Peapod-like CNT@V₂O₃ with Superior Electrochemical Performance as an Anode for Lithium-Ion Batteries

Abstract

Peapod-like CNT@V 2 O 3 (CNT = carbon nanotube) with small V 2 O 3 nanoparticles (13 nm) and a good electronic conductive network (the CNTs) was constructed through a reflux and annealing process. As anode materials, CNT@V 2 O 3 shows admirable capacity (652.4 mA h g −1 at 500 mA g −1 for 200 cycles), a long lifespan, and good rate performance. Compared with V 2 O 3 , the peapod-like CNT@ V 2 O 3 composites have superior electrochemical performance due to the porous structure, the V 2 O 3 particles, and peapodlike architecture, which reduce the transmission distance of lithium ion, enlarge the superficial area, and enhance structural stability. As a result, the unique composite material with a peapod-like structure is an ideal anode material.

Encapsulating V2O3 Nanoparticles in Carbon Nanofibers with Internal Void Spaces for a Self-Supported Anode Material in Superior Lithium-Ion Capacitors

“…Meanwhile, the elastic feature of carbonaceous materials can partly relieve the strain caused by the volumetric change of V 2 O 3 during Li + insertion/extraction process. The strategy has been demonstrated on the synthesis of V 2 O 3 nanoparticles attached on graphene, , V 2 O 3 /C core/shell composites, ,− , and hollow porous V 2 O 3 /C microspheres, , and so on. In most cases, V 2 O 3 /C composites and conductive agents were simply mixed with polymer binders, and then the mixture was coated on a current collector to obtain the electrodes.…”

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

“…Meanwhile, the cycling performance of CNT has been reported in our previous work. [ 13 ] The specific capacities of NV@C@CNT, V@C@CNT, NV@C, and NV@CNT are 895.6, 475.1, 259.7, and 645.3, respectively, all the samples showed excellent specific capacity. The specific capacity of NV@C@CNT is the highest among all composites under the same conditions, this demonstrated the importance of CNT (NV@C@CNT > NV@C), Ni (NV@C@CNT > V@C@CNT) and C (NV@C@CNT > NV@CNT) in the energy storage of NV@C@CNT, besides, the specific capacities of the pristine CNT much is lower than those of the composite under the same condition, it is inferred that this is due to the synergistic effect of the components.…”

“…[ 12 ] Compounding with highly conductive carbon materials is an effective way to solve the above problems. [ 13 ] Therefore, sugar‐coated haws stick‐like were designed using bamboo‐like carbon nanotube with a strong skeleton and carbon with good electrical conductivity to improve the electrochemical properties of the electrode. [ 14,15 ] Furthermore, the studies conducted that the transition metal nanoparticles like Ni not only improves electrical conductivity but also can work as electrochemical catalysts for the reversible formation/decomposition of some solid electrolyte interface (SEI) components and hence present a certain electrochemical capacity.…”

Facile Synthesis of Flock‐Like V2O3/C with Improved Electrochemical Performance as an Anode Material for Li‐Ion Batteries

“…For example, Bai et al fabricated peapod‐like nanowires composed of V 2 O 3 encapsulated with carbon nanotube. The superior surface properties and electrical conductivity of carbon nanotube bring an excellent electrochemical performance to the material . Liu et al prepared the composite of V 2 O 3 /carbon fiber by electrospinning method.…”