Carbon-air batteries as the next generation of energy storage systems molybdenum disulfide additive new materials overview
One of the obstacles to wind and solar power is their intermittency. One promising alternative to adverse environmental conditions is hydrogen storage systems, which use hydrogen separated from the water to generate clean electricity. However, these systems are inefficient and often require a large scale to compensate. This in turn leads to complex thermal management and reduced energy and power density.
In a study published in the Journal of Energy, researchers at the Tokyo Institute of Technology propose an alternative electric energy storage system that uses carbon (C) instead of hydrogen as an energy source. The new system, called the Carbon/Air Secondary Cell (CASB), consists of solid oxide fuel and electrolysis cells (SOFC/ECs) that electrolyze carbon dioxide (CO2) to generate energy with air oxidation. SOFC/ECs can use compressed liquefied carbon dioxide as an energy storage system.
"Similar to batteries, cases use energy from renewable energy to charge and reduce carbon dioxide to C," explains Professor Manabu Ihara of Tokyo Institute of Technology. During the subsequent discharge phase, C is oxidized to produce energy." Because carbon is stored in soft /ECs confined Spaces, the energy density of CASB is limited by the amount of carbon it can hold. Despite this limitation, the researchers found that CASB has a higher volumetric energy density than hydrogen storage systems.
Another indicator of battery performance is charge and discharge efficiency. To assess this, the researchers conducted charge-discharge experiments. They observed that the conversion between C and CARBON dioxide was due to the "Boudouard reaction," which is characterized by a REDOX reaction mixture of carbon monoxide (CO), carbon dioxide and C. Specifically, during the charging phase, C is reduced by electrochemical deposition at the electrode to reduce carbon dioxide and reduce the company\'s decomposition by Boudouard. In the discharge stage, C is oxidized to CO and CO2 by the Boudouard gasification reaction and electrochemical oxidation, respectively. The researchers found that the use of carbon in CASB power generation depends on the balance between three different carbon species (C, CO2, CO), also known as the "Boudouard balance."
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