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Defect regulation of heterogeneous nickel-based oxides via interfacial engineering for long-life lithium-oxygen batteries

Journal Article


Abstract


  • Interface engineering is crucial strategy for the sensible design and synthesis of high-efficiency electrocatalysts. However, the study on the effect of interfacial heterogeneity on the kinetics of oxygen electrode reactions in lithium-oxygen (Li-O2) batteries tends to be neglected, which restricts the development of excellent performance Li-O2 batteries. Here, a cactus-like nickel-cobalt oxide and nickel oxide heterostructure (NCO@NO) was successfully prepared and used for Li-O2 batteries as catalyst. The built-in electric field at the heterogeneous interface between NiO and NiCo2O4 can significantly enhance the interface charge transfer kinetics, and its unique cactus-like structure facilitates the exposure of abundant catalytic active sites. Due to the synergistic interaction between surface structure and heterogeneous interface, the NCO@NO based cathode exhibits a large discharge capacity of 17463.5 mA h g���1, an improved overpotential of 0.98 V, and an excellent long-term cycle stability (the terminal discharge voltage of the NCO@NO based Li-O2 battery shows negligible attenuation after cycling up to 500 times).

UOW Authors


  •   Shu, Chaozhu (external author)

Publication Date


  • 2019

Citation


  • Liang, R., Hu, A., Li, M., Ran, Z., Shu, C., & Long, J. (2019). Defect regulation of heterogeneous nickel-based oxides via interfacial engineering for long-life lithium-oxygen batteries. Electrochimica Acta, 321. doi:10.1016/j.electacta.2019.134716

Scopus Eid


  • 2-s2.0-85070867385

Volume


  • 321

Issue


Place Of Publication


Abstract


  • Interface engineering is crucial strategy for the sensible design and synthesis of high-efficiency electrocatalysts. However, the study on the effect of interfacial heterogeneity on the kinetics of oxygen electrode reactions in lithium-oxygen (Li-O2) batteries tends to be neglected, which restricts the development of excellent performance Li-O2 batteries. Here, a cactus-like nickel-cobalt oxide and nickel oxide heterostructure (NCO@NO) was successfully prepared and used for Li-O2 batteries as catalyst. The built-in electric field at the heterogeneous interface between NiO and NiCo2O4 can significantly enhance the interface charge transfer kinetics, and its unique cactus-like structure facilitates the exposure of abundant catalytic active sites. Due to the synergistic interaction between surface structure and heterogeneous interface, the NCO@NO based cathode exhibits a large discharge capacity of 17463.5 mA h g���1, an improved overpotential of 0.98 V, and an excellent long-term cycle stability (the terminal discharge voltage of the NCO@NO based Li-O2 battery shows negligible attenuation after cycling up to 500 times).

UOW Authors


  •   Shu, Chaozhu (external author)

Publication Date


  • 2019

Citation


  • Liang, R., Hu, A., Li, M., Ran, Z., Shu, C., & Long, J. (2019). Defect regulation of heterogeneous nickel-based oxides via interfacial engineering for long-life lithium-oxygen batteries. Electrochimica Acta, 321. doi:10.1016/j.electacta.2019.134716

Scopus Eid


  • 2-s2.0-85070867385

Volume


  • 321

Issue


Place Of Publication