Yolk bishell Mn_xCo_{1- x}Fe₂O₄ hollow microspheres and their embedded form in carbon for highly reversible lithium storage

TY - JOUR

T1 - Yolk bishell MnxCo1- xFe2O4 hollow microspheres and their embedded form in carbon for highly reversible lithium storage

AU - Zhang, Zailei

AU - Ji, Yongjun

AU - Li, Jing

AU - Tan, Qiangqiang

AU - Zhong, Ziyi

AU - Su, Fabing

N1 - Publisher Copyright: © 2015 American Chemical Society.

PY - 2015/3/25

Y1 - 2015/3/25

N2 - The yolk-shell hollow structure of transition metal oxides has many applications in lithium-ion batteries and catalysis. However, it is still a big challenge to fabricate uniform hollow microspheres with the yolk bishell structure for mixed transition metal oxides and their supported or embedded forms in carbon microspheres with superior lithium storage properties. Here we report a new approach to the synthesis of manganese cobalt iron oxides/carbon (MnxCo1-xFe2O4 (0 ≤ x ≤ 1)) microspheres through carbonization of Mn2+Co2+Fe3+/carbonaceous microspheres in N2, which can be directly applied as high-performance anodes with a long cycle life for lithium storage. Furthermore, uniform hollow microspheres with a MnxCo1-xFe2O4 yolk bishell structure are obtained by annealing the above MnxCo1-xFe2O4/carbon microspheres in air. As demonstrated, these anodes exhibited a high reversible capacity of 498.3 mAh g-1 even after 500 cycles for Mn0.5Co0.5Fe2O4/carbon microspheres and 774.6 mAh g-1 over 100 cycles for Mn0.5Co0.5Fe2O4 yolk bishell hollow microspheres at the current density of 200 mA g-1. The present strategy not only develops a high-performance anode material with long cycle life for lithium-ion batteries but also demonstrates a novel and feasible technique for designed synthesis of transition metal oxides yolk bishell hollow microspheres with various applications.

AB - The yolk-shell hollow structure of transition metal oxides has many applications in lithium-ion batteries and catalysis. However, it is still a big challenge to fabricate uniform hollow microspheres with the yolk bishell structure for mixed transition metal oxides and their supported or embedded forms in carbon microspheres with superior lithium storage properties. Here we report a new approach to the synthesis of manganese cobalt iron oxides/carbon (MnxCo1-xFe2O4 (0 ≤ x ≤ 1)) microspheres through carbonization of Mn2+Co2+Fe3+/carbonaceous microspheres in N2, which can be directly applied as high-performance anodes with a long cycle life for lithium storage. Furthermore, uniform hollow microspheres with a MnxCo1-xFe2O4 yolk bishell structure are obtained by annealing the above MnxCo1-xFe2O4/carbon microspheres in air. As demonstrated, these anodes exhibited a high reversible capacity of 498.3 mAh g-1 even after 500 cycles for Mn0.5Co0.5Fe2O4/carbon microspheres and 774.6 mAh g-1 over 100 cycles for Mn0.5Co0.5Fe2O4 yolk bishell hollow microspheres at the current density of 200 mA g-1. The present strategy not only develops a high-performance anode material with long cycle life for lithium-ion batteries but also demonstrates a novel and feasible technique for designed synthesis of transition metal oxides yolk bishell hollow microspheres with various applications.

KW - anode

KW - hollow microspheres

KW - lithium-ion batteries

KW - manganese cobalt iron oxides

KW - yolk bishell

UR - http://www.scopus.com/inward/record.url?scp=84925799658&partnerID=8YFLogxK

U2 - 10.1021/acsami.5b00617

DO - 10.1021/acsami.5b00617

M3 - 文章

AN - SCOPUS:84925799658

SN - 1944-8244

VL - 7

SP - 6300

EP - 6309

JO - ACS applied materials & interfaces

JF - ACS applied materials & interfaces

IS - 11

ER -