以二氧化锗和二水合醋酸锌为原料,采用水热法制备了锗酸锌纳米棒,并将其与氧化石墨烯复合,制备了石墨烯包覆的锗酸锌纳米棒三维复合材料.SEM等测试表明,锗酸锌纳米棒均匀地穿插在石墨烯片中,阻止了石墨烯片之间相互堆垛,而石墨烯片层之...以二氧化锗和二水合醋酸锌为原料,采用水热法制备了锗酸锌纳米棒,并将其与氧化石墨烯复合,制备了石墨烯包覆的锗酸锌纳米棒三维复合材料.SEM等测试表明,锗酸锌纳米棒均匀地穿插在石墨烯片中,阻止了石墨烯片之间相互堆垛,而石墨烯片层之间相互连接,形成三维的空间导电网络,提高了材料的电子导电性.电化学测试表明,石墨烯片作为稳定的框架,能够有效缓冲活性物质在脱嵌锂过程中产生的体积变化,在500 m A·g^(-1)电流密度下循环190次后,Zn_2GeO_4@RGO复合材料的嵌锂容量仍有1189.5 m Ah·g^(-1);在3.2 A·g^(-1)的大电流密度下,嵌锂容量达到449.5m Ah·g^(-1),表明该复合材料具有优异的长循环稳定性和良好的倍率性能.展开更多
Three open\|framework zinc germanophosphates have been synthesized from ethylene glycol systems of Zn(Ac)\-2·2H\-2O\|H\-3PO\-4\|\%R\%\|GeO\-2\|Py\|EG, where \%R\% stands for an amine and EG for ethylene glycol. I...Three open\|framework zinc germanophosphates have been synthesized from ethylene glycol systems of Zn(Ac)\-2·2H\-2O\|H\-3PO\-4\|\%R\%\|GeO\-2\|Py\|EG, where \%R\% stands for an amine and EG for ethylene glycol. It was found that by selecting proper amines as structure\|directing templates during crystallization open\|framework zinc germanophosphates were synthesized. The structures of the zinc germanophosphates were characterized by X\|ray diffraction(XRD), scanning electron microscopy(SEM), inductively coupled plasma(ICP) analysis, infrared spectroscopy(IR).展开更多
文摘以二氧化锗和二水合醋酸锌为原料,采用水热法制备了锗酸锌纳米棒,并将其与氧化石墨烯复合,制备了石墨烯包覆的锗酸锌纳米棒三维复合材料.SEM等测试表明,锗酸锌纳米棒均匀地穿插在石墨烯片中,阻止了石墨烯片之间相互堆垛,而石墨烯片层之间相互连接,形成三维的空间导电网络,提高了材料的电子导电性.电化学测试表明,石墨烯片作为稳定的框架,能够有效缓冲活性物质在脱嵌锂过程中产生的体积变化,在500 m A·g^(-1)电流密度下循环190次后,Zn_2GeO_4@RGO复合材料的嵌锂容量仍有1189.5 m Ah·g^(-1);在3.2 A·g^(-1)的大电流密度下,嵌锂容量达到449.5m Ah·g^(-1),表明该复合材料具有优异的长循环稳定性和良好的倍率性能.
文摘Three open\|framework zinc germanophosphates have been synthesized from ethylene glycol systems of Zn(Ac)\-2·2H\-2O\|H\-3PO\-4\|\%R\%\|GeO\-2\|Py\|EG, where \%R\% stands for an amine and EG for ethylene glycol. It was found that by selecting proper amines as structure\|directing templates during crystallization open\|framework zinc germanophosphates were synthesized. The structures of the zinc germanophosphates were characterized by X\|ray diffraction(XRD), scanning electron microscopy(SEM), inductively coupled plasma(ICP) analysis, infrared spectroscopy(IR).
