Chung-Ang University Researchers Pave the Way for Ultra-Fast Charging Lithium Batteries
The pressing challenge of lithium-ion battery technology lies in achieving swift charging without compromising energy density, a crucial factor in the widespread adoption of electric vehicles.
February 06, 2024. By Abha Rustagi
The pressing challenge of lithium-ion battery technology lies in achieving swift charging without compromising energy density, a crucial factor in the widespread adoption of electric vehicles.
The researchers, led by Associate Professor Janghyuk Moon, tackled this challenge head-on by delving into the effects of high-concentration electrolytes on battery interface kinetics and stability. “Our study aims to enhance the range and reduce charging times of electric vehicles by developing advanced battery technologies, specifically leveraging the commonly used LiPF6 and linear carbonates in commercial batteries. By improving the kinetics and stability of batteries under fast charging conditions, we hope to make a meaningful impact on the EV industry and ultimately on people's daily lives,” Dr. Moon said.
Their innovative strategy, outlined in the study, revolves around controlling polarization effects, which are notorious for causing issues like cell swelling due to lithium plating during fast charging. By experimenting with electrolytes like dimethyl carbonate, ethyl methyl carbonate, and diethyl carbonate, the team aimed to facilitate the rapid insertion of lithium ions into the graphite anode while mitigating the barriers to desolvation.
Laboratory tests revealed promising results, with pouch cells retaining three times more capacity over 200 cycles, indicating enhanced fast-charging capabilities and reduced risks associated with lithium plating-induced cell swelling. Moreover, the study employed molecular dynamics simulations to gain insights into the micro-environmental changes within the battery system, further refining their understanding of how electrolytes influence battery performance.
Dr. Moon envisions that these advancements will not only make electric vehicles more practical and appealing to consumers but also contribute significantly to reducing carbon emissions and combating climate change in the long term. “If this leads to increased convenience for people, it could further boost the widespread adoption of these vehicles. In the long term, such technological improvements could play a crucial role in reducing carbon emissions and mitigating climate change, profoundly impacting people's lives and the health of our planet,” he said.
In summary, the Chung-Ang University team's research marks a significant milestone in the quest for safer, faster-charging lithium batteries, heralding a new era of innovation in the electric vehicle industry.
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