Amorphous carbon layer contributing Li storage capacity to Nb₂O₅@C nanosheets

Abstract

In this work, amorphous carbon very thin layers coated on a Nb 2 O 5 nanosheet flexible composite have been successfully synthesized. The composite delivers a discharge capacity of 396 mA h g À1 after 100cycles at a current density of 100 mA g À1 , which is very much higher than for bare Nb 2 O 5 nanosheets.

Ultra‐Deep Oxidative Desulfurization of Model Oil Catalyzed by In Situ Carbon‐Supported Vanadium Oxides Using Cumene Hydroperoxide as Oxidant

“…[41] As shown in Figure 4(a) and Figure S3 (a-c), the O 1s is fitted into three peaks at 529.9 eV, 531.7 eV and 534.5 eV, which correspond to lattice oxygen, adsorbed oxygen and H 2 O, respectively. [42][43][44] It can be seen from Table S1, S2, the lattice oxygen contents enhance gradually which is consistent with the increase of vanadium pentoxide.…”

Controllable Formation of Niobium Nitride/Nitrogen-Doped Graphene Nanocomposites as Anode Materials for Lithium-Ion Capacitors

“…Niobium nitride (NbN) is a promising material for applications in capacitors because of its excellent chemical stability and electric conductivity . Though some investigations on the synthesis and applications of NbO x /carbon nanomaterials and partially nitrided TiNb 2 O 7 nanostructures as very promising anode electrodes for high‐power LIBs have been performed very recently, to the best of our knowledge, rare study on the synthesis of niobium nitride/nitrogen‐doped graphene (NbN/NG) hybrid materials has been reported so far. In this work, we presented a simple hydrothermal process followed by ammonia annealing for the preparation of a series of NbN/NG hybrid materials.…”

Oleic acid-treated synthesis of MnO@C with superior electrochemical properties

“…However, there are some limitations and deficiencies for graphite, i.e., its low electrochemical properties, poor rate performance and relatively low theoretical capacity of 372 mAh/g [5,6] . In the past one decade, the transitionmetal oxides have drawn considerable attention because of their high capacities, such as TiO 2 , SnO 2 , GeO 2 , Nb x O y , Fe x O y , Mn x O y [7][8][9][10][11][12][13][14][15][16][17] . Among them, Mn x O y (MnO 2 , Mn 3 O 4 , Mn 2 O 3 , MnO) has received special attention due to its high specific capacity, abundant resources, environmental friendliness, and cost-effectiveness [18] .…”