Aluminium-ion batteries are a class of rechargeable battery in which aluminium ions serve as charge carriers. Aluminium can exchange three electrons per ion. This means that insertion of one Al 3+ is equivalent to three Li + ions.
They have one of the highest energy densities of all batteries, but they are not widely used because of problems with high anode cost and byproduct removal when using traditional electrolytes. Aluminium-ion battery is a class of rechargeable battery in which aluminium ions provide energy.
This review classifies the types of reported Al-batteries into two main groups: aqueous (Al-ion, and Al-air) and non-aqueous (aluminum graphite dual-ion, Al-organic dual-ion, Al-ion, and Al-sulfur). Specific focus is given to Al electrolyte chemistry based on chloroaluminate melts, deep eutectic solvents, polymers, and “chlorine-free” formulations.
In particular, the rechargeable aluminum based battery is asustainable alternative to lithium ion batteries (LIB). The theoretical volumetric capacity of an aIuminum metal anode is four times higher than that of metallic Li. In addition, the costs are very attractive compared to LIB.
This includes a "high safety, high voltage, low cost" Al-ion battery introduced in 2015 that uses carbon paper as cathode, high purity Al foil as anode, and an ionic liquid as electrolyte. [ 20 ] Various research teams are experimenting with aluminium to produce better batteries.
Aqueous aluminum-ion (Al-ion) batteries are a recent addition to the more widely investigated aqueous metal-ion chemistries which function through the reversible intercalation of cations into host electrodes [, , , ].