TY - JOUR
T1 - Enhanced capacitance of MXene synthesized through safer route and its composite with amino graphene oxide
AU - Karmakar, Mrinmoy
AU - Swain, Mukul
AU - Punyasloka, Saibrata
AU - Mondal, Biswajit
AU - Noriyoshi, Matsumi
AU - Ghoroi, Chinmay
N1 - Publisher Copyright:
© 2024 Elsevier B.V.
PY - 2025/2/1
Y1 - 2025/2/1
N2 - Two-dimensional (2D) MXene has received a lot of attention recently due to its outstanding mechanical, electrical, and thermal stability. However, poor specific capacitance severely limits its application towards supercapacitor. Moreover, the existing hazardous synthesis route of MXene is also a concern in the scientific community. On the other hand, amino graphene oxide (AGO) has very high electrical properties yet it is thermally unstable beyond 160 °C. Therefore, the present work reports a novel composite consisting of MXene and AGO, i.e., MAC, capable of exhibiting superior electrical properties along with the elevated thermal stability. Importantly, the MXene has been synthesized by a greener technology by using a mixture of concentrated HCl and NH4F to produce HF (etching agent) in situ rather than its ex situ addition. The formation of MAC is confirmed from microscopic (FE-SEM), thermal (TGA), diffractometric (XRD), spectroscopic (FTIR and XPS), and BET analyses. The thermogravimetric (TG) result shows that there is a significant improvement in thermal stability of AGO in the MAC. Moreover, synthesized MXene using safer route and MAC shows significant improvement in specific capacitance (2084.39 F g−1 at scan rate of 5 mV s−1 in PBS buffer solution) which is approximately twice than most of the reported capacitance in the literature. The improved thermal and electrochemical properties of MXene-AGO composite enhance its the potential use as supercapacitor.
AB - Two-dimensional (2D) MXene has received a lot of attention recently due to its outstanding mechanical, electrical, and thermal stability. However, poor specific capacitance severely limits its application towards supercapacitor. Moreover, the existing hazardous synthesis route of MXene is also a concern in the scientific community. On the other hand, amino graphene oxide (AGO) has very high electrical properties yet it is thermally unstable beyond 160 °C. Therefore, the present work reports a novel composite consisting of MXene and AGO, i.e., MAC, capable of exhibiting superior electrical properties along with the elevated thermal stability. Importantly, the MXene has been synthesized by a greener technology by using a mixture of concentrated HCl and NH4F to produce HF (etching agent) in situ rather than its ex situ addition. The formation of MAC is confirmed from microscopic (FE-SEM), thermal (TGA), diffractometric (XRD), spectroscopic (FTIR and XPS), and BET analyses. The thermogravimetric (TG) result shows that there is a significant improvement in thermal stability of AGO in the MAC. Moreover, synthesized MXene using safer route and MAC shows significant improvement in specific capacitance (2084.39 F g−1 at scan rate of 5 mV s−1 in PBS buffer solution) which is approximately twice than most of the reported capacitance in the literature. The improved thermal and electrochemical properties of MXene-AGO composite enhance its the potential use as supercapacitor.
KW - 2D-materials
KW - Amino graphene oxide
KW - MXene
KW - Specific capacitance
KW - Supercapacitor
UR - http://www.scopus.com/inward/record.url?scp=85209872723&partnerID=8YFLogxK
U2 - 10.1016/j.matchemphys.2024.130187
DO - 10.1016/j.matchemphys.2024.130187
M3 - Article
AN - SCOPUS:85209872723
SN - 0254-0584
VL - 331
JO - Materials Chemistry and Physics
JF - Materials Chemistry and Physics
M1 - 130187
ER -
