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聚噻吩/纳米MnO2复合材料的制备表征及电化学性能

, PP. 628-634

Keywords: 复合材料,充放电性能,原位化学氧化聚合法,聚噻吩,二氧化锰

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Abstract:

纳米二氧化锰(MnO2)作为超级电容材料已被广泛研究。为了改善其充放电性能,采用原位化学氧化聚合法制备聚噻吩/纳米MnO2(PTh/MnO2)复合材料,对纳米MnO2进行性能改性。通过改变聚噻吩在PTh/MnO2复合材料中的掺杂量,制备出一系列的复合材料。采用傅里叶转换红外光谱(FIIR)、X射线衍射仪(XRD)、场发射扫描电子显微镜(FE-SEM)和透射电子显微镜(TEM)对PTh/MnO2复合材料的化学性能、晶体结构以及表面形貌等进行了详细考察。接着采用CT001A型电池测试系统对以PTh/MnO2复合材料做负极所制得的密封扣式电池进行了充放电性能测试。结果表明,MnO2和聚噻吩在不同的PTh/MnO2复合材料中形貌各异。当聚噻吩含量为8wt%~10wt%时,MnO2在PTh/MnO2复合材料中分布最为均匀;当聚噻吩含量较高时,MnO2的形貌受到严重影响,其原来的管状结构接近消失。聚噻吩含量的不同,同样也影响了电池的充放电性能。当聚噻吩的含量为20wt%时,在循环20次后,电池的平衡容量为最高,可达700mAh/g。这明显高于以纳米MnO2为负极时的电池容量。由此可见,聚噻吩对纳米MnO2的充放电性能具有明显的增强作用。该研究为PTh/MnO2复合材料作为电池负极材料的使用提供了实验基础。

References

[1]  Xiao W, Chen J S, Lu Q, et al. Porous spheres assembled from polythiophene (PTh)-coated ultrathin MnO2 nanosheets with enhanced lithium storage capabilities [J].The Journal of Physical Chemistry C, 2010, 114(27): 12048-12051.
[2]  Lu Q, Zhou Y K. Synthesis of mesoporous polythiophene/MnO2 nanocomposite and its enhanced pseudocapacitive properties [J].Journal of Power Sources, 2011, 196(8): 4088-4094.
[3]  Jiang H, Ma J, Li C Z. Polyaniline-MnO2 coaxial nanofiber with hierarchical structure for high-performance supercapacitors [J].Journal of Materials Chemistry, 2012, 22(33): 16939-16942.
[4]  Wang Y G, Wu W, Cheng L, et al. A polyaniline-intercalated layered manganese oxide nanocomposite prepared by an inorganic/organic interface reaction and its high electrochemical performance for Li storage[J].Advanced Materials, 2008, 20(11): 2166-2170.
[5]  Gangopadhyay R, de Amitabha. Conducting polymer nanocomposites: a brief overview[J].Chemistry of Materials, 2000, 12 (3): 608-622.
[6]  Duay J, Gillette E, Liu R, et al. Highly flexible pseudocapacitor based on freestanding heterogeneous MnO2/conductive polymer nanowire arrays[J]. Physical Chemistry Chemical Physics, 2012, 14(10): 3329-3337.
[7]  Wang J G, Yang Y, Huang Z H, et al. Rational synthesis of MnO2/conducting polypyrrole@carbon nanofiber triaxial nano-cables for high-performance supercapacitors [J]. Journal of Materials Chemistry, 2012, 22(33): 16943-16949.
[8]  Frackowiak E, Khomenko V, Jurewicz K, et al. Supercapacitors based on conducting polymers/nanotubes composites [J].Journal of Power Sources, 2006, 153(2): 413-418.
[9]  曾望东, 丁 娉, 潘春跃. 聚合物太阳能电池材料的研究进展 [J].广州化工, 2011, 38 (7): 43-46. Zeng Wangdong, Ding Ping, Pan Chunyue. Research progress of polymer solar cell materials [J]. Guangzhou Chemical Industry, 2011, 38 (7): 43-46.
[10]  庞 起, 韩建鹏, 梁春杰, 等. Zn/纳米棒阵列ZnO/聚噻吩复合电极的制备及光电化学性质 [J]. 功能材料, 2010, 41(6): 997-1000. Pang Qi, Han Jianpeng, Liang Chunjie, et al. Preparation and photoelectrochemical properties Zn/ZnO nanorod arrays/ polythiophene film [J]. Journal of Functional Materials, 2010, 41(6): 997-1000.
[11]  陈 晗, 向楷雄, 龚文强, 等. LiFePO4/聚噻吩复合材料的制备及电化学性能 [J].功能材料, 2010, 41(9): 1660-1663. Chen Han, Xiang Kaixiong, Gong Wenqiang, et al. Preparation and electrochemical performance of LiFePO4/polythiophenes composites [J]. Journal of Functional Materials, 2010, 41(9): 1660-1663.
[12]  生 瑜, 陈建定, 朱德钦. 导电聚苯胺/二氧化锰复合材料原位化学合成制备及表征 [J]. 复合材料学报, 2004, 21(4): 1-7. Sheng Yu, Chen Jianding, Zhu Deqin, et al. In-situ chemical synthesis and characterization of conducting polyaniline/manganese dioxide composites [J]. Acta Materiae Compositae Sinica, 2004, 21(4): 1-7.
[13]  Uygl A, Turkoglu O, Sen S, et al.The electrical conductivity properties of polythiophene/TiO2 nanocomposites prepared in thepresence of surfactants [J].Current Applied Physics, 2009, 9(4): 866-87.

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