锂空气电池可能成为下一代新电池技术
文章来源:未知 文章作者:enread 发布时间:2016-05-06 08:30 字体: [ ]  进入论坛
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Rechargeable lithium air batteries are a next-generation technology: Theoretically they might be much lighter1 and offer better performance than current lithium ion batteries. However, currently they run out of steam after only a few charging cycles. Researchers at the Technical University of Munich (TUM) and the Forschungszentrum Jülich have now investigated the processes and discovered a possible culprit: highly reactive singlet oxygen, which is released when the batteries are charged. A trimming diet is in order: Cell phones still bulge2 from jacket pockets and laptop computers continue to overstrain shoulder muscles. To blame are primarily the batteries: The ubiquitous lithium ion batteries need heavy electrodes made of transition metal oxides.
 
Light-weight alternatives are thus sought after. "One of the most promising4 approaches is the lithium air battery in which the lithium cobalt oxide3 cathode is replaced by carbon particles," explains Johannes Wandt, doctoral candidate and member of Prof. Hubert Gasteiger's team in the Department of Technical Electrochemistry at TUM.
 
"The theoretical energy density5 of these new rechargeable batteries is significantly higher than that of traditional lithium ion batteries:" Unfortunately, the technology is not yet ready for everyday use because rechargeable lithium air batteries have only a very short lifetime: After only a few charging cycles the carbon electrode becomes corroded6 and the electrolytic fluid decomposes7. "The problem was that no one knew exactly why," remarks Wandt.


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1 lighter 5pPzPR     
n.打火机,点火器;驳船;v.用驳船运送;light的比较级
参考例句:
  • The portrait was touched up so as to make it lighter.这张画经过润色,色调明朗了一些。
  • The lighter works off the car battery.引燃器利用汽车蓄电池打火。
2 bulge Ns3ze     
n.突出,膨胀,激增;vt.突出,膨胀
参考例句:
  • The apple made a bulge in his pocket.苹果把他口袋塞得鼓了起来。
  • What's that awkward bulge in your pocket?你口袋里那块鼓鼓囊囊的东西是什么?
3 oxide K4dz8     
n.氧化物
参考例句:
  • Oxide is usually seen in our daily life.在我们的日常生活中氧化物很常见。
  • How can you get rid of this oxide coating?你们该怎样除去这些氧化皮?
4 promising BkQzsk     
adj.有希望的,有前途的
参考例句:
  • The results of the experiments are very promising.实验的结果充满了希望。
  • We're trying to bring along one or two promising young swimmers.我们正设法培养出一两名有前途的年轻游泳选手。
5 density rOdzZ     
n.密集,密度,浓度
参考例句:
  • The population density of that country is 685 per square mile.那个国家的人口密度为每平方英里685人。
  • The region has a very high population density.该地区的人口密度很高。
6 corroded 77e49c02c5fb1fe2e59b1a771002f409     
已被腐蚀的
参考例句:
  • Rust has corroded the steel rails. 锈侵蚀了钢轨。
  • Jealousy corroded his character. 嫉妒损伤了他的人格。
7 decomposes 104d7ddd5cfb119e99319744ced0efe9     
腐烂( decompose的第三人称单数 ); (使)分解; 分解(某物质、光线等)
参考例句:
  • The debris slowly decomposes into compost. 这些垃圾慢慢地分解成了堆肥。
  • Plastic is a substance that hardly decomposes in the nature. 塑料是一种在自然中极难降解的物质。
TAG标签: battery lithium ion
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