Preparation of amorphous red phosphorus nanoparticles for high performance lithium-ion battery anode by liquid phase method at room temperature
Pan Xueping, Tang Tao, Xu Yefei*
Jiangsu Jinju Alloy Material Co.,Ltd.,Danyang 212300,Jiangsu,China
Abstract
Larger volume expansion leads to material crushing and poor rate performance of red phosphorus,severely limiting its electrochemical performance in energy storage applications. The preparation of nano-sized red phosphorus is considered to be an effective treatment method to solve these problems. However,chemical synthesis to achieve the preparation of nano-sized red phosphorus has always been a huge challenge. Amorphous red phosphorus nanoparticles were prepared by dissolving and recomposing white phosphorus in isopropyl amine at room temperature to form a brown-red solution,followed by treating the solution in deionized water. Due to the nanometerization of the particles,the prepared amorphous red phosphorus exhibits excellent long-cycle stability and rate performance. Specific capacity of 760.3 mAh·g-1 after 800 cycles under current density of 2 A·g-1,and specific capacity of 1 208.7 mAh·g-1 under 20 A·g-1,was attained.
Keyword:
fine chemical engineering; isopropylamine; nano-sized amorphous red phosphorus; rate performance
图1 微米级红磷和纳米级红磷体积变化及非晶纳米红磷制备过程 a.微米级红磷和纳米级红磷体积变化; b.非晶纳米红磷制备过程Figure 1 Volume changes of micro-sized and nano-sized red phosphorous and preparation process of nano-sized amorphous red phosphorus
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