Preparation, Characterization and Electrochemical Performance of Cobalt, Nickel-based Bimetallic Compounds and MXene Composite Materials
Discuss this preprint
Start a discussion What are Sciety discussions?Listed in
This article is not in any list yet, why not save it to one of your lists.Abstract
Among numerous energy storage materials, two-dimensional Ti 3 C 2 T x -MXene has demonstrated great potential in the electrochemical field due to its unique layered structure, excellent electrical conductivity, large specific surface area and good chemical stability. MXene was prepared by the molten salt method in this paper, using nickel chloride as the etchant, and layered Ti 3 C 2 T x -MXene was obtained. Co(NO 3 ) 2 ·6H 2 O and Ni(NO 3 ) 2 ·6H 2 O were co-reacted with MXene through a hydrothermal reaction to successfully prepare the composite material CoNi/MXene. The results show that when the molar ratio of cobalt nitrate to nickel nitrate is 2:1, the composite material exhibits the most excellent electrochemical energy storage performance. At a current density of 1 A g − 1 , the specific capacity reached 1390 F g − 1 . At a high current density of 5 A g − 1 , the initial specific capacity was 937 F g − 1 . After 1000 cycles, the capacity retention rate was 73.3% (687 F g − 1 ), demonstrating excellent cycling stability.
