TY - JOUR
T1 - Coaxial-cable hierarchical tubular MnO 2 @Fe 3 O 4 @C heterostructures as advanced anodes for lithium-ion batteries
AU - Li, Desheng
AU - Zhang, Yu
AU - Rui, Kun
AU - Lin, Huijuan
AU - Yan, Yan
AU - Wang, Xiaoshan
AU - Zhang, Chao
AU - Huang, Xiao
AU - Zhu, Jixin
AU - Huang, Wei
N1 - Publisher Copyright:
© 2019 IOP Publishing Ltd.
PY - 2019/1/4
Y1 - 2019/1/4
N2 - Nanostructured manganese oxides have been regarded as promising anodes for lithium-ion batteries (LIBs) due to their high specific capacity, environmental friendliness and low cost. However, as conversion-type electrodes, their scalable utilization is hindered by intrinsically low reaction kinetics, large volume variation and high polarization. Herein, a coaxial-cable tubular heterostructure composed of a hollow carbon skeleton, Fe 3 O 4 nanoparticles and ultrathin MnO 2 nanosheets from inside out, donated as MnO 2 @Fe 3 O 4 @C, is synthesized via a facile two-step hydrothermal process. The unique design integrates conductive carbon and nanostructured MnO 2 and Fe 3 O 4 into a one-dimensional (1D) hierarchically open architecture, which provides abundant electrode-electrolyte contact areas, favorable heterointerfaces and ultrafast electron/ion pathways. Benefiting from these features, the MnO 2 @Fe 3 O 4 @C anode exhibits a high reversible capacity of 946 mAh g -1 at 200 mA g -1 after 160 cycles, and excellent cyclability with a specific capacity of 845 mAh g -1 at 500 mA g -1 after 600 cycles. This work might provide an insightful guideline for the design of novel electrode materials.
AB - Nanostructured manganese oxides have been regarded as promising anodes for lithium-ion batteries (LIBs) due to their high specific capacity, environmental friendliness and low cost. However, as conversion-type electrodes, their scalable utilization is hindered by intrinsically low reaction kinetics, large volume variation and high polarization. Herein, a coaxial-cable tubular heterostructure composed of a hollow carbon skeleton, Fe 3 O 4 nanoparticles and ultrathin MnO 2 nanosheets from inside out, donated as MnO 2 @Fe 3 O 4 @C, is synthesized via a facile two-step hydrothermal process. The unique design integrates conductive carbon and nanostructured MnO 2 and Fe 3 O 4 into a one-dimensional (1D) hierarchically open architecture, which provides abundant electrode-electrolyte contact areas, favorable heterointerfaces and ultrafast electron/ion pathways. Benefiting from these features, the MnO 2 @Fe 3 O 4 @C anode exhibits a high reversible capacity of 946 mAh g -1 at 200 mA g -1 after 160 cycles, and excellent cyclability with a specific capacity of 845 mAh g -1 at 500 mA g -1 after 600 cycles. This work might provide an insightful guideline for the design of novel electrode materials.
KW - MnO
KW - anode
KW - electrochemical performance
KW - lithium-ion batteries
UR - http://www.scopus.com/inward/record.url?scp=85059828587&partnerID=8YFLogxK
U2 - 10.1088/1361-6528/aaf7c5
DO - 10.1088/1361-6528/aaf7c5
M3 - 文章
C2 - 30537692
AN - SCOPUS:85059828587
SN - 0957-4484
VL - 30
JO - Nanotechnology
JF - Nanotechnology
IS - 9
M1 - 094002
ER -
