Self-polymerized hollow Mo-dopamine(PDA-Mo)spherical composites are appealing precursors for constructing robust N-doped carbon-encased Mo-containing electrode materials.Here,a method involving facile chemical precipi...Self-polymerized hollow Mo-dopamine(PDA-Mo)spherical composites are appealing precursors for constructing robust N-doped carbon-encased Mo-containing electrode materials.Here,a method involving facile chemical precipitation combined with vapor selenization processes has been developed to prepare three-dimensional(3D)hierarchical MoSe_(2)/N-doped carbon microsphere composites.The developed synthetic process eliminates the use of an expensive carbon matrix and toxic reagents,and the preliminary preparation of templates,and is deemed a facile,green,and cost-effective route to fabricate 3D hierarchical architectures.The as-synthesized hierarchical MoSe_(2)/N-doped carbon microsphere composites are constructed from sheet-like MoSe_(2)layers that are encased by amorphous N-doped carbon.As expected,the as-synthesized 3D hierarchical MoSe_(2)/N-doped carbon microsphere composites have excellent rate capacity(1500 and 600 mA h g^(-1)at 0.1 A g^(-1)and 10 A g^(-1),respectively)and long-life cycling stability(141.7 mA h g^(-1)remains even after 2000 cycles at 30 A g^(-1)).Besides,the as-synthesized hierarchical MoSe_(2)/N-doped carbon microsphere composites deliver a high capacity of about 570 mA h g^(-1)at 0.1 A g^(-1)when used as sodium-ion battery anode materials.Our work provides a successful approach for fabricating 3D hierarchical architectures applying simple synthetic methods,which could shed some light on future research pertaining to the construction of high-performance electrode materials.展开更多
基金supported by the National Natural Science Foundation of China(No.51672146)the Natural Science Foundation of Shandong Province(ZR2016EMM06)+2 种基金a Project of the Shandong Province Higher Educational Science and Technology Program(No.J15LA12)the Development Program in Science and Technology of Qingdao(No.15-9-1-65-jch)the Taishan Scholars Program of Shandong Province(No.ts201511034).
文摘Self-polymerized hollow Mo-dopamine(PDA-Mo)spherical composites are appealing precursors for constructing robust N-doped carbon-encased Mo-containing electrode materials.Here,a method involving facile chemical precipitation combined with vapor selenization processes has been developed to prepare three-dimensional(3D)hierarchical MoSe_(2)/N-doped carbon microsphere composites.The developed synthetic process eliminates the use of an expensive carbon matrix and toxic reagents,and the preliminary preparation of templates,and is deemed a facile,green,and cost-effective route to fabricate 3D hierarchical architectures.The as-synthesized hierarchical MoSe_(2)/N-doped carbon microsphere composites are constructed from sheet-like MoSe_(2)layers that are encased by amorphous N-doped carbon.As expected,the as-synthesized 3D hierarchical MoSe_(2)/N-doped carbon microsphere composites have excellent rate capacity(1500 and 600 mA h g^(-1)at 0.1 A g^(-1)and 10 A g^(-1),respectively)and long-life cycling stability(141.7 mA h g^(-1)remains even after 2000 cycles at 30 A g^(-1)).Besides,the as-synthesized hierarchical MoSe_(2)/N-doped carbon microsphere composites deliver a high capacity of about 570 mA h g^(-1)at 0.1 A g^(-1)when used as sodium-ion battery anode materials.Our work provides a successful approach for fabricating 3D hierarchical architectures applying simple synthetic methods,which could shed some light on future research pertaining to the construction of high-performance electrode materials.
