Improvement of the electrochemical properties of V3O7·H2O nanobelts for Li battery application through synthesis of V3O7@C core-shell nanostructured composites

Synthesis of V2O3/C composites with different morphologies by a facile route and phase transition properties of the compounds

“…4b). The peaks at 2950 -2850 cm −1 and 1048 cm −1 are the characteristic C-H stretches, which will facilitate the linkage of catalytic species or polymers to the surface in its potential applications [38,[42][43][44]. The peak at 980 cm −1 corresponds to the symmetric stretching of the ν s (V 3+ =O) bond [45], in agreement with the XRD observation.…”

“…Subsequently, V 2 O 3 /C composites were prepared at 700°C for 2 h under the Ar atmosphere. On one hand, it was reported that glucose can be carbonized to form carbon spheres [51] or amorphous carbon can be coated on the surface of metal oxides [42][43][44]. The carbonization step may arise from cross-linking induced by intermolecular dehydration of linear or branchlike oligosaccharides or other macromolecules [51].…”

VO2(B) conversion to VO2(A) and VO2(M) and their oxidation resistance and optical switching properties

“…Over the past decades, numerous efforts have been employed in vanadium oxides and their related compounds as functional materials because of their layered structures, unique chemical and physical properties, which make them highly desired in a wide range of promising potential applications such as catalysts, cathode materials for reversible lithium batteries, gas sensors, intelligent thermochromic windows, electrical and optical devices, laser shield and so on [1][2][3][4][5][6][7][8][9][10][11][12][13][14]. As is well known, vanadium has abundant oxidation states (0 to +5), which usually correspond to a variety of binary oxides with the general formula VO 2 + x (−0.5 x 0.5) [15,16], such as V 2 O 5 , VO 2 , V 2 O 3 , V 3 O 7 , V 4 O 9 , V 6 O 13 , etc.…”

High-energy cathode materials for Li-ion batteries: A review of recent developments

“…Organic carbon source, like citric acid, tartaric acid, ascorbic acid and so on are generally used as coating materials as well. Sarkar et al prepared nanorods of LiV 3 O 8 by using citrate assisted sol-gel method followed by room temperate quenching technique [171]. The composite with 30 wt% C exhibited excellent electrochemical properties with initial discharge capacity of 338 mAh g −1 at the current density of 101 mA g −1 , and superior cycling behavior.…”

“…As a typical multi-valence transition metal element, vanadium shows active chemical properties with various oxides and oxysalts, for example, VO 2 [154][155][156][157][158], V 2 O 5 [159][160][161][162][163][164][165], V 3 O 7 [167][168][169][170][171], V 4 O 9 [172,173], V 6 O 13 [174][175][176][177][178][179][180], Li 1+x V 3 O 8 [181][182][183][184][185][186][187][188], Li x VO 2 with layered structure [189191], Li x V 2 O 4 with spinel structure [192][193][194] and LiMVO 4 (M= Ni, Co) with inverse spinel structure [195][196][197][198][199]. Most of these compounds are lithium-intercalation materials, which refers to a good host for the reversible insertion and extraction of Li + [200][201][202].…”