Scientists finally figured out an important mechanism for the aging of lithium-ion batteries.


Users of digital products have found that battery capacity will always be lost over time. Although the battery life was just good when I bought it, after two years of frequent charge and discharge, it is exactly the same. The good news is that scientists from the US Department of Energy have recently figured out one of the mechanisms that led to the “reduction” of batteries, and it is expected to come up with strategies to deal with them in the future. In a common lithium-ion rechargeable battery, lithium ions can travel through the electrolyte between the anode and the cathode, creating a current that powers the device. The so-called capacity can be simply understood as the volume of lithium ions that run back and forth in the battery (during charging and discharging).
When manganese ions (gray in the upper image) are stripped from the cathode (blue area) of the battery, they react with the electrolyte near the anode (golden area) of the battery and capture lithium ions (greenish yellow in the above image).
The US Department of Energy's study found that the materials that make up the battery electrodes often break down and break down, causing certain metal ions (here specifically referred to as manganese) to float freely and run to the opposite electrode, then trap lithium ions.
Over time, more and more lithium ions are not put into normal operation (locked), and the capacity of the battery is gradually reduced, eventually leading to the inability to continue to provide ideal battery life.
Daniel Abraham, co-author of the research paper, explains: “This has a strict correlation with the management of manganese on the electrodes and the amount of lithium ions trapped. But now we know the mechanism behind the scenes and will find ways in the future. To overcome it."

Pyrite as Fillers Used in Steelmaking and Core-Spun Yarn

Steel-making/casting core-clad wire (filling material)

Place of Origin: Henan Luoyang, China

Pyrite, Iron pyrites, pyrites lump, Ferro sulphur, Pyrites powder.

Product Description:

Detailed introduction: is used as the filling material of cored wires and resulfurization additive agent for steel-making and casting.  It is used for adding sulfur element in steel smelting to improve the cutting performance, inoculation effect, graphite shape and mechanical properties of gray pig iron.

Quality:

S: 48%min, FE: 42%min, SIO2: 3.0%max, PB: 0.1%max,

ZN: 0.1%max, AS: 0.1%max, . C: 0.3%max, CU: 0.2%max,

H20: 1.0%max, SIZE: 95%min

Granularity: (0-3)mm/(3-8)mm/(3-15)mm/(15-50)mm or other particle size.

Packing: 25KG/500KG/1000KG/BAG or 1000KG/BAG or other packaging.

Note: if there are special requirements, the product can be customized according to clients` requirements.

 

Iron Pyrite

Pyrite, Iron pyrites, pyrites lump, Ferro sulphur, Pyrites powder

LUANCHUAN COUNTY HENGKAI METALLURGICAL MATERIALS SALES CO.,LTD , https://www.pyritechina.com