breakthrough in the way that lithium-ion battery systems absorb carbon dioxide directly from the power plant and convert the waste steam into a battery electrolyte. 2C atoms in carbon dioxide are in the highest oxidizing state (+4 Valence) and are very inactive, so lithium-carbon dioxide (Li-co Battery operation is usually dependent on the precious metal catalysis.
MIT researchers have successfully converted electrochemical carbon dioxide using only carbon electrodes without a metal catalyst. 2The researchers added co in an organic electrolyte containing Li + 2Capture agent (such as alkyl amine), to obtain a redox active substance, can be in the Li-co 2Direct reduction of the carbon electrode without catalyst in the battery, the discharge reaction forms the solid phase Li 3CO is the main product and produces high discharge voltage and high discharge capacity (﹥1000MAH/GC). The researchers said that ' aqueous amines and non-aqueous electrolytes are not usually used together, but we have found that their combination brings an interesting phenomenon that increases the discharge voltage and continuously transforms carbon dioxide.
' 2At present, the battery system can only support 10 charge and discharge cycle, obviously has not reached the commercial application of indicators, there is some improvement in space, but based on the amine chemical adsorption of CO 2The capture and conversion process is significantly more competitive than traditional methods and is a CO 2Capture chemistry and non-hydro chemistry for the first time coupling, to achieve high selectivity for electrochemical co
Transformation opens up a whole new path. The researchers believe that future challenges will focus on developing systems with higher amine conversion rates to achieve continuous conversion and increase capacity at higher power levels.
