期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 768, 期 -, 页码 269-276出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2018.07.158
关键词
alpha-Ni(OH)(2); High-rate capability; Micron-bulks; Nanoparticles; High power; Ni-MH battery
资金
- Program of International S&T Cooperation of China [2016YFE0124500]
- National Natural Science Foundation of China [21603154]
- Sichuan Science and Technology Program [2017RZ0033]
The current main application of nickel-metal hydride (Ni-MH) batteries is offering high power assist for electric transportation, putting a high demand on the high-rate capability of the electrode materials. In this work, Co-free alpha-Ni(OH)(2) micron-bulks comprising ultrafine primary particles with average size of similar to 40 nm are presented as the high-rate cathode material for Ni-MH batteries. The micron-sized secondary particles are not only industry-compatible but also beneficial for tapping density, while the nano-sized primary particles ensure fast electrochemical kinetics. As a result, this material exhibits good overall performance, especially an excellent high-rate capability. When being discharged or charged at an ultrahigh current density up to 6000 mA g(-1), it can deliver a capacity of 245.1 mAh g(-1) (similar to 82% of the rated capacity) or accept a capacity of 272.6 mAh g(-1) (similar to 91% of the rated capacity) only within 3 min. When further operating in a more practical 'charge sustaining' mode, it also displays superior potential depolarization under high-current pulses. This impressive high-rate capability highlights the advantages of our sample, providing a promising candidate for the high-power Ni-MH batteries. (C) 2018 Elsevier B.V. All rights reserved.
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