Novel binder-free electrode materials for supercapacitors utilizing high surface area carbon nanofibers derived from immiscible polymer blends of PBI/6FDA-DAM: DABA

被引:36
作者
Abeykoon, Nimali C. [1 ]
Garcia, Velia [1 ]
Jayawickramage, Rangana A. [1 ]
Perera, Wijayantha [1 ]
Cure, Jeremy [3 ]
Chabal, Yves J. [3 ]
Balkus, Kenneth J. [1 ,2 ]
Ferraris, John P. [1 ,2 ]
机构
[1] Univ Texas Dallas, Dept Chem & Biochem, 800 W Campbell Rd, Richardson, TX 75080 USA
[2] Univ Texas Dallas, Alan G MacDiarmid NanoTech Inst, 800 W Campbell Rd, Richardson, TX 75080 USA
[3] Univ Texas Dallas, Dept Mat Sci & Engn, 800 W Campbell Rd, Richardson, TX 75080 USA
基金
美国国家科学基金会;
关键词
INDUCED CROSS-LINKING; POLYACRYLONITRILE FIBERS; ACTIVATED CARBONS; PERFORMANCE; POLYIMIDE; MEMBRANES;
D O I
10.1039/c7ra01727h
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Carbon nanofibers with high surface area have become promising electrode materials for supercapacitors because of their importance in increasing energy density. In this study, a high free volume polymer, 6FDADAM: DABA (6FDD) was blended with polybenzimidazole (PBI) in different ratios to obtain different compositions of PBI/6FDD immiscible polymer blends. Freestanding nanofiber mats were obtained via electrospinning using blend precursors dissolved in N, N-dimethylacetamide (DMAc). Subsequently, carbonization, followed by CO2 activation at 1000 degrees C was applied to convert the fiber mats into porous carbon nanofibers (CNFs). The addition of 6FDD shows significant effects on the microstructure and enhancement of the surface area of the CNFs. The obtained CNFs show specific surface area as high as 3010 m(2) g(-1) with pore sizes comparable to those of the electrolyte ions (PYR14TFSI). This provides good electrolyte accessibility to the pore of the carbon materials resulting in enhanced energy density compared to the CNFs obtained from pure PBI. Electrodes derived from PBI: 6FDD (70 : 30) exhibited outstanding supercapacitor performance in coin cells with a specific capacitance of 142 F g(-1) at the scan rate of 10 mV s(-1) and energy density of 67.5 W h kg(-1) at 1 A g(-1) (58 W h kg(-1) at 10 A g(-1)) thus demonstrating promising electrochemical performance for high performance energy storage system.
引用
收藏
页码:20947 / 20959
页数:13
相关论文
共 51 条
[1]   Supercapacitor performance of carbon nanofiber electrodes derived from immiscible PAN/PMMA polymer blends [J].
Abeykoon, Nimali C. ;
Bonso, Jeliza S. ;
Ferraris, John P. .
RSC ADVANCES, 2015, 5 (26) :19865-19873
[2]   The characterization of activated carbons with oxygen and nitrogen surface groups [J].
Biniak, S ;
Szymanski, G ;
Siedlewski, J ;
Swiatkowski, A .
CARBON, 1997, 35 (12) :1799-1810
[3]   High-Performance Supercapacitor Electrode Materials from Cellulose-Derived Carbon Nanofibers [J].
Cai, Jie ;
Niu, Haitao ;
Li, Zhenyu ;
Du, Yong ;
Cizek, Pavel ;
Xie, Zongli ;
Xiong, Hanguo ;
Lin, Tong .
ACS APPLIED MATERIALS & INTERFACES, 2015, 7 (27) :14946-14953
[4]   Nitrogen-Enriched Porous Carbon Nanofiber Mat as Efficient Flexible Electrode Material for Supercapacitors [J].
Choudhury, Arup ;
Kim, Ji-Hoon ;
Mahapatra, Susanta Sinha ;
Yang, Kap-Seung ;
Yang, Duck-Joo .
ACS SUSTAINABLE CHEMISTRY & ENGINEERING, 2017, 5 (03) :2109-2118
[5]   An in situ FTIR study of undoped PolySenzoImadazole as a function of relative humidity [J].
Christensen, P. A. ;
Jones, S. W. M. .
POLYMER DEGRADATION AND STABILITY, 2014, 105 :211-217
[6]   The role and utilization of pseudocapacitance for energy storage by supercapacitors [J].
Conway, BE ;
Birss, V ;
Wojtowicz, J .
JOURNAL OF POWER SOURCES, 1997, 66 (1-2) :1-14
[7]  
Gong G., 2012, CHEM APPL, P127
[8]   Effects of coalescence and breakup on the steady state morphology of an immiscible polymer blend in shear flow [J].
Grizzuti, N ;
Bifulco, O .
RHEOLOGICA ACTA, 1997, 36 (04) :406-415
[9]   Determination and enhancement of the capacitance contributions in carbon nanotube based electrode systems [J].
Hoefer, M. ;
Bandaru, P. R. .
APPLIED PHYSICS LETTERS, 2009, 95 (18)
[10]   Hydrogen separation and purification in membranes of miscible polymer blends with interpenetration networks [J].
Hosseini, Seyed Saeid ;
Teoh, May May ;
Chung, Tai Shung .
POLYMER, 2008, 49 (06) :1594-1603