SnO2/α-MoO3 core-shell nanobelts and their extraordinarily high reversible capacity as lithium-ion battery anodes

Abstract

Extraordinarily high reversible capacity of lithium-ion battery anodes is realized from SnO(2)/α-MoO(3) core-shell nanobelts. The reversible capacity is much higher than traditional theoretical results. Such behavior is attributed to α-MoO(3) that makes extra Li(2)O reversibly convert to Li(+).

HxMoO3@C nanobelts: Green synthesis and superior lithium storage properties

“…In our case, two possible factors may be ascribed to this unconventional phenomenon. On one hand, the Li y MoO 3 have converted into Mo in the equation (2), while the deconstruction of the H x MoO 3 nanobelts and emergence of lithiated amorphous Li x MoO 3 or Li yMoO 3 may lower the conductivity of the electrodes, which will synergistically affect the lithium storage and cause capacity fading at the early stage; on the other hand, the remaining unreacted active Mo would continually increase active sites as the lithium ion insertion, resulting in an increased capacity with the increasing number of cycles. For more details, it will be discussed in the future.…”

“…The carbon-coating process has proved to be an effective approach, as they provided simple process [4]. Other ideal strategies, such as fabricating graphene conducting layer on the surface of MoO 3 nanobelts, and using lithiation technologies et al were being continually reported in the last few years [1,2,4,5,8,9]. To date, how to increase the conductivity of the MoO 3 nanobelts without the assistance of graphene or metal, however, still remains a great challenge due to its intrinsic poor conductivity.…”

In-situ phase transition to form porous h-MoO3@C nanofibers with high stability for Li+/Na+ storage

“…The electrochemical performances of MoO 2 @C nanofibers and pure MoO 3 at 0.1 A g −1 are also provided in Figs S7, S8, showing the unsatisfactory stability and performances. On the contrary, the porous h-MoO 3 @C nanofiber can obtain better stability, even higher than relevant publication of MoO 3 for SIBs [42,57,61], the reasons for the performance of the porous h-MoO 3 @C nanofiber electrode for SIBs are summarized as follow: the rich porous structures could not only provide more electrochemical active sites and boost the lithiation/delithiation kinetics, but also facilitate the migration of Na + ; the oxygen-containing functional groups on surface form stable chemically bonded SEI films, further enhancing the cyclic stability [47].…”

High electrochemical performances of α-MoO 3 @MnO 2 core-shell nanorods as lithium-ion battery anodes

“…Ammonium heptamolybdate tetrahydrate ((NH 4 ) 6 a-MoO 3 @MnO 2 core-shell nanorods were synthesized by a two-step method. Firstly, a-MoO 3 nanorods were prepared using a hydrothermal method [11]. In a typical process, 1.0 g (NH 4 ) 6 Mo 7 O 24 Á 4H 2 O was first dissolved in 33 ml deionized water.…”

“…Therefore, new lithium storage anode materials with high capacity need to be explored. Recently, various metal oxide nanostructures have been widely investigated as LIBs anodes [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19]. Among these metal oxides materials, MoO 3 is an attractive anode material for LIBs.…”