One‐dimensional bunched Ni‐V2O3@C@CNT for superior performance lithium‐ion batteries and hybrid capacitors

Abstract

Abstract In this paper, by using the bamboo‐like carbon nanotubes (BCNTs) from sulfonated polymer nanotubes (SPNTs), the 3D porous sugar‐coated haws stick‐like composites decorated with V2O3 and Ni nanoparticles (NV@C@CNT) have been prepared via a facile solution method and subsequent annealing reactions. The porous carbon matrix derived from the SPNTs provides a continuous highly conductive network to facilitate the fast charge transfer and form a stable solid electrolyte interface film. This engineering protocol toward electrode architectures/configurations endows integrated NV@C@CNT anodes with large specific capacity (895.6 mAh g–1 at 0.2 A g–1 after 100 cycles), good operation stability, excellent rate capabilities, and prolonged cyclic life span. To prove their potential real applications, we have established the NV@C@CNT//FCNT lithium ion capacitors (LICs), which is capable of showing high energy densities, power densities, and long cycle stability. This work provides a scalable, simple, and efficient evolutionary method for the production of NV@C@CNT electrode materials, providing useful inspiration and guidance for the anodic applications of metal oxides in next‐generation power sources.

Keywords

• CNT
• Energy densities
• Li‐ion capacitors
• Ni‐V2O3
• Sandwich‐like