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Chemical Engineering Student Develop New Materials of Lithium Ion Batteries

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Submit by prasetyaFT on July 05, 2018 | Comment(s) : 0 | View : 777

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WhatsApp Image 2018-07-02 at 21.17.30
Three students of Chemical Engineering Faculty of Engineering Universitas Brawijaya (FT-UB) developed and examined the potential of magnetite transition metal (Fe3O4) as anode-forming material in lithium-ion batteries.

Lithium-ion batteries are one type of battery that is widely used in mobile phones, digital cameras, and notebooks. Even lately it is being developed for electric cars. In addition to having high power, this battery is light and can be used many times.

According to the research team, magnetite is potentially used as a lithium-ion battery electrode because it has a current storage capacity per heavy material weight (up to 924 mAh/g), environmentally friendly, easy to obtain, and relatively inexpensive price.

"Theoretically it is very effective. However, due to the large volume of dilation during the capture and release of Li+ ions, the cyclical stability, and storage capacity of Li+ ions of magnetite material is deteriorating," said the team leader, Anne Dian Pavita Zari (Chemical Engineering 2017).

In addition to Anne, this research involved Lusia Emiliana Wahyuningtyas (Chemical Engineering 2017) and Riski Agung Nata Utama (Chemical Engineering 2016) with Rama Oktavian, ST., M.Sc., as the supervising lecturer.

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WhatsApp Image 2018-07-02 at 21.57.04
Anne explained, the magnetite conductivity is not good enough to be used as the material of lithium ion battery electrode. To get around this, the team took the initiative to composite magnetite with carbon to produce hybrid materials that have high current storage capacity and conductivity.

One easily obtainable carbon source is Carbon Conductive Glue. Carbon Conductive Glue in this study serves as an adhesive as well as a carbon source.

"Fe3O4/C composites developed and designed to have an advantage over commercially used anode materials graphite," says Anne.

The graphite capacity is theoretically only 372 mAh/g that can’t meet increasing demand for high-performance Lithium-ion batteries. However, graphite is a good conductive material so it is still widely applied as a lithium-ion battery electrode.

Therefore, even if magnetite performs well in terms of its reversible capacity, the tendency for aggregation can cause a decrease in capacity during the charging or discharging cycle.

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WhatsApp Image 2018-07-02 at 21.19.06
Carbon is introduced to suppress the aggregation process of nanoparticles. The Fe3O4/C nanocomposite as an anode material for lithium-ion batteries is expected to have good and efficient electrochemical performance.

"We have done our best to prepare our PKM project, especially preparation for PIMNAS this year," she explained.

Hopefully, the research can be a data bank for the development of Lithium-ion batteries especially in the technical data and can provide solutions in the manufacture of Lithium-ion batteries so it will have greater electrical current storage capacity.

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