期刊
MATERIALS RESEARCH BULLETIN
卷 107, 期 -, 页码 468-476出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.materresbull.2018.08.019
关键词
Mesoporous; Inter-connected structure; ZnMn2O4 nano-peanuts; Lithium storage
资金
- National Natural Science Foundation of China [10974105, 21701095]
- Natural Science Foundation of Shandong Province, China [ZR2017BEM007]
- China Postdoctoral Science Foundation [2017M622131]
- Program of Science and Technology for Higher Education in Shandong Province, China [J17KA010]
- Recruitment Program of High-end Foreign Experts [GDW20163500110, GDW20173500154]
- Top-notch Innovative Talent Program of Qingdao City [13-CX-08]
- Taishan Scholar Program of Shandong Province
- Qingdao International Center for Semiconductor Photoelectric Nanomaterials
- Shandong Provincial University Key Laboratory of Optoelectrical Material Physics and Devices
The ZnMn2O4 nano-peanuts with diameters of 16-25 nm have been successfully prepared through a simple one-step surfactant-assisted solvothermal process. The as-synthesized ZnMn2O4 exhibits novel interconnected mesoporous hierarchical architecture, which possesses three advantages: special mesoporous structure, high specific surface and interconnected walls. On one hand, the interconnected structure can provide sufficient surface reaction sites to fully contact Li+ with the electrolyte and improve Li+ diffusion and electron transfer; On the other hand, the mesoporous hierarchical networks can buffer the volume change, accommodate or alleviate the strain during charge-discharge process, thus enhancing the conductivity and stability of the electrodes. Benefiting from the mesoporous design, the interconnected ZnMn2O4 delivers a stable capacity (812 mA h g(-1) at 100 mA g(-1) after 200 cycles), and maintains a high capacity of 516 mA h g(-1) even at 2 A g(-1) after 200 cycles, which is more stable than others' rapid declines after cycles.
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