期刊
JOURNAL OF COLLOID AND INTERFACE SCIENCE
卷 587, 期 -, 页码 693-702出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2020.11.029
关键词
Al doping; Hydroxide; Cathode; Ni-Zn battery; Cycle life
资金
- Zhejiang Provincial Natural Science Foundation of China [LY20E020004]
- China Postdoctoral Science Foundation [2019M662044]
- Fundamental Research Funds for the Provincial Universities of Zhejiang [2020YQ005]
- Zhejiang Provincial Key Research and Development Project [2019C02037]
- National Natural Science Foundation of China [31870548, 51703203]
- 151 Talent Project of Zhejiang Province
To address the unsatisfactory cycle life of nickel-zinc batteries, researchers developed a facile process to prepare aluminum-doped cobalt-nickel double hydroxides on a carbon cloth. This new electrode material exhibited improved cycling stability and led to a more than 14% increase in cycle life of the as-constructed Ni-Zn battery, which also demonstrated high specific capacity, good rate capability, and superior fast-charging ability.
The unsatisfactory cycle life of nickel-based cathodes hinders the widespread commercial usage of nickel-zinc (Ni-Zn) batteries. The most frequently used methods to improve the cycle life of Ni-based cathodes are usually complicated and/or involve using organic solvents and high energy consumption. A facile process based on the hydrolysis-induced exchange of the cobalt-based metal-organic framework (Co-MOF) was developed to prepare aluminum (Al)-doped cobalt-nickel double hydroxides (Al-CoNiDH) on a carbon cloth (CC). The entire synthesis process is highly efficient, energy-saving, and has a low negative impact on the environment. Compared to undoped cobalt-nickel double hydroxide (Al-CoNiDH-0%), the as-prepared Al-CoNiDH as the electrode material displays a remarkably improved cycling stability because the Al-doping successfully depresses the transition in the crystal phase and microstructure during the long cycling. Benefiting from the improved performance of the optimal Al-CoNiDH electrode (AlCoNiDH-5% electrode), the as-constructed aqueous Ni-Zn battery with Al-CoNiDH-5% as the cathode (AlCoNiDH-5%//Zn) displays more than 14% improvement in the cycle life relative to the Al-CoNiDH-0%//Zn battery. Moreover, this Al-CoNiDH-5%//Zn battery achieves a high specific capacity (264 mAh g(-1)), good rate capability (72.4% retention at a 30-fold higher current), high electrochemical energy conversion efficiency, superior fast-charging ability, and strong capability of reversible switching between fast charging and slow charging. Furthermore, the as-assembled quasi-solid-state Al-CoNiDH-5%//Zn battery exhibits a decent electrochemical performance and satisfactory flexibility. (C) 2020 Elsevier Inc. 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