Functionalized Composites based on Graphene and its application in Energy Storage

石墨烯独特的单原子层结构赋予其丰富而奇特的物理化学性质，使其在纳米电子器件，化学电源，太阳能电池，电子显示器，热/电传导器件和功能性复合材料中具有广泛的应用。 本文围绕石墨烯及其功能化复合材料，并对其在储能器件中的应用开展研究。主要内容如下： 1.研究提出了大批量制备氧化石墨烯（GO）的新方法。通过对Hummers法的研究和改进，使用膨胀石墨取代常用的鳞片石墨材料进行氧化剥离，提高了单层GO的剥离效率和产量，简化了反应步骤，缩短了反应时间，可直接剥离得到单层GO，无需经过超声剥离即可用于下一步复合材料的制备合成，为大量制备单层GO并用于复合材料的合成打下基础。 2.采用原位方法制备了基于...Since the first preparation of graphene in 2004, the single atom layer structure endows graphene with particular physical and chemical properties, and it has wide applications in nanoscal electronic devices, batteries, solar cells, electronic display, thermal/electric conduction devices and functional composite materials. In this paper, we focused on graphene oxide and its functional composites, ...学位：理学博士院系专业：化学化工学院_化学学号：2052010015367

The Composite Based on Graphene and Its Application in Energy Storage

能源问题是人类社会未来面临的重大挑战,从实现电能与化学能相互转换的角度而言,作为一种二维结构材料,石墨烯不仅可以构筑电子导电网络,也可实现对反应活性物种状态的设计和调控,进而改变反应的热力学和动力学,在电化学储能系统中具有十分重要的意义.本文主要介绍了石墨烯的制备方法及其在构筑电子导电网络以实现对反应活性物种状态的设计和调控方面的作用和功能,分别就其在构筑硫复合材料、氧化物复合材料、导电聚合物复合材料等方面进行了讨论,并结合相应的电化学储能系统评价这些复合材料的性能.The energy crisis is a major challenge for the human society in the future.As a material with two-dimensional structure,graphene can not only build electronic conductive network,but also realize the design and control of the status of reactive species,and then change the thermodynamics and kinetics of reactions.Thus,graphene is of great significance in electrochemical energy storage systems in terms of realizing the transformation from chemical energy to electric energy.This paper mainly reviews the preparation methods of graphene and its functions in constructing electronic conductive network to realize the design and regulation of the status of reactive species.We discuss the construction of sulfur composite materials,oxide composite materials,and conductive polymer composites,and evaluate the performances of these composite materials in corresponding electrochemical energy storage systems.国家自然科学基金(U1305246;21321062); 厦门市电动车重大专项(3502Z20121002

室温铁磁性Al2O3∶Mn的制备及性质

以Al2O3为衬底利用多能态离子注入法在离子注入设备上制备了一系列具有室温铁磁性的Al2O

Electrochemical Performance of Polytriphenylamine as a Novel Non-Aqueous Supercapcitor Cathode Material

应用异相沉淀法制备聚三苯胺/活性炭复合材料.SEM及电化学测试表明:聚三苯胺与活性炭复合后,材料的粒径从150 nm左右下降到几十nm,该电极具有良好的倍率性能和循环性能,0.5 C倍率放电容量从88.5mAh/g增至105 mAh/g左右,40 C倍率放电容量约达70 mAh/g左右,1000周循环的容量基本不衰减.The PTPAn/active carbon compounds were synthesized by heterogeneous precipitation method.The SEM results show that the size of the PTPAn decreases from about 150 nm to few ten nanometers after being incorporated with active carbon.The PTPAn/active carbon compounds have excellent rate and cycling performance:the discharge capacity increases from 88.5 mAh/g to 105 mAh/g at 0.5 C charge/discharge rate and can reach to 70 mAh/g even at 40 C charge/discharge rate.And the capacity retention of the PTPAn/active carbon compounds remain almost unchanged after 1000 cycles at 40 C charge/discharge rate.作者联系地址：厦门大学固体表面物理化学国家重点实验室化学化工学院化学系;Author's Address: State Key Lab of Physical Chemistry of Solid Surfaces,Department of Chemistry,College of Chemistry and Chemical Engineering,Xiamen University,Xiamen 361005,Fujian,Chin

利用温度周期调制生长氧化锌材料的方法

 一种利用温度周期调制生长氧化锌材料的方法,该方法包括以下步骤：步骤1：选用一衬底,并在MOCVD设备的低温生长区中对衬底进行锌化处理；步骤2：用载气将含锌源的金属有机化合物和笑气分别通入MOCVD设备的低温生长区中,在低温生长区对衬底进行一层低温氧化锌材料的生长；步骤3：关闭金属有机化合物和笑气,通过MOCVD设备的传动装置,将低温下生长的氧化锌材料从反应室的低温生长区移动至高温退火区,进行高温快速退火；步骤4：通过传动装置,将高温快速退火之后生长有氧化锌材料的衬底从高温退火区移动至低温生长区,重复步骤2、步骤3若干次；步骤5：待低温生长区温度降至室温后,利用传动装置将生长有氧化锌材料的衬底移动至取样区,取出样品,完成氧化锌材料的生长