TY - JOUR

T1 - Hierarchically nanostructured hollow carbon nanospheres for ultra-fast and long-life energy storage

AU - Klose, Markus

AU - Reinhold, Romy

AU - Pinkert, Katja

AU - Uhlemann, Martin

AU - Wolke, Florian

AU - Balach, Juan

AU - Jaumann, Tony

AU - Stoeck, Ulrich

AU - Eckert, Jürgen

AU - Giebeler, Lars

PY - 2016/9/1

Y1 - 2016/9/1

N2 - We report on the successful application of porous hollow carbon nanospheres consisting of graphitic shells with a hierarchical porosity that were obtained by carbonizing an iron-containing commercially available metal-organic framework, as active material for supercapacitors. The influence of basic key parameters, such as the degree of graphitization and the accessible surface area of the carbons obtained at different temperatures, on the electrochemical performance is discussed in-depth. A high specific capacitance of 91 F g−1 in an aqueous electrolyte and 156 F g−1 using an ionic liquid is achieved. Furthermore a very steady specific capacitance over the course of 10,000 charge-discharge cycles is demonstrated. In addition, electrochemical impedance spectroscopy studies revealed that these carbons can feature a stable performance over several orders of magnitude of frequency, which render them interesting candidates for future electrochemical energy storage systems.

AB - We report on the successful application of porous hollow carbon nanospheres consisting of graphitic shells with a hierarchical porosity that were obtained by carbonizing an iron-containing commercially available metal-organic framework, as active material for supercapacitors. The influence of basic key parameters, such as the degree of graphitization and the accessible surface area of the carbons obtained at different temperatures, on the electrochemical performance is discussed in-depth. A high specific capacitance of 91 F g−1 in an aqueous electrolyte and 156 F g−1 using an ionic liquid is achieved. Furthermore a very steady specific capacitance over the course of 10,000 charge-discharge cycles is demonstrated. In addition, electrochemical impedance spectroscopy studies revealed that these carbons can feature a stable performance over several orders of magnitude of frequency, which render them interesting candidates for future electrochemical energy storage systems.

UR - http://www.scopus.com/inward/record.url?scp=84970016640&partnerID=8YFLogxK

U2 - 10.1016/j.carbon.2016.05.046

DO - 10.1016/j.carbon.2016.05.046

M3 - Article

AN - SCOPUS:84970016640

VL - 106.2016

SP - 306

EP - 313

JO - Carbon

JF - Carbon

SN - 0008-6223

IS - September

ER -