January 16 (Reporter Zhou Zhoulin Xiaochun) American scientists published in the latest issue of "Scientific Progress" magazine said that the lithium ion concentration in lithium-ion batteries will change, which explains the life of lithium-ion batteries Short reasons and hopefully help develop batteries that charge faster and last longer.
A research team led by the US Department of Energy's Brookhaven National Laboratory recently discovered that when the battery generates electricity, if the electrode of the battery is made of nanoparticles, the concentration of lithium ions in some areas of the nanoparticle will rise first, then The decline, rather than the concentration that was previously thought to continue, will continue to increase.
A crystal lattice is a structure in which particles inside a crystal are arranged in a certain geometric pattern. Lithium-ion battery works by moving lithium ions between the positive and negative crystal lattices. When charging, lithium ions flow from the positive electrode to the negative electrode, and the opposite is true when discharging.
“Similar to the water absorption of sponges, we see that the total concentration of lithium ions in the nanoparticles is increasing,†said Wang Feng, a scientist at the Sustainable Energy Technology Department at Brookhaven National Laboratory who presided over the study. “But unlike water, lithium ions Will selectively flow out of certain areas, which causes inconsistent lithium ion concentrations between the crystal lattices."
The researchers pointed out that before the lithium ions enter the crystal lattice, the structure of the crystal lattice is very uniform. Once the lithium ions enter, the crystal lattice is stretched. When the lithium ions flow out, the crystal lattice shrinks again. Uneven motion of lithium ions can cause permanent damage because it deforms the structure of the active ingredients in the battery and can cause battery fatigue failure.
Researchers speculate that this phenomenon may also occur in other high-performance battery chemistries, and the results could help develop batteries with shorter charging times and longer standby times.
A research team led by the US Department of Energy's Brookhaven National Laboratory recently discovered that when the battery generates electricity, if the electrode of the battery is made of nanoparticles, the concentration of lithium ions in some areas of the nanoparticle will rise first, then The decline, rather than the concentration that was previously thought to continue, will continue to increase.
A crystal lattice is a structure in which particles inside a crystal are arranged in a certain geometric pattern. Lithium-ion battery works by moving lithium ions between the positive and negative crystal lattices. When charging, lithium ions flow from the positive electrode to the negative electrode, and the opposite is true when discharging.
“Similar to the water absorption of sponges, we see that the total concentration of lithium ions in the nanoparticles is increasing,†said Wang Feng, a scientist at the Sustainable Energy Technology Department at Brookhaven National Laboratory who presided over the study. “But unlike water, lithium ions Will selectively flow out of certain areas, which causes inconsistent lithium ion concentrations between the crystal lattices."
The researchers pointed out that before the lithium ions enter the crystal lattice, the structure of the crystal lattice is very uniform. Once the lithium ions enter, the crystal lattice is stretched. When the lithium ions flow out, the crystal lattice shrinks again. Uneven motion of lithium ions can cause permanent damage because it deforms the structure of the active ingredients in the battery and can cause battery fatigue failure.
Researchers speculate that this phenomenon may also occur in other high-performance battery chemistries, and the results could help develop batteries with shorter charging times and longer standby times.
Thermal Cutout,Capillary Type Thermostat,Freezer Used Thermostat,Adjustable Thermostat
Foshan City Jiulong Machine Co., Ltd , https://www.jlthermostat.com