一項研究報告說，稻殼中的二氧化硅可以轉(zhuǎn)化成硅并且變?yōu)楦呷萘夸囯姵氐年枠O,，高容量鋰電池對于先進的便攜電子設(shè)備以及混合動力汽車的開發(fā)具有重要意義。Jang Wook Choi及其同事著手利用全世界每年在稻米生產(chǎn)中作為廢料產(chǎn)出的多于108噸的稻殼的巨大潛力,。稻殼是由獨特的二氧化硅層組成的，能保護內(nèi)部的谷粒不受蟲子和細菌的侵害,，但是在納米尺寸上能透氣透水,。這組作者使用了幾個步驟，包括酸和熱處理,，從而從稻殼的外層提取出了二氧化硅并把它轉(zhuǎn)化成了硅,。這個過程保存了這種二氧化硅層的原來的三維多孔納米結(jié)構(gòu)。這組作者使用提取出的二氧化硅作為鋰離子電池的陽極,，結(jié)果發(fā)現(xiàn)它們有優(yōu)秀的電化學(xué)性能,。這組作者提出，回收的稻殼可能作為一種在很大程度上尚未得到利用的大規(guī)模資源,，幫助滿足對鋰離子電池的硅的需求,。（生物谷 Bioon.com）
生物谷推薦的英文摘要
PNAS 10.1073/pnas.1305025110
Recycling rice husks for high-capacity lithium battery anodes
Dae Soo Jung, Myung-Hyun Ryou, Yong Joo Sung, Seung Bin Park, and Jang Wook Choi
The rice husk is the outer covering of a rice kernel and protects the inner ingredients from external attack by insects and bacteria. To perform this function while ventilating air and moisture, rice plants have developed unique nanoporous silica layers in their husks through years of natural evolution. Despite the massive amount of annual production near 108 tons worldwide, so far rice husks have been recycled only for low-value agricultural items. In an effort to recycle rice husks for high-value applications, we convert the silica to silicon and use it for high-capacity lithium battery anodes. Taking advantage of the interconnected nanoporous structure naturally existing in rice husks, the converted silicon exhibits excellent electrochemical performance as a lithium battery anode, suggesting that rice husks can be a massive resource for use in high-capacity lithium battery negative electrodes.
