Electrolytic molybdenum oxides in lithium batteries

Study of carbonization behavior of polyacrylonitrile/tin salt as anode material for lithium‐ion batteries

“…The large initial capacity loss of the Sn@C fiber electrode is partly attributed to the formation of an SEI layer. [39][40][41] Figures 7 and 8 present the electrochemical performances of Sn1Pan1 and Sn2Pan3 with lower tin content. In comparison, the samples of Sn3Pan2_700, Sn1Pan1_700, and Sn2Pan3_700 carbonized at 700 8C deliver initial discharge capacities of 929.2, 1329.8, and 1137.0 mAh g 21 , respectively.…”

“…In the subsequent charge process, the charge capacities are 473.5, 808.6, and 720.2 mAh g 21 in Sn1Pan1_500, Sn1Pan1_700, and Sn1Pan1_800, respectively. 42,43 the reversible capacities of tin were soon decreased if the Sn particles were aggregated during lithiation/ delithiation processes. The as-synthesized Sn@C composites have the advantage that the aggregations of metal or metal oxide enwrapped in carbon fibers are weakened during the charging and discharging processes.…”

“…First, the carbon fibers provide a higher specific surface area, good electrical contact, and good lithium ion conductivity; second, the adequate void space (as a "buffer zone") in the carbon fibers flexibly accommodates the large volume change in the lithiation and delithiation processes. 39,41 The relatively separated tin nanoparticles inside the carbon fibers retarded the aggregation during the Li alloying accompanying the volume change, leading to good cycle performance. Figure 10 shows the TEM images of the as-synthesized samples Sn1Pan1 and the sketch of the microstructure of tin-containing nanoparticles wrapped in carbon fibers before and after discharge.…”

Fluorine substituted molybdenum oxide as cathode material for Li-ion battery

“…Two types of vacant sites (intralayers and interlayers) are available in MoO 3 crystal structure for hosting foreign ions like lithium [7,8]. The theoretical capacity of molybdenum oxide vs. Li + /Li reaches C = 1117 mAh g -1 , the volume change during Li + intercalation-deintercalation is calculated to be as much as 104% [9,10]. However, slow solid-state diffusion of Li + as well as low conductivity decrease the reversible capacity of MoO 3 [11][12][13].…”

Diffuse light‐scattering properties of nanocracked and porous MoO3 films self‐formed by electrodeposition and thermal annealing

“…Meanwhile, the molybdenum oxides have been one of the promising materials for wide application fields such as electrochromic devices, battery electrodes, catalysis, and gas sensors due to their particular structural and optical properties 12–16. Among various methods, good crystallized and stable molybdenum dioxide (MoO 2 ) or molybdenum trioxide (MoO 3 ) could be obtained by performing the electrodeposition and thermal annealing that are fast, simple, and cost‐effective processes 17.…”