14 Feb 2013

New Li-ion (lithium) Battery

 a team of scientists due to university of southern california and zhejiang university in china have developed a brand new lithium-ion battery that uses silicon nanoparticles set up of the normal graphite anodes to supply superior performance.

researchers at usc have developed a brand new lithium-ion battery design that uses porous silicon nanoparticles set up of the normal graphite anodes to supply superior performance.

the new batteries — that could well be employed in something from cellphones out to hybrid cars — hold 3 times as a lot of energy as comparable graphite-based designs and recharge among 10 minutes. the planning, nowadays underneath a provisional patent, could well be commercially accessible among 2 out to 3 years.

“it’s an exciting research. it opens the door regarding the design of subsequent generation lithium-ion batteries, ” same chongwu zhou, professor along at the usc viterbi faculty of engineering, who led the team that developed the battery.

zhou worked with usc graduate students mingyuan ge, jipeng rong, xin fang and anyi zhang, too as yunhao lu of zhejiang university in china. their research was revealed in nano research in january.

researchers have long attempted make use of silicon, which is certainly cheap and possesses a high potential capability, in battery anodes. ( anodes are where current flows inside battery, whereas cathodes are where current flows out. )

the matter has actually been that previous silicon anode designs, that were basically small plates of one's material, broke down from repeated swelling and shrinking throughout charging/discharging cycles and quickly became useless.

last year, zhou’s team experimented with porous silicon nanowires which can be found under 100 nanometers in diameter and only a few microns long.

the small pores inside the nanowires allowed the silicon out to expand and contract while not breaking whereas simultaneously increasing the surface space, that in flip allows lithium ions out to diffuse in and out from the battery a lot of quickly, improving performance.

though the batteries functioned well, the nanowires are problematic to manufacture en masse. out to solve the matter, zhou’s team took commercially accessible nanoparticles — small silicon spheres — and etched them the exact pores like the nanowires. the particles gathering similarly which can be created in any quantity desired.

though the silicon nanoparticle batteries nowadays last for barely 200 recharge cycles ( compared out to an average of 500 for graphite-based designs ), the team’s older silicon nanowire-based design lasted for up out to 2, 000 cycles, that was reported in nano lett last april.

additional development of one's nanoparticle design ought to boost the battery’s lifespan, zhou same.

“the straightforward technique we use may generate real affects battery applications within the whole close to future, ” zhou same.

future research from the cluster can specialize in finding a brand new cathode material with the use of a high capability that could combine well in the porous silicon nanowires and/or porous silicon nanoparticles to form a very redesigned battery.

the tasks was funded by usc viterbi.

publication : jiepeng rong, et al., “coaxial si/anodic titanium oxide/si nanotube arrays for lithium-ion battery anodes, ” nano research, 2013 ; doi : 10. 1007/s12274-013-0294-x

supply : robert perkins, usc news

image : photos/mingyuan ge and chongwu zhou

Title Post: New Li-ion (lithium) Battery
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Author: Anak Ifu

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