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A Novel Co 3 O 4 /MnO 2 /C Electrode with Hierarchical Heterostructure for High‐performance Lithium‐Ion Batteries
Author(s) -
Xu Ying,
Ye Xiongbiao,
Qiu Yiwei,
Gan Chuanhai,
Huang Liuqing,
Tang Xueyuan,
Luo Xuetao
Publication year - 2020
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.202003656
Subject(s) - anode , materials science , lithium (medication) , current density , heterojunction , transition metal , hydrothermal circulation , electrode , composite number , chemical engineering , electrochemistry , nanotechnology , optoelectronics , catalysis , composite material , chemistry , medicine , biochemistry , physics , quantum mechanics , engineering , endocrinology
Transition metal oxides (TMOs) are promising materials for next‐generation lithium‐ion batteries while the lithium storage and cycling stability of TMOs are still limited. Herein, a novel Co 3 O 4 /MnO 2 /C composite using metal‐organic frameworks (MOFs) as sacrificial templates is reported. MnO 2 and C shells are layer by layer coated on the MOF‐derived Co 3 O 4 /C samples via hydrothermal technique and heat treatment. When employed as anode materials for LIBs, the hierarchically heterostructured Co 3 O 4 /MnO 2 /C composites incorporate the merits of Co 3 O 4 , MnO 2 , and C, showing high Li storage performances at a current density of 0.2 A g −1 with an initial capacity of ∼1245.7 mAh g −1 and a reversible capacity of ∼854.9 mAh g −1 after 100 cycles, remarkable cycling stability, and excellent rate capability (almost 98 % recovery as the current density returns to the initial 0.2 A g −1 , and especially, the specific capacity remains ∼587.6 mAh g −1 at a high current density of 2.0 A g −1 ).