A reliable reason for the shortened life of lithium batteries.

Scientists find a reliable reason for the shortened life of lithium batteries.
Scientists find a reliable reason for short battery life: rise and fall in lithium-ion star concentration.

According to a paper published by American scientists in the latest issue of the journal "Science Development", the concentration of lithium ions in lithium-ion batteries fluctuates greatly, which explains the reasons for the shorter lifespan of lithium-ion batteries and may have helped develop batteries that charge faster and last longer.

A research team led by Ph.D. from the U.S. Department of Energy's Brookhaven National Laboratory recently discovered that when a battery draws current, the concentration of lithium ions in nanoparticles rises and then falls if the battery's electrodes are made of nanoparticles, rather than continuing to add as previously thought. .

A lattice is a structure in which the particles in a crystal are arranged in geometrical order. Li-ion batteries work by moving lithium ions between positive and negative lattices. When charged, they flow from positive to negative and vice versa.

Scientists find a reliable reason for short battery life: rise and fall in lithium-ion star concentration

According to a paper published by American scientists in the latest issue of the journal "Science Development", the concentration of lithium ions in lithium-ion batteries fluctuates greatly, which explains the reasons for the shorter lifespan of lithium-ion batteries and may have helped develop batteries that charge faster and last longer.

A research team led by Ph.D. from the U.S. Department of Energy's Brookhaven National Laboratory recently discovered that when a battery draws current, the concentration of lithium ions in nanoparticles rises and then falls if the battery's electrodes are made of nanoparticles, rather than continuing to add as previously thought.

A lattice is a structure in which the particles in a crystal are arranged in geometrical order. Li-ion batteries work by moving lithium ions between positive and negative lattices. When charged, they flow from positive to negative and vice versa.

Low-temperature lithium iron phosphate battery 3.2V 20A
Low-temperature lithium iron phosphate battery 3.2V 20A
-20℃ charge, -40℃ 3C discharge capacity≥70%
Charging temperature: -20~45℃
-Discharge temperature: -40~+55℃
-40℃ support maximum discharge rate: 3C
-40℃ 3C discharge capacity retention rate≥70%

Similar to sponges, let's look at the lithium-ion concentration of nanoparticles that are always increasing, said Wang Feng, an energy technology scientist who presided over the research at Brookhaven National Laboratory, but with water, lithium ions can be selectively in some areas, Lithium-ion concentration is the inconsistency between the formed lattices.

The researchers point out that the structure of the lattice is very homogeneous until the lithium ions enter the lattice. Once the lithium ions get in, they stretch the lattice. When the lithium ions flow out, the lattice contracts again. The uneven movement of lithium ions can cause deformation of the active component structure in the battery, which can lead to lasting damage to the battery and possibly lead to fatigue failure of the battery.

The researchers speculate that this phenomenon could also occur in other high-performance battery chemistries, a finding that could help develop batteries with shorter charging times and longer standby times.