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Yolk‐Shell Structured C/Mn 3 O 4 Microspheres Derived from Metal–Organic Frameworks with Enhanced Lithium Storage Performance
Author(s) -
Xu Ying,
Qiu Yiwei,
Zhang Chengkun,
Gan Chuanhai,
Huang Liuqing,
Tang Xueyuan,
Luo Xuetao
Publication year - 2020
Publication title -
energy technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.91
H-Index - 44
eISSN - 2194-4296
pISSN - 2194-4288
DOI - 10.1002/ente.202000376
Subject(s) - materials science , anode , composite number , mesoporous material , lithium (medication) , chemical engineering , metal organic framework , carbon fibers , conductivity , energy storage , template method pattern , nanotechnology , electrode , adsorption , composite material , chemistry , catalysis , organic chemistry , engineering , medicine , power (physics) , physics , quantum mechanics , endocrinology
To solve the problem associated with the huge volume change and low conductivity of Mn 3 O 4 , a novel C/Mn 3 O 4 microsphere with Mn 3 O 4 layer and void space sandwiched by nitrogen‐doped carbon (NC) is designed and fabricated. In this composite, the NC is obtained from the metal–organic frameworks (MOFs) and polydopamine (PDA). The preparation process is facile and effective without additional templates or redox solvents introduced. When used as anodes for lithium‐ion batteries (LIBs), the C/Mn 3 O 4 composite incorporates the metrics of N‐doping, yolk‐shell structure, double carbon layer, mesoporous Mn 3 O 4 , showing an outstanding lithium storage of ≈1015.9 mAh g −1 at 0.2 A g −1 in the 250th cycle, high cycling stability (without clear capacity decay after 400 cycles), and excellent rate capability (capacity can fully recover as the current density returns back to the initial value of 0.2 A g −1 ). The yolk‐shell structure derived from MOFs can be expanded to fabricate other materials with improved performance.