4 years ago

Hierarchical Porous Intercalation-Type V2O3 as High-Performance Anode Materials for Li-Ion Batteries

Hierarchical Porous Intercalation-Type V2O3 as High-Performance Anode Materials for Li-Ion Batteries
Kongjun Zhu, Yuan Xu, Jing Wang, Guo‘an Tai, Pengcheng Liu, Kan Bian, Li Lu, Yanfeng Gao, Hongjie Luo, Jinsong Liu
As intercalation-type anode materials for Li-ion batteries (LIBs), the commercially used graphite and Li4Ti5O12 exhibit good cycling and rate properties, but their theoretical specific capacities are too low to meet the ever-growing demands of high-energy applications such as electric vehicles. Therefore, the development of new intercalation-type anode materials with larger capacity is very desirable. Herein, we design and synthesize novel 3 D hierarchical porous V2O3@C micro/nanostructures consisting of crumpled nanosheets, through self-reduction under annealing from the structurally similar VO2 (B)@C precursors without the addition of any other reducing reagent or gas. Excitingly, it is found for the first time through ex situ XRD technology that V2O3 is a new, promising intercalation-type anode material for LIBs with a high capacity. V2O3@C micro/nanostructures can deliver a large capacity of 732 mAh g−1 without capacity loss at 100 mA g−1 even after 136 cycles, as well as exhibiting excellent cycling and rate performances. The application of V2O3 for Na-ion batteries (NIBs) is elaborated for the first time, and excitingly, it is found that V2O3@C micro/nanostructures may be promising anode materials for NIBs. Advantageous anodes: It is found that V2O3 may be a promising intercalation-type anode material for Li-ion batteries. A hierarchical porous V2O3 micro/nanostructure is synthesized through self-reduction (see figure), which exhibits excellent electrochemical performance for both Li-ion and Na-ion batteries.

Publisher URL: http://onlinelibrary.wiley.com/resolve/doi

DOI: 10.1002/chem.201700369

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