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Home Tech Automobiles

Electric vehicle batteries with new polymer coating could last long with more power

by Meghana Kandra
March 14, 2023 - Updated On March 15, 2023
in Automobiles, Cars, Electric Vehicles, News
Reading Time: 2 mins read
0
Electric Vehicle Batteries Could Get Big Boost With New Polymer Coating
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Lawrence Berkeley National Laboratory (Berkely Lab) develop a conductive polymer coating for electric vehicle batteries. These so-called, HOS-PFM could ensure that the batteries last longer, with power for electric vehicles. This coating ensures both electrons and ions are conducted at the same time.

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Electric Vehicle Batteries Could Get Big Boost With New Polymer Coating
Image credits- News Center

Gao Liu, a senior scientist in Berkeley Lab’s Energy Technologies Area said, “The advance opens up a new approach to developing EV batteries that are more affordable and easy to manufacture.” This ensures battery stability and high charge/discharge rates while enhancing battery life. The coating also shows promise as a battery adhesive that could extend the lifetime of a lithium-ion battery from an average of 10 years to about 15 years, Liu added.

To demonstrate HOS-PFM’s superior conductive and adhesive properties, Liu and his team coated aluminum and silicon electrodes with HOS-PFM and tested their performance in a lithium-ion battery setup. Silicon and aluminum are promising electrode materials for lithium-ion batteries because of their potentially high energy storage capacity and lightweight profiles. But these cheap and abundant materials quickly wear down after multiple charge/discharge cycles. During experiments at the Advanced Light Source and the Molecular Foundry, the researchers demonstrated that the HOS-PFM coating significantly prevents silicon- and aluminum-based electrodes from degrading during battery cycling while delivering high battery capacity over 300 cycles, a performance rate that’s on par with today’s state-of-the-art electrodes.

Cheaper batteries

The results are impressive, Liu said because silicon-based lithium-ion cells typically last for a limited number of charge/discharge cycles and calendar life. The researchers recently described these findings in the journal Nature Energy. Gao Liu, Berkely lab senior scientist in the Energy Technologies area said, “The advance opens up a new approach to developing EV batteries that are more affordable and easy to manufacture.”

The HOS-PFM coating could allow the use of electrodes containing as much as 80% silicon. Such high silicon content could increase the energy density of lithium-ion batteries by at least 30%, Liu said. And because silicon is cheaper than graphite, the standard material for electrodes today, cheaper batteries could significantly increase the availability of entry-level electric vehicles, he added. The team next plans to work with companies to scale up HOS-PFM for mass manufacturing. The Advanced Light Source and Molecular Foundry are DOE Office of Science user facilities at Berkeley Lab. The research was supported by DOE Vehicle Technologies Office. Additional funding was provided by the Toyota Research Institute. It is interesting how researchers are coming up with various technologies. The practicallity of them comes out as the technology goes out for mass production.

 

Tags: BatteryEV battereisGao LiuHOS-PFMLawrence Berkeley National Laboratory
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Meghana Kandra

Meghana studied PGD in Journalism, open university. She has more than five years of experience in content writing, from creative content development to online journalism. Electric vehicle enthusiast, engineer, and feminist.

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