用于高性能坚固超级电容器的二氧化锰纳米棒插层氧化石墨烯/聚苯胺三元复合材料

MnO2 nanorods intercalating graphene oxide/polyaniline ternary composites for robust high-performance supercapacitors.

作者信息

Han Guangqiang, Liu Yun, Zhang Lingling, Kan Erjun, Zhang Shaopeng, Tang Jian, Tang Weihua

机构信息

Key Laboratory of Soft Chemistry and Functional Materials (Ministry of Education of China), Nanjing University of Science and Technology, Nanjing 210094, People's Republic of China.

Department of Applied Physics, Nanjing University of Science and Technology, Nanjing 210094, P. R. China.

出版信息

Sci Rep. 2014 Apr 28;4:4824. doi: 10.1038/srep04824.

New ternary composites of MnO2 nanorods, polyaniline (PANI) and graphene oxide (GO) have been prepared by a two-step process. The 100 nm-long MnO2 nanorods with a diameter ~20 nm are conformably coated with PANI layers and fastened between GO layers. The MnO2 nanorods incorporated ternary composites electrode exhibits significantly increased specific capacitance than PANI/GO binary composite in supercapacitors. The ternary composite with 70% MnO2 exhibits a highest specific capacitance reaching 512 F/g and outstanding cycling performance, with ~97% capacitance retained over 5000 cycles. The ternary composite approach offers an effective solution to enhance the device performance of metal-oxide based supercapacitors for long cycling applications.

通过两步法制备了二氧化锰纳米棒、聚苯胺（PANI）和氧化石墨烯（GO）的新型三元复合材料。直径约20 nm、长度为100 nm的二氧化锰纳米棒被聚苯胺层均匀包覆，并固定在氧化石墨烯层之间。在超级电容器中，掺入二氧化锰纳米棒的三元复合材料电极的比电容比聚苯胺/氧化石墨烯二元复合材料显著增加。含有70%二氧化锰的三元复合材料表现出最高比电容，达到512 F/g，并且具有出色的循环性能，在5000次循环后电容保持率约为97%。三元复合材料方法为增强基于金属氧化物的超级电容器在长循环应用中的器件性能提供了有效解决方案。