A analysis group led by Professor Dennis YC Leung from the Division of Mechanical Engineering on the College of Hong Kong (HKU) has made a serious breakthrough in battery know-how with the event of a high-performance quasi-solid-state magnesium-ion (Mg-ion) battery . This modern design gives a sustainable, secure, excessive vitality density various to traditional lithium-ion batteries, addressing the constraints of fabric shortage and security issues.
Lately featured in Scientific progress Titled “Subsequent Technology Magnesium-Ion Batteries: The Quasi-Stable-State Method to Multivalent Steel Ion Storage,” the brand new Mg-ion battery has the potential to revolutionize the business. “It’s a groundbreaking improvement,” says Professor Leung.
In recent times, Mg-ion batteries have emerged as a possible resolution in gentle of the constraints of lithium-ion batteries. Nevertheless, the trail to growing environment friendly Mg-ion batteries is fraught with challenges, together with the necessity to overcome the slim electrochemical window in aqueous or water-based programs, and the poor ionic conductivity in non-aqueous programs.
To deal with these obstacles, Professor Leung’s group developed a water-in-salt Mg-ion battery with an working voltage of greater than 2 V. But it nonetheless lags behind non-aqueous counterparts as a result of dominance of protons over Mg ion storage within the cathode. .
“Hydrogen ions, or protons, are smaller and lighter in comparison with the steel ions. Because of their dimension, protons can simply enter the cathode construction of the battery. Nevertheless, this creates an issue as a result of protons and Mg ions compete for area, which severely limits the quantity of vitality the battery can retailer and the way lengthy it lasts,” says Sarah Leong, a PhD pupil in Professor Leung’s group and the primary creator of the analysis.
Nevertheless, the group’s tireless efforts finally paid off with the introduction of the quasi-solid-state magnesium-ion battery (QSMB), an modern battery design that makes use of a polymer-reinforced electrolyte to eradicate competitors between protons and steel ions. management. .
QSMB options a powerful voltage plateau at 2.4 V and an vitality density of 264 W·h kg¹, which exceeds the efficiency of present Mg-ion batteries and nearly matches the efficiency of Li-ion batteries.
Professor Leung highlighted: “Our quasi-solid-state magnesium-ion battery combines one of the best of each worlds, providing the excessive voltage of non-aqueous programs and the protection and cost-effectiveness of aqueous programs. It represents a serious step ahead within the improvement of high-performance magnesium-ion batteries.”
To place the QSMB to the final word check, the analysis group carried out in depth biking checks, with astonishing outcomes. Even beneath excessive situations with temperatures beneath freezing (-22°C), the QSMB retained a powerful 90% of its capability after 900 cycles. The battery can be non-flammable and might face up to pressures of greater than 40 atmospheric stress. This stage of sturdiness and efficiency makes the QSMB a promising candidate for shopper electronics, even in colder climates.
Dr. Wending Pan, analysis assistant professor on Professor Leung’s group, believes QSMB know-how has the potential to reshape the vitality storage panorama and sustainably energy our world.
He stated: “The superior electrolyte improvement technique offered in our examine has potential past magnesium-ion batteries and extends to different multivalent metal-ion batteries, resembling zinc-ion and aluminum-ion batteries. We consider this examine will pave the best way for the following era of vitality storage options that aren’t solely environment friendly but in addition environmentally pleasant.”
Authentic article: The HKU Engineering group unveils an modern battery design that guarantees excessive vitality density and sturdiness
Extra of: College of Hong Kong