For car owners who are hesitant to buy an electric car, the mileage of electric vehicles is their most concerned and anxious issue.
Electric vehicles that are being charged | Figureworm creative
To address the problem of range anxiety, clean energy researchers at the University of Technology Sydney (UTS) have designed a molecule to improve the performance of lithium-oxide batteries so that electric vehicles can drive the same range as fuel vehicles.
As a cutting-edge technology today, lithium-oxide batteries are designed to generate electricity by inhaling oxygen from the air to maximize energy density. So far, however, lithium-oxide batteries have been plagued by a variety of challenges, including insufficient discharge capacity, low energy efficiency, and severe parasitic reactions, and the researchers' newly designed integrated molecules can solve these problems simultaneously.
Professor Wang Guoxiu of the University of Technology Sydney, who led the team, said the exciting discovery solved several existing obstacles and created possibilities for the development of highly efficient, long-life, high-energy density lithium-oxide batteries.
Professor Wang Guoxiu of the University of Technology Sydney | UTS official website
"Batteries are undergoing fundamental changes," Professor Wang said, "and they will facilitate the transition to a climate-neutral society and open up new industrial opportunities for a country like Australia with abundant basic elements of battery production."
"They will also help utilities improve power quality and reliability, and help governments around the world become carbon neutral."
Professor Wang said his team's study detailed a new lithium-oxide battery that operates through a new quenching/mediating mechanism that relies on a direct chemical reaction between a multifunctional molecule called PDI-TEMPO and a superoxide radical/lithium peroxide. The battery's discharge capacity is increased by a factor of 46, the low charge overpotential is 0.7 volts, and it has an ultra-long cycle life of more than 1400 cycles.
Professor Wang said: "Our well-designed PDI-TEMPO molecules open up a new path for the development of high-performance lithium-oxide batteries. ”
The molecular PDI-TEMPO synthesized by developers can improve the performance of lithium-oxide batteries | References[1]
"The ability of the next generation of lithium-oxide batteries to increase the driving range of a single charge will be a major leap forward for the electric vehicle industry.
"We believe that the integrated molecules we designed can significantly improve the performance of lithium-oxide batteries and make the next generation of lithium-oxide batteries more practical."
bibliography
[1] Zhang J, Zhao Y, Sun B, et al. A long-life lithium-oxygen battery via a molecular quenching/mediating mechanism[J]. Science Advances, 2021, 8(3): eabm1899.
[2] https://www.eurekalert.org/news-releases/943049
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Research team
Corresponding author Guoxiu Wang/Guoxiu Wang: Director of the Clean Energy Centre at the University of Technology Sydney, PhD, University of Wollongong, Australia, 2001. The research areas are materials chemistry, electrochemistry, and battery technology, and the main research parties include lithium-ion batteries, lithium-oxide batteries, sodium-ion batteries, and hydrogen storage materials. So far, Professor Wang has published more than 600 journal papers, cited more than 47,000 times, and has an H factor of 114. He was elected a Fellow of the Royal Society of Chemistry in 2017, a Fellow of the European Academy of Sciences in 2020, and a highly cited scientist in the field of materials science worldwide from 2018 to 2021.
The homepage of the research group https://www.uts.edu.au/research-and-teaching/our-research/centre-clean-energy-technology
Thesis information
Published the journal Science Advances
Published January 21, 2022
论文标题A long-life lithium-oxygen battery via a molecular quenching/mediating mechanism
(DOI: 10.1126/sciadv.abm1899)
The areas of the article are materials chemistry, electrochemistry, energy chemistry