期刊
NANOTECHNOLOGY
卷 32, 期 37, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/1361-6528/ac08bb
关键词
ZnO; porous nanobelt array; Zn substrate; lithium-ion battery; binder-free anode
资金
- Sichuan Science and Technology Program [2018GZ0463]
- Program for New Century Excellent Talents in University [NCET100605]
- National Natural Science Foundation of China [52072251]
In this study, a novel self-supporting porous ZnO nanobelt array was successfully synthesized, exhibiting excellent performance, especially at low temperatures, in lithium-ion batteries, showing great potential for practical application.
ZnO is considered to be one of the promising anode materials for lithium-ion batteries (LIBs), but the poor electronic conductivity and large volume variation during lithium-ion extraction and insertion process of ZnO seriously hinders its commercial application in LIBs. In this study, we synthesized a novel self-supporting porous ZnO nanobelt (PZB) arrays on Zn foils, in which Zn foils can be directly used as current collectors to promote electrically connection between the active materials and the current collectors. Furthermore, the well-aligned ZnO nanobelts have a thin thickness and uniform porous structure, which endue it well improved electrochemical performance. The PZB anodes display a high areal capacity of 5.91 mAh cm(-2) at current density of 0.5 mA cm(-2) at room temperature, and deliver an areal capacity of 1.73 mAh cm(-2) at -20 degrees C, indicating its excellent application potential especially at low temperatures, and it makes the porous ZnO nanobelts a practical anode material for LIBs.
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