Large-Scale Production of V₆O₁₃ Cathode Materials Assisted by Thermal Gravimetric Analysis–Infrared Spectroscopy Technology

Abstract

The kilogram-scale fabrication of VO cathode materials has been notably assisted by in situ thermal gravimetric analysis (TGA)-infrared spectroscopy (IR) technology. This technology successfully identified a residue of ammonium metavanadate in commercial VO, which is consistent with the X-ray photoelectron spectroscopy result. Samples of VO materials have been fabricated and characterized by TGA-IR, scanning electron microscopy, and X-ray diffraction. The initial testing results at 125 °C have shown that test cells containing the sample prepared at 500 °C show up to a 10% increase in the initial specific capacity in comparison with commercial VO.

Citric Acid Assisted Solid State Synthesis of V2O3, V2O3/C and V2O3/Graphene Composites for Li‐ion Battery Anode Applications

“…Nonetheless, simple solid-state heat treatment of NH 4 VO 3 under inert atmosphere resulted in V 6 O 13 . [9] The peak at about 26°in Figure 4 from (e) to (h) corresponds to rGO, confirming that it was present in the V 2 O 3 /G composite samples. The intensity of rGO peak continuously decreased and finally became feeble at 0.5 M of CA.…”

“…Adding CA/rGO to the reaction solution inhibits the polyvanadate chain formation and maintains lower oxidation states of vanadium. Nonetheless, simple solid‐state heat treatment of NH 4 VO 3 under inert atmosphere resulted in V 6 O 13 . The peak at about 26° in Figure from (e) to (h) corresponds to rGO, confirming that it was present in the V 2 O 3 /G composite samples.…”

“…However, the synthesis processes were complex, and these studies did not discuss the effect of particle size on the electrochemical performance of LIBs. The first objective of this project is to synthesize V 2 O 3 , V 2 O 3 /C and V 2 O 3 /G composites by using citric acid (CA) as a particle (polyvanadate) inhibitor, and source of carbonization. The second objective is to investigate if the synthesis approach, crystallinity and particle size would affect the electrochemical performance of V 2 O 3 in an anode application of LIBs.…”

Recent Progress in the Applications of Vanadium‐Based Oxides on Energy Storage: from Low‐Dimensional Nanomaterials Synthesis to 3D Micro/Nano‐Structures and Free‐Standing Electrodes Fabrication

“…Moreover, V 6 O 13 can electrochemically incorporate up to 8 Li per formula unit, which results in a high theoretical specific capacity of 417 mA h g −1 (8 Li + intercalation). [74,[117][118][119][120][121][122][123][124] For example, Zhou and his co-workers synthesized a V 6 O 13 nanostructure from hydrated aerogel. [74,[117][118][119][120][121][122][123][124] For example, Zhou and his co-workers synthesized a V 6 O 13 nanostructure from hydrated aerogel.…”

“…Moreover, V 6 O 13 can electrochemically incorporate up to 8 Li per formula unit, which results in a high theoretical specific capacity of 417 mA h g −1 (8 Li + intercalation) . So, many V 6 O 13 nanomaterials were synthesized as the cathode materials of LIBs . For example, Zhou and his co‐workers synthesized a V 6 O 13 nanostructure from hydrated aerogel .…”