充電幾秒鐘通話一星期 美大學研發超級電容電池

Scientists from the University of Central Florida (UCF) have created a supercapacitor battery prototype that works like new even after being recharged 30,000 times.

來自中佛羅里達大學（UCF）的科學家已經創造了一個超級電容電池的原型，即使充電3萬次後仍然能夠工作。

The research could yield high-capacity, ultra-fast-charging batteries that last over 20 times longer than a conventional lithium-ion cell.

這項研究可以得到高容量、秒充的電池，是傳統的鋰離子電池續航時間的20多倍。

"You could charge your mobile phone in a few seconds and you wouldn't need to charge it again for over a week," says UCF researcher Nitin Choudhary.

UCF的研究員尼廷·喬杜裏表示：“你只要爲你的手機充幾秒鐘的電，那麼在接下來的一個多星期之內就不需要再次充電了。”

Supercapacitors can be charged quickly because they store electricity on the surface of a material, rather than using chemical reactions. That requires "two-dimensional" material sheets that can hold lots of electrons.

超級電容可以快速充電，因爲它們將電存儲在材料的表面上，而不是使用化學反應。這需要可以保存大量電子的“二維”材料片。

However, much of the research, including that by Henrik Fisker and UCLA, uses graphene as the two-dimensional material.

然而，很多研究，包括亨利克·菲克斯和UCLA的研究，都是使用石墨烯作爲二維材料。

Yeonwoong Eric Jung from UCF says it's a challenge to integrate graphene with other materials used in supercapacitors, though.

來自UCF的Yeonwoong Eric Jung說，將石墨烯與超級電容器中使用的其他材料集成是一個挑戰。

That's why his team wrapped 2D metal materials (TMDs) just a few atoms thick around highly-conductive 1D nanowires, letting electrons pass quickly from the core to the shell. That yielded a fast charging material with high energy and power density that's relatively simple to produce.

這就是爲什麼他的團隊在高度導電的1D納米線周圍包裹了幾個原子厚度的2D金屬材料（TMDs），使電子快速從核心傳遞到殼層。這產生了具有高能量和功率密度的快速充電材料，其製造相對簡單。

"We developed a simple chemical synthesis approach so we can very nicely integrate the existing materials with the two-dimensional materials," Jung says.

Jung說道：“我們開發了一種簡單的化學合成方法，因此我們可以很好地融合現有材料與二維材料。”

The research is in early days and not ready for commercialization, but it looks promising.

這項研究還處於早期階段，並沒有商業化的準備，但它看起來很有前途。

"For small electronic devices, our materials are surpassing the conventional ones worldwide in terms of energy density, power density and cyclic stability," Choudhary said.

“對於小型的電子設備，我們的材料在能量密度、功率密度和循環穩定性方面超越了世界範圍內的常規產品。”喬杜裏說道。