Aluminum Rechargeable Battery Has A Cycle Life OF Up To 10,000 Times - Yongu Case

Aluminum Rechargeable Battery Has A Cycle Life OF Up To 10,000 Times

A team of researchers, led by Cornell dean and engineering professor Lynden Archer, announced that they have found a new, more cost-effective material for electrochemical cells that use aluminum or zinc as the anode. And it has been demonstrated that the new technology incorporating aluminum can produce rechargeable batteries that can provide up to 10,000 error-free cycles, solving the problem of dendrite growth in high-capacity aluminum alloy batteries. Click Here you can find a enclosure for protect your battery instrument.

There is a serious dendrite growth problem in previous high-capacity aluminum alloy batteries, which can lead to battery short-circuit, capacity fading, and other issues.

Zheng Jingxu and collaborators, by designing the geometry and surface chemistry of the substrate, and inducing uniform deposition of the aluminum metal anode, can avoid dendrite growth in aluminum alloy batteries under high current and high capacity cycling conditions.

At the same time, on the surface of the carbon fiber substrate, metal aluminum will form an "aluminum-oxygen-carbon" bond, thereby forming a highly uniform deposition layer, which finally enables the metal anode to have a high degree of reversibility of more than 99% and up to 3600h cyclic stability.

One of the advantages of aluminum is that it is abundant in the earth's crust, trivalent and lightweight, so it has a higher energy storage capacity than many other metals.

However, aluminum is difficult to integrate into the electrodes of batteries. Because it chemically reacts with the fiberglass separator, if a fiberglass separator is used to physically separate the anode and cathode, the cell will short out and fail due to the chemical reaction.

The researchers' solution was to engineer an interwoven carbon fiber substrate that forms stronger chemical bonds with aluminum. When the battery is charged, aluminum is deposited into the carbon structure by covalent bonding, i.e. electron pair sharing between the aluminum and carbon atoms.

While electrodes in conventional rechargeable batteries are only two-dimensional, this technology uses a three-dimensional (or non-planar) structure that allows for deeper, more consistent layers of aluminum that can be finely controlled.

Under practical conditions, aluminum anode batteries can be reversibly charged and discharged by one or more orders of magnitude more than other aluminum rechargeable batteries.

The method mainly utilizes chemical driving forces to promote the uniform deposition of aluminum into the voids of the 3D structure. Also, this new electrode has a higher thickness and reacts much faster than other electrodes.

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