TY - JOUR
T1 - 3D hierarchical nanoarrays composed of NiCo-Te multilayer nanoneedles modified with Co1.29Ni1.71O4for high-performance hybrid supercapacitors
AU - Shi, Chao
AU - Yang, Qingjun
AU - Deng, Chengyu
AU - Chen, Shengyu
AU - Hao, Yue
AU - Yan, Yongsheng
AU - Wei, Maobin
N1 - Publisher Copyright:
© The Royal Society of Chemistry and the Centre National de la Recherche Scientifique 2021.
PY - 2021/11/14
Y1 - 2021/11/14
N2 - Transition metal tellurides have been developed as electrodes for supercapacitors owing to their high pseudocapacitance and excellent electrical conductivity. However, the limited surface-active sites limit the improvement of capacity performance. Herein, the 3D hierarchical nanoarrays consisting of NiCo-Te nanoneedles modified with Co1.29Ni1.71O4were designed and synthesized on nickel foam (NF@NiCo-Te/Co1.29Ni1.71O4). In particular, due to the design of bimetallic telluride structure with multiple oxidation states and the surface modification of bimetallic oxides with adequate active sites, the prepared NF@NiCo-Te/Co1.29Ni1.71O4shows rapid and invertible redox reaction during the process of energy storage. At the current density of 1.0 A g−1, the as-prepared electrode material can express a high specific capacitance of 186.5 mA h g−1(1332 F g−1). Significantly, electrolyte ions can easily complete intercalation and deintercalation due to the multilayer structure of nanoneedles, and the hybrid supercapacitors assembled by activated carbon (negative electrode) and NF@NiCo-Te/Co1.29Ni1.71O4(positive electrode) deliver a maximum energy density of 63.4 W h kg−1at 800 W kg−1. In addition, the capacity retention ratio of NF@NiCo-Te/Co1.29Ni1.71O4//AC remains 83.85% after 5000 high-current charge-discharge cycles. Therefore, the 3D architecture electrodes based on bimetallic tellurides with unique structures possess a great application value in energy storage.
AB - Transition metal tellurides have been developed as electrodes for supercapacitors owing to their high pseudocapacitance and excellent electrical conductivity. However, the limited surface-active sites limit the improvement of capacity performance. Herein, the 3D hierarchical nanoarrays consisting of NiCo-Te nanoneedles modified with Co1.29Ni1.71O4were designed and synthesized on nickel foam (NF@NiCo-Te/Co1.29Ni1.71O4). In particular, due to the design of bimetallic telluride structure with multiple oxidation states and the surface modification of bimetallic oxides with adequate active sites, the prepared NF@NiCo-Te/Co1.29Ni1.71O4shows rapid and invertible redox reaction during the process of energy storage. At the current density of 1.0 A g−1, the as-prepared electrode material can express a high specific capacitance of 186.5 mA h g−1(1332 F g−1). Significantly, electrolyte ions can easily complete intercalation and deintercalation due to the multilayer structure of nanoneedles, and the hybrid supercapacitors assembled by activated carbon (negative electrode) and NF@NiCo-Te/Co1.29Ni1.71O4(positive electrode) deliver a maximum energy density of 63.4 W h kg−1at 800 W kg−1. In addition, the capacity retention ratio of NF@NiCo-Te/Co1.29Ni1.71O4//AC remains 83.85% after 5000 high-current charge-discharge cycles. Therefore, the 3D architecture electrodes based on bimetallic tellurides with unique structures possess a great application value in energy storage.
UR - http://www.scopus.com/inward/record.url?scp=85118620994&partnerID=8YFLogxK
U2 - 10.1039/d1nj04260b
DO - 10.1039/d1nj04260b
M3 - 文章
AN - SCOPUS:85118620994
SN - 1144-0546
VL - 45
SP - 19795
EP - 19803
JO - New Journal of Chemistry
JF - New Journal of Chemistry
IS - 42
ER -