Don’t put your electronic device in the oven, at least don’t need, however, to be able to get longer lasting battery life, one day you will take them when not in use the grill in the oven.
With the passage of time, rechargeable battery electrode will produce some minor branched filaments, the filament is called dendrites, they may cause battery, let the battery die and even the battery burning conditions. Lucky is that after passing through the new experiments and computer simulations, we have a way to solve this problem.
Wei Feng network, October 26, recently, researchers from California Polytechnic State University discusses how higher temperatures resolves these dendrites, and may extend the battery life, come and have a look.
First, we talk about working inside the battery case. When the battery current is produced when electrons flow from the anode through battery external circuit flows into the cathode. Anodes are usually made of conductive metals such as lithium, and within some of the atoms lose electrons (used to produce electricity) and then to ion, and move through the conductive liquid medium called electrolyte to the cathode. Vera Bradley iPhone cases
And to charge the battery is a process of flipping, ions return to the anode. But by the time they do, ion does not even attached to the anode. Instead, these ions form a micro-slope, after several charge cycles will eventually become a long branch.
When these dendrites and cathode contact can cause a short circuit. At this time, current will flow through dendrites rather than through an external circuit, the battery will lose its effect of “death”.
When current flows through the dendrites but also make the latter temperature increases, coupled with the electrolyte is usually a flammable substance, dendrites may appear because of the high temperature combustion conditions. In addition, dendrites not cause short circuits, they are detached from the anode, floating in the electrolyte. At this time, loss of anode material, battery cannot be stored with the same amount of power.
Results of this research have reached the United States cover of the journal of chemical physics. Scientists from the California Institute of technology’s Asghar Aryanfar said: “dendritic is very dangerous and will reduce the capacity of the rechargeable battery. “He said, although researchers are the most efficient lithium-ion battery, but the outcome is widely because dendrites problem is very common in rechargeable batteries.
Researchers grow dendritic testing the lithium-ion battery, heat to them for as long as a couple of days. They found that 55-degree high temperature can shorten the length of the dendritic 36%.
In order to understand what led to the contraction, researchers using computer simulations of the effects of heat on a lithium atom. Simulation results show that temperature makes the lithium atom has “Shuffle” movement in General, which makes enough overthrow of dendritic structures.
Asghar Aryanfar, by quantifying how much energy is required to change the dendritic structure, researchers can better understand its structure. Results of this study show that makes your battery recharge, you may only need some extra heat. Vera Bradley wholesale
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