Three-dimensional honeycomb-like networks of birnessite manganese oxide assembled by ultrathin two-dimensional nanosheets with enhanced Li-ion battery performances

被引:21
作者
Dang, Liyun [1 ]
Wei, Chengzhen [2 ]
Ma, Haifeng [1 ]
Lu, Qingyi [1 ]
Gao, Feng [2 ]
机构
[1] Nanjing Univ, Collaborat Innovat Ctr Adv Microstruct, State Key Lab Coordinat Chem, Sch Chem & Chem Engn,Nanjing Natl Lab Microstruct, Nanjing 210093, Jiangsu, Peoples R China
[2] Nanjing Univ, Collaborat Innovat Ctr Adv Microstruct, Dept Mat Sci & Engn, Nanjing 210093, Jiangsu, Peoples R China
基金
中国国家自然科学基金;
关键词
ANODE MATERIALS; HIGH-ENERGY; GRAPHENE; SUPERCAPACITOR; MOS2; DEGRADATION; FRAMEWORKS; DESIGN; GROWTH; TIO2;
D O I
10.1039/c5nr00576k
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Three-dimensional (3D) honeycomb-like birnessite networks composed of ultrathin two-dimensional (2D) nanosheets were firstly synthesized through a facile and low-cost synthetic route. By using carbon microspheres as a template instead of graphene, hierarchical birnessite structures assembled by ultrathin nanosheets including york-shell and hollow structures were obtained besides the ultrathin birnessite nanosheets with a thickness of about 0.7 nm. By assembling carbon spheres into an ordered 3D array, novel 3D honeycomb-like birnessite structures assembled by ultrathin nanosheets were firstly prepared. When evaluated as an anode material for Li-ion batteries, the 3D honeycomb-like networks show enhanced electrochemical performances with high capacities, excellent cycling stability and good rate capability, which can be ascribed to the novel 3D honeycomb-like macroporous structure with a 3D inverse opal structure, well-ordered macropores, interconnected walls and a regular periodicity.
引用
收藏
页码:8101 / 8109
页数:9
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