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Zhu, Shan; Li, Jiajun; Deng, Xiaoyang; He, Chunnian; Liu, Enzuo; He, Fang; Shi, Chunsheng; Zhao, Naiqin
Advanced functional materials, March 3, 2017, Volume: 27, Issue: 9Journal Article
A general ultrathin‐nanosheet‐induced strategy for producing a 3D mesoporous network of Co3O4 is reported. The fabrication process introduces a 3D N‐doped carbon network to adsorb metal cobalt ions via dipping process. Then, this carbon matrix serves as the sacrificed template, whose N‐doping effect and ultrathin nanosheet features play critical roles for controlling the formation of Co3O4 networks. The obtained material exhibits a 3D interconnected architecture with large specific surface area and abundant mesopores, which is constructed by nanoparticles. Merited by the optimized structure in three length scales of nanoparticles–mesopores–networks, this Co3O4 nanostructure possesses superior performance as a LIB anode: high capacity (1033 mAh g−1 at 0.1 A g−1) and long‐life stability (700 cycles at 5 A g−1). Moreover, this strategy is verified to be effective for producing other transition metal oxides, including Fe2O3, ZnO, Mn3O4, NiCo2O4, and CoFe2O4. A general ultrathin‐nanosheet‐induced strategy is introduced for producing 3D mesoporous network of transition metal oxides (TMOs). An N‐doped carbon network serves as the sacrificed template, which can be applied to many kinds of TMOs. The obtained material exhibits an interconnected mesopore architecture and possesses superior performance as a lithium ion anode.
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