3D Aperiodic Hierarchical Porous Graphitic Carbon Material for High‐Rate Electrochemical Capacitive Energy Storage

Abstract

The authors have recently recognized an error in their Communication. A calculation error in the data of the energy density for HPGC materials in the organic electrolyte, as shown in Figure 3 c, has been noticed but it does not influence their conclusions. The redrawn Figure 3 c is plotted below. Correspondingly, the related statements on this topic (line 6–12, the first paragraph starting on page 375) should be corrected as following: “Even at a current drain time shorter than 2 s, the energy and power densities of HPGC were 10.8 Wh kg−1 and 21 kW kg−1, respectively, thereby exceeding the PNGV power target; this result is comparable to that obtained for small-pore ECs at a drain time of about 6 s (that is, 23.8 Wh kg−11 and 15 kW kg−11, calculated from the capacitance data given in Ref. [23])”. Electrochemical performance of the HPGC material: […︁] c) Ragone plot showing the position of HPGC material relative to those of CMK-3, CMK-5,[19] activated carbon(Maxsorb, Japan), ALG-C,[16] PVA porous carbon,[22] and small-pore ECs.[23] The dotted lines show the current drain time. The weight of the cell components is not included in these E/P calculations. The compared E/P values were calculated from the capacitance data given in corresponding references. The PNGV power target (15 kW kg−1, in terms of electrode active material weight) is shown. Additionally, the authors have given the power–energy density relation of HPGC material measured with ionic liquid (BMImBF4) as a high-voltage electrolyte in the Figure 3 c. The new result also confirms the promise and feasibility of HPGC materials for use in advanced supercapacitors with high power and energy densities.