期刊
ADVANCED SCIENCE
卷 7, 期 5, 页码 -出版社
WILEY
DOI: 10.1002/advs.201902547
关键词
hard carbon; low cost; N; O dual doping; potassium-ion batteries; sorghum stalks
资金
- National Natural Science Foundation of China [51671092, 51631004]
- Project of Talent Development in Jilin Province
- Fundamental Research Funds for the Central Universities
- Program for JLU Science and Technology Innovative Research Team [2017TD-09]
Potassium-ion batteries (PIBs) are considered as promising candidates for lithium-ion batteries due to the abundant reserve and lower cost of K resources. However, K+ exhibits a larger radius than that of Li+, which may impede the intercalation of K+ into the electrode, thus resulting in poor cycling stability of PIBs. Here, an N/O dual-doped hard carbon (NOHC) is constructed by carbonizing the renewable piths of sorghum stalks. As a PIB anode, NOHC presents a high reversible capacity (304.6 mAh g(-1) at 0.1 A g(-1) after 100 cycles) and superior cycling stability (189.5 mAh g(-1) at 1 A g(-1) after 5000 cycles). The impressive electrochemical performances can be ascribed to the super-stable porous structure, expanded interlayer space, and N/O dual-doping. More importantly, the NOHC can be prepared in large scale in a concise way, showing great potential for commercialization applications. This work may impel the development of low-cost and sustainable carbon-based materials for PIBs and other advanced energy storage devices.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据