TY - JOUR
T1 - Preparation of CuMn2O4/Ti3C2 MXene composite electrodes for supercapacitors with high energy density and study on their charge transfer kinetics
AU - Beknalkar, Sonali A.
AU - Teli, Aviraj M.
AU - Khot, Atul C.
AU - Mane, Sagar M.
AU - Shin, Jae Cheol
N1 - Publisher Copyright:
© 2023 Elsevier Ltd and Techna Group S.r.l.
PY - 2023/10/1
Y1 - 2023/10/1
N2 - In this study, we present a novel electrode material that combines Ti3C2 MXene and high-capacity CuMn2O4 to increase the energy density of supercapacitors, which are a popular choice for energy storage due to their high-performance potential. The electrode material was synthesized using the hydrothermal method with varying deposition times (3 h, 6 h and 9 h), and the resulting composite materials were characterized using advanced analytical techniques. The CuMn2O4/MXene composite electrode synthesized at 3h exhibited exceptional performance, with a specific capacitance of 628 mF/cm2 at 4 mA/cm2, due to the enhanced electrical conductivity and charge storage properties of CuMn2O4 and MXene sheets. We also uncovered an intricate charge transfer mechanism and storage kinetics of CuMn2O4/MXene composite on a nickel foam electrode, revealing a diffusion-controlled energy storage mechanism with fast mass transportation. To demonstrate practicality, we constructed an asymmetric coin cell supercapacitor device using CuMn2O4/MXene composite synthesized at 3h and activated carbon as the positive and negative electrodes, respectively. The device showed a specific capacitance of 496 mF/cm2 at 6 mA/cm2 with cyclic stability of 80% for up to 10,000 cycles, and a power density of 1.5 mW/cm2 at a higher energy density of 0.073 mWh/cm2. Our results demonstrate the potential to significantly advance the development of high-performance supercapacitors by combining Ti3C2 MXene and high-capacity oxides, refining the synthesis process, and exploring innovative electrode architectures.
AB - In this study, we present a novel electrode material that combines Ti3C2 MXene and high-capacity CuMn2O4 to increase the energy density of supercapacitors, which are a popular choice for energy storage due to their high-performance potential. The electrode material was synthesized using the hydrothermal method with varying deposition times (3 h, 6 h and 9 h), and the resulting composite materials were characterized using advanced analytical techniques. The CuMn2O4/MXene composite electrode synthesized at 3h exhibited exceptional performance, with a specific capacitance of 628 mF/cm2 at 4 mA/cm2, due to the enhanced electrical conductivity and charge storage properties of CuMn2O4 and MXene sheets. We also uncovered an intricate charge transfer mechanism and storage kinetics of CuMn2O4/MXene composite on a nickel foam electrode, revealing a diffusion-controlled energy storage mechanism with fast mass transportation. To demonstrate practicality, we constructed an asymmetric coin cell supercapacitor device using CuMn2O4/MXene composite synthesized at 3h and activated carbon as the positive and negative electrodes, respectively. The device showed a specific capacitance of 496 mF/cm2 at 6 mA/cm2 with cyclic stability of 80% for up to 10,000 cycles, and a power density of 1.5 mW/cm2 at a higher energy density of 0.073 mWh/cm2. Our results demonstrate the potential to significantly advance the development of high-performance supercapacitors by combining Ti3C2 MXene and high-capacity oxides, refining the synthesis process, and exploring innovative electrode architectures.
KW - Charge storage kinetics
KW - CuMnO
KW - High performance energy storage
KW - TiC Mxene
UR - http://www.scopus.com/inward/record.url?scp=85164730847&partnerID=8YFLogxK
U2 - 10.1016/j.ceramint.2023.07.071
DO - 10.1016/j.ceramint.2023.07.071
M3 - Article
AN - SCOPUS:85164730847
SN - 0272-8842
VL - 49
SP - 31236
EP - 31247
JO - Ceramics International
JF - Ceramics International
IS - 19
ER -