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充電15分鐘 超級電池可用一周



智能手機和手提電腦功能強大,然而電池電量卻總是不夠用。美國一批科學家透過改變鋰電池的電極物料,將電池充電速度和儲電量大幅提升10倍,充滿電後一周內都毋須再充電。預計新款高效能鋰電池在5年內可推出巿場。

帶領研究團隊的美國西北大學化學及生物工程系教授哈羅德.孔(Harold Kung)表示,電池的充電速度和蓄電量,關乎電池中鋰離子的密度和活動速度。研究員集中改良電池的正極物料,將一般鋰電池採用的矽片改為微細矽粒,以增加電池包含的鋰離子數量,提升蓄電量,並採用石墨烯片,在其上鑽上數以百萬個20至40納米寬的小孔,幫助鋰離子快速移動,加速化學反應,以增加充電速度。

儲電量升10倍

新型鋰電池只需15分鐘便可充滿電,而且電量可供使用一周,若應用於耗電量大的電動車上有望令其行駛更為可靠。

不過新款電池充電約150次後,充電效能便會顯著下降,然而研究員指出,即使新電池只能充電150次,那已足夠使用1年或以上,整體效率仍比巿面上的鋰電池高5倍。

Categories: 圖片◆文摘
Accelerated Recharging: Scientists Discover How to Charge Laptops and Cellphones 10 Times Faster and 10 Times Larger


Scientists from Northwestern University in the U.S. have discovered how to charge laptops and cellphones 10 times faster and 10 times larger, as reported by BBC, November 15, 2011.

According to the report, Dr. Harold Kung’s team was able to do this by increasing the density and movement of lithium ions in the battery, using small holes (20 to 40 nm wide) for chemical oxidation.

They also used “tiny clusters of silicon so that there are more lithium ions for the battery to hold on to.”

The scientists said that the technology allows 15 minutes re-charging that could last for a week. The original speed would decline though after 150 times of recharging, but reportedly, it is still faster than the old method.

The accelerated battery recharging technology could only be available in shops within 5 years.

BBC said that the complete research paper has been published in the “Advanced Energy Materials” journal.
17 十一月 11 at 10:46
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