Uniform Fe3O4 microflowers hierarchical structures assembled with porous nanoplates as superior anode materials for lithium-ion batteries

Abstract

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Reduced graphene oxide/iron oxide hybrid composite material as an efficient magnetically separable heterogeneous catalyst for transfer hydrogenation of ketones

“…The XPS spectra for C 1s (Figure b) and O 1s (Figure c) are also shown. For O 1s, a peak at binding energy of 530.33 eV is observed which is the typical state of Fe─O corresponding to Fe 3 O 4 …”

Synthesis and properties of nanoparticles based on С/Fe3O4, С/Fe3-xCrxO4, С/Li0.5Fe1.5CrO4 – anode materials for lithium-ion batteries

“…5) have been reduced to Есh ~ 0.9 V with retaining its capacity during cycling at the level of 600 mAh/g. The obtained result allows to hope that the optimization of the conditions for the synthesis of the material C/LiFe3-xCrxO4, in particular the formation of effective morphology, as found in [6][7] for C/Fe3O4, will make it possible to approximate such anode to graphite at specific power with retaining its charging capacity.…”

In Situ Synthesis of ZnO/Porous Carbon Microspheres and Their High Performance for Lithium‐Ion Batteries

“…Secondly, the porous carbon framework acts as a buffer layer in the in situ synthesized composite structure, which could effectively avoid the structural damage caused by ZnO direct contact and accommodate huge volume changes during the discharge–charge process . Thirdly, the porous carbon microspheres are self‐assembled from individual nanosheets and the spherical morphology and structure would extremely reduce solid‐state transport lengths for Li + diffusion and further improve cycling stability . Therefore, the ZnO/porous carbon microspheres with the in situ synthesized composite structure could exhibit good electrochemical performances including cyclic and rate properties.…”

“…For instance, Pan et al revealed that ZnO‐NiO‐C films with a flower‐like structure exhibited a reversible capacity greater than 485 mAh g −1 , implying that the lithium storage capacity could be dramatically improved through controlling both architecture and composition. Taking advantages of the structural feature, sea‐urchin‐like cobalt oxide, uniform Fe 3 O 4 microflowers and flower‐like cobalt oxide had been utilized as the advanced electrode in energy storage devices as well. Therefore, ZnO/porous carbon microspheres with the self‐assembled structure would have the higher application value than ZnO/C composite materials.…”