Long -term storage of solar and wind energy is important to integrate abundant and renewable energy sources in the US power grid. However, there is a lack of safe and reliable battery technologies to support permanent, clean energy push. Now, researchers reporting Central science A cost-effective and environmentally friendly aluminum-ion (al-ion) battery is designed that can fit the bill.
Lithium-ion (Li-ion) batteries are in many general consumer electronics, including electrical equipment and electric vehicles. These batteries are omnipresent due to their high energy density. But the cost is prohibitory for large battery systems required for energy storage on lithium utility-fame, and the Lee-Aye battery flaws greatly pose a significant security risk. Potential options for reliable long-term energy storage systems include rechargeable al-ion batteries. However, their most common electrolyte, liquid aluminum chloride, corods aluminum anode and is highly sensitive to moisture, which increases rust. Both factors contribute to poor stability and decline in electrical performance over time. So, Wei Wang, Shukiang Jiao and colleagues wanted to design a better al-ion battery without these limitations.
The team added an inert aluminum fluoride salt to an al-ion-containing electrolyte, converting it into a solid-state electrolyte. Aluminum fluoride salt has a 3D porous structure, allowing aluminum ions easily to hop in electrolyte and increase conductivity. Additionally, when researchers manufactured their al-ion battery, they used fluoroethylene carbonate as an interface additive to create a thin solid coating on the electrode to prevent the formation of aluminum crystals that degrade battery health. Did.
In experiments, physical and thermal stability was increased along with the moisture resistance of the battery, which allows it to suffer from a sharp object repeatedly and allows the temperature to bear the temperature as 392 degrees Fahrenheit as high as high. . The solid-state al-ion battery also had an extraordinary long life, which permanent 10,000 charge-discharge cycles, while losing less than 1% of its original capacity. In addition, most aluminum fluoride can be recovered with a simple wash and then recycled into another battery with slightly low performance. The new battery al-ion can reduce the production cost of the battery and expand their lives, thus increasing their practicality.
“This new al-ion battery design reflects the capacity for a long-lasting, cost-effective and high-protection energy storage system. The ability to recover major materials and recycle makes technology more durable, ”Wang says. Researchers stated that further improvement in energy density and life cycle needs further improvement before commercialization.
Writers accept funding from Chinese National Natural Science Foundation, Beijing Nova Program and Interdisciplinary Research Project for young teachers of Science and Technology Beijing University.
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