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Micro‐/Mesoporous Zinc–Manganese Oxide/Graphene Hybrids with High Specific Surface Area: A High‐Capacity, Superior‐Rate, and Ultralong‐Life Anode for Lithium Storage
Author(s) -
Yao Wei,
Zhao Mengqiang,
Dai Yi,
Tang Jiali,
Xu Jianguang
Publication year - 2017
Publication title -
chemelectrochem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.182
H-Index - 59
ISSN - 2196-0216
DOI - 10.1002/celc.201600564
Subject(s) - graphene , anode , materials science , mesoporous material , zinc , oxide , lithium (medication) , chemical engineering , manganese , specific surface area , nanotechnology , nanostructure , electrode , catalysis , metallurgy , chemistry , organic chemistry , medicine , endocrinology , engineering
Hierarchical porous mixed metal oxide/graphene two‐dimensional nanostructures, providing an extra active position for lithium storage, represent a hopeful platform for next‐generation anode materials. Herein, we report a facile approach to synthesize micro‐/mesoporous zinc–manganese oxide/graphene (Zn‐Mn‐O/G) hybrids with a specific surface area of 227.6 m 2 g −1 in a water/ethanol mixed solvent. Owing to the micro‐/mesoporous structure, large specific area, and strongly coupled effects between Zn‐Mn‐O and the graphene sheets, the hybrids deliver a high capacity of 1216 mAh g −1 at a current density of 500 mA g −1 after 100 cycles, a superior rate performance of 558 mAh g −1 at 8000 mA g −1 , as well as ultralong cycle life up to 900 cycles. In addition, if performed in the temperature range of 5 to 45 °C, the Zn‐Mn‐O/G anode demonstrates specific capacities between 748 and 1245 mAh g −1 after 100 cycles.