Synthesis of V 2 O 5 /Single-Walled Carbon Nanotubes Integrated into Nanostructured Composites as Cathode Materials in High Performance Lithium-Ion Batteries

Nojan Aliahmad, Pias Kumar Biswas, Hamid Dalir and Mangilal Agarwal
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Nojan Aliahmad: Integrated Nanosystems Development Institute (INDI), Indiana University-Purdue University Indianapolis, Indianapolis, IN 46202, USA
Pias Kumar Biswas: Integrated Nanosystems Development Institute (INDI), Indiana University-Purdue University Indianapolis, Indianapolis, IN 46202, USA
Hamid Dalir: Integrated Nanosystems Development Institute (INDI), Indiana University-Purdue University Indianapolis, Indianapolis, IN 46202, USA
Mangilal Agarwal: Integrated Nanosystems Development Institute (INDI), Indiana University-Purdue University Indianapolis, Indianapolis, IN 46202, USA

Energies, 2022, vol. 15, issue 2, 1-16

Abstract: Vanadium pentoxide (V 2 O 5 )-anchored single-walled carbon nanotube (SWCNT) composites have been developed through a simple sol–gel process, followed by hydrothermal treatment. The resulting material is suitable for use in flexible ultra-high capacity electrode applications for lithium-ion batteries. The unique combination of V 2 O 5 with 0.2 wt.% of SWCNT offers a highly conductive three-dimensional network. This ultimately alleviates the low lithium-ion intercalation seen in V 2 O 5 itself and facilitates vanadium redox reactions. The integration of SWCNTs into the layered structure of V 2 O 5 leads to a high specific capacity of 390 mAhg −1 at 0.1 C between 1.8 to 3.8 V, which is close to the theoretical capacity of V 2 O 5 (443 mAhg −1 ). In recent research, most of the V 2 O 5 with carbonaceous materials shows higher specific capacity but limited cyclability and poor rate capability. In this work, good cyclability with only 0.3% per cycle degradation during 200 cycles and enhanced rate capability of 178 mAhg −1 at 10 C have been achieved. The excellent electrochemical kinetics during lithiation/delithiation is attributed to the chemical interaction of SWCNTs entrapped between layers of the V 2 O 5 nanostructured network. Proper dispersion of SWCNTs into the V 2 O 5 structure, and its resulting effects, have been validated by SEM, TEM, XPS, XRD, and electrical resistivity measurements. This innovative hybrid material offers a new direction for the large-scale production of high-performance cathode materials for advanced flexible and structural battery applications.

Keywords: vanadium pentoxide; carbon nanotubes; lithium-ion batteries; nanocomposite materials; xerogel; hybrid cathodes (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
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