The world's first fully rechargeable lithium-carbon dioxide battery prototype was born

Lithium-carbon dioxide batteries are an attractive energy storage system because their energy density is more than seven times that of ordinary lithium-ion batteries. However, until now, scientists have not been able to develop fully rechargeable prototypes, even though they have more energy storage potential.

Researchers at the University of Illinois (UIC) Chicago first showed that lithium-carbon dioxide batteries can be operated in a fully charged manner, and they have successfully tested a lithium-carbon dioxide battery prototype, which can complete 500 consecutive charge and discharge.

Their findings were published in the "Advanced Materials" magazine.

Amin Salehi-Khojin, associate professor of mechanical and industrial engineering at UIC University, said: "Lithium-carbon dioxide batteries have been attractive for a long time, but in fact, we have not been able to obtain truly efficient battery prototypes so far."

Traditionally, lithium carbonate and carbon are produced when lithium-carbon dioxide batteries are discharged. Lithium carbonate will be recycled during the charging phase, but carbon will accumulate on the catalyst, eventually causing battery failure.

The first author of the paper, Alireza Ahmadiparidari, a graduate student of the UIC School of Engineering, said: "The accumulation of carbon not only affects the activity of the catalyst, but also prevents the diffusion of carbon dioxide, and it also triggers the decomposition of the electrolyte in the charged state.

Salehi-Khojin and his colleagues used new materials in their experimental carbon dioxide batteries to promote the complete recovery of lithium carbonate and carbon. They used molybdenum disulfide as the cathode catalyst and combined it with a mixed electrolyte to help incorporate carbon during the cycle.

Specifically, their material combinations produce multi-component composite substances, rather than individual substances, making recycling more efficient.

Salehi-Khojin said: "Our unique material combination helps to create a more efficient and longer cycle life lithium-carbon dioxide battery, which will enable it to be used in advanced energy storage systems."

(Original source: China New Energy Network Comprehensive)

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