Wang Shuai, Zhang Ling, Han Fei, Li Wen-Cui, Xu Yuan-Yuan, Qu Wen-Hui, Lu An-Hui
State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology , Dalian 116024, People's Republic of China.
ACS Appl Mater Interfaces. 2014 Jul 23;6(14):11101-9. doi: 10.1021/am5034796. Epub 2014 Jul 14.
The assembly of commercial silica colloids in the presence of 1,6-diaminohexane and their subsequent encapsulation by poly(benzoxazine) have been used to produce coral-like porous carbons. The pyrolysis of the polymer followed by the removal of the silica produces a carbon with a continuous skeleton that contains spherical medium-size pores as "reservoirs" with a structure similar to a bunch of grapes. The total volume and the diameter of the "reservoir" pores are tunable. The coral-like morphology and the pore structure of the carbons make them suitable for use as electrode materials for supercapacitors and lithium-ion batteries. As supercapacitor electrodes, they exhibit excellent long-term cycle stability (almost no capacitance fading after 20,000 cycles at a current density of 1 A g(-1)) and good rate capability with capacitance retention of 88% (from 0.1 A g(-1) to 5 A g(-1)). Meanwhile, as a matrix for the encapsulation of SnO2 nanoparticles for Li-ion storage, the electrodes also show a high specific capacity and good cycling stability, i.e., 900 mA h g(-1) after 50 charge-discharge cycles. The good electrochemical performance of such carbons shows that they are promising candidate electrode materials for electrochemical energy storage.
在1,6 - 己二胺存在下商业硅胶的组装以及随后用聚（苯并恶嗪）对其进行封装已被用于制备珊瑚状多孔碳。聚合物热解后去除二氧化硅会产生一种具有连续骨架的碳，该骨架包含球形中等尺寸的孔作为“储库”，其结构类似于一串葡萄。“储库”孔的总体积和直径是可调的。碳的珊瑚状形态和孔结构使其适合用作超级电容器和锂离子电池的电极材料。作为超级电容器电极，它们表现出优异的长期循环稳定性（在1 A g(-1) 的电流密度下20,000次循环后几乎没有电容衰减）以及良好的倍率性能，电容保持率为88%（从0.1 A g(-1) 到5 A g(-1)）。同时，作为用于锂离子存储的SnO2纳米颗粒封装的基质，电极还显示出高比容量和良好的循环稳定性，即在50次充放电循环后为900 mA h g(-1)。这种碳良好的电化学性能表明它们是电化学能量存储中有前景的候选电极材料。
