Pyrolysis of hexa(phenyl)benzene derivatives: a molecular approach toward carbonaceous materials for Li-ion storage
Pyrolysis of hexa(phenyl)benzene derivatives: a molecular approach toward carbonaceous materials for Li-ion storage
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DOI：
10.1016/j.jpowsour.2004.06.069
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发表时间：
2005-01
影响因子：
9.2
通讯作者：
T. Renouard;L. Gherghel;M. Wachtler;F. Bonino;B. Scrosati;R. Nuffer;C. Mathis;K. Müllen
中科院分区：
文献类型：
--
作者：
T. Renouard;L. Gherghel;M. Wachtler;F. Bonino;B. Scrosati;R. Nuffer;C. Mathis;K. Müllen
以六苯基苯（HPB）和六对溴苯基苯（HPB-Br）为原料，在温和条件下进行可控热解，制备了锂离子电池用炭材料。实验在抽空的密封安瓿中进行，并采用不同的温度（范围为500-600°C）和加热时间（1至5天）。热解产物为黑色薄片，并通过元素分析、热重分析、UV-vis-NIR和拉曼光谱对其进行表征。扫描电子显微镜表现出几种结构（纳米棒，束，微球）的薄片的表面上，这取决于前体和热解程序。初步电化学测量显示锂储存容量高达500 mAhg-1。
Hexa(phenyl)benzene (HPB) and hexakis(p-bromophenyl)benzene (HPB-Br) were submitted to controlled pyrolysis under mild conditions to prepare carbonaceous materials for Li-ion storage. Experiments were performed in evacuated sealed ampoules and different temperatures (in the range 500–600°C) and heating times (1 upto 5 days) were applied. Pyrolytic products were obtained as black flakes and characterised by elemental analysis, thermogravimetric analysis, UV–vis–NIR and Raman spectroscopies. Scanning electron microscopy exhibited several structures (nanorods, bundles, microspheres) on the surface of the flakes, depending on the precursor and on the pyrolysis procedure. Preliminary electrochemical measurements revealed lithium storage capacities upto 500mAhg−1.