Nanostructured V_2O_5-SWCNTs Based Lithium-ion Battery for Multifunctional Energy Storage Composites: Materials Synthesis and Fabrication

摘要

Exponential advancement in the automotive and aerospace industry promotes the need for multifunctional energy storage composites to minimize the dependence on fossil fuel and reduce structural weight. Vanadium pentoxide (V_2O_5)/single-walled carbon nanotubes (SWCNT) based cathode materials have been synthesized to be incorporated in ultrathin lithium-ion battery followed by integration into composite structure with interlocking system. While the conventional cathode materials can provide the desired cyclability and high energy density for structural energy storage device, theoretical capacity of theirs is still not adequate to meet up the needs of new age structural devices and high-power applications. In order to reach a higher specific capacity/energy, new ultra-high capacity electrode materials are required. In this paper, vanadium pentoxides have been investigated owing to their multi-valence transition throughout the charging-discharging phase, which provides high capacities. Furthermore, vanadium is an accessible, low-cost, and abundant in nature. Through a simple fabrication processes, the sol-gel of this material can be utilized as an active cathode material for high performance lithium ion batteries as it produces a 3D crystal structure that offers nests for lithium ions.