TY - JOUR
T1 - Towards high areal capacitance, rate capability, and tailorable supercapacitors
T2 - Co3O4@polypyrrole core-shell nanorod bundle array electrodes
AU - Ma, Longtao
AU - Fan, Huiqing
AU - Wei, Xinying
AU - Chen, Shengmei
AU - Hu, Qingzhao
AU - Liu, Yan
AU - Zhi, Chunyi
AU - Lu, Wei
AU - Zapien, Juan Antonio
AU - Huang, Haitao
PY - 2018/10/21
Y1 - 2018/10/21
N2 - Flexible supercapacitors with high areal capacitance are a promising approach for wearable energy-storage technology due to the limitation of the surface area of the human body (about 2 m2). Meanwhile, a tolerance to deformation and mechanic damage is critical for wearable applications. However, it is still a challenge to achieve supercapacitors with outstanding electrochemical performance and wearability, simultaneously. To solve this problem, we report high-performance, flexible, and tailorable solid-state supercapacitors enabled by Co3O4@PPy nanorod bundle arrays immobilized on carbon fiber cloth (CFC). Furthermore, a solid-state asymmetric supercapacitor was assembled using a freestanding Co3O4@PPy electrode, a freestanding porous carbon electrode, and PVA gel electrolyte. Benefiting from a 3D structure and the synergetic contribution of the Co3O4 nanorods and electrically conductive PPy layer, the Co3O4@PPy electrode and our developed supercapacitor exhibit a high areal capacitance of 6.67 F cm-2 at a current density of 2 mA cm-2, and 2.47 F cm-2 at 4 mA cm-2, respectively, as well as excellent rate capability. More importantly, the solid-state supercapacitor can be tailored into several units and various shapes. Each unit retains its original electrochemical performance. This work provides a new route to wearable energy-storage technology.
AB - Flexible supercapacitors with high areal capacitance are a promising approach for wearable energy-storage technology due to the limitation of the surface area of the human body (about 2 m2). Meanwhile, a tolerance to deformation and mechanic damage is critical for wearable applications. However, it is still a challenge to achieve supercapacitors with outstanding electrochemical performance and wearability, simultaneously. To solve this problem, we report high-performance, flexible, and tailorable solid-state supercapacitors enabled by Co3O4@PPy nanorod bundle arrays immobilized on carbon fiber cloth (CFC). Furthermore, a solid-state asymmetric supercapacitor was assembled using a freestanding Co3O4@PPy electrode, a freestanding porous carbon electrode, and PVA gel electrolyte. Benefiting from a 3D structure and the synergetic contribution of the Co3O4 nanorods and electrically conductive PPy layer, the Co3O4@PPy electrode and our developed supercapacitor exhibit a high areal capacitance of 6.67 F cm-2 at a current density of 2 mA cm-2, and 2.47 F cm-2 at 4 mA cm-2, respectively, as well as excellent rate capability. More importantly, the solid-state supercapacitor can be tailored into several units and various shapes. Each unit retains its original electrochemical performance. This work provides a new route to wearable energy-storage technology.
UR - http://www.scopus.com/inward/record.url?scp=85054877501&partnerID=8YFLogxK
U2 - 10.1039/c8ta07477a
DO - 10.1039/c8ta07477a
M3 - Journal article
AN - SCOPUS:85054877501
SN - 2050-7488
VL - 6
SP - 19058
EP - 19065
JO - Journal of Materials Chemistry A
JF - Journal of Materials Chemistry A
IS - 39
ER -