Hierarchical porous ZnMn2O4 microspheres architectured with sub-nanoparticles as a high performance anode for lithium ion batteries

Room-temperature solution synthesis of ZnMn2O4 nanoparticles for advanced electrochemical lithium storage

“…16 In the corresponding anodic scan, two oxidation peaks at approximately 1.2 and 1.5 V are associated to the reversible oxidation of Zn 0 and Mn 0 , and formation of ZnO and MnO, respectively. 24,25 In the following scans, the reduction peak for conversion reaction shis from 0.41 V to 0.49 V, ascribing to the small overpotentials induced by smaller particles. 22 Furthermore, the following CV proles almost completely superimposed for each other, suggesting the excellent reversibility and stability of ZnMn 2 O 4 anode.…”

Mesoporous ZnMn2O4 Microtubules Derived from a Biomorphic Strategy for High-Performance Lithium/Sodium Ion Batteries

“…The last significant mass loss of 21.8% is observed from 350 to 420 °C, which is related to the burning out of the cotton fiber. , At temperatures higher than 420 °C, the weight loss shown in the TG profile remains almost constant, suggesting that all of the reactions have finished and the calcination temperature of 700 °C used in this work is high enough for the full transformation from the precursor to pure spinel ZnMn 2 O 4 . Furthermore, nitrogen adsorption and desorption isotherm of ZMO-MT reveals a type IV isotherm with a H1-type hysteresis loop (Figure b), implying the presence of a mesoporous structure in the product. , On the basis of the density functional theory method, the Brunauer–Emmett–Teller (BET) surface area of ZMO-MT is estimated to be 48.5 m 2 g –1 with the average pore size of 5 nm (inset in Figure b), which is larger than that of ZnMn 2 O 4 materials reported by other groups. ,,,− Such a large BET surface area of ZMO-MT may be ascribed to the replication of the morphology and structure of natural cotton. The high specific surface area is favorable to promote the redox reaction and thus to enhance battery performance.…”

Significantly enhanced electrochemical performance of a ZnCo2O4 anode in a carbonate based electrolyte with fluoroethylene carbonate

“…[8][9][10] TMOs with binary metal ions have in particular shown higher electrochemical performance than their single component counterparts because of their complex chemical composition and the synergic effects between multiple metal species. [11][12][13] As reported recently, ZnCo 2 O 4 could be used as promising anode materials for the LIBs due to its high reversible capacity, enhanced cycling stability, and environmental benignity. [14][15][16] Unfortunately, ZnCo 2 O 4 suffers from large volumetric variation during the repeated Li + insertion/extraction process, leading to the high mechanical stress and breakdown of the conductive network of the electrode material.…”