期刊
NANO LETTERS
卷 17, 期 1, 页码 544-550出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.nanolett.6b04611
关键词
Interconnected nanowires; K-ion full batteries; Fe/Mn-based layered oxide; high-capacity; superior cycling stability; in situ X-ray diffraction
类别
资金
- National Key Research and Development Program of China [2016YFA0202603]
- National Basic Research Program of China [2013CB934103]
- Programme of Introducing Talents of Discipline to Universities [B17034]
- National Natural Science Foundation of China [51521001]
- National Natural Science Fund for Distinguished Young Scholars [51425204]
- Fundamental Research Funds for the Central Universities [WUT: 2016III001, 2016III004, 2015-III-021]
K-ion battery (KIB) is a new-type energy storage device that possesses potential advantages of low-cost and abundant resource of K precursor materials. However, the main challenge lies on the lack of stable materials to accommodate the intercalation of large-size K-ions. Here we designed and constructed a novel earth abundant Fe/Mn-based layered oxide interconnected nanowires as a cathode in KIBs for the first time, which exhibits both high capacity and good cycling stability. On the basis of advanced in situ X-ray diffraction analysis and electrochemical characterization, we confirm that interconnected K0.7Fe0.5Mn0.5O2 nanowires can provide stable framework structure, fast K-ion diffusion channels, and three-dimensional electron transport network during, the depotassiation/potassiation processes. As a result, a considerable initial discharge capacity of 178 mAh g(-1) is achieved when measured for KIBs. Besides, K-ion full batteries based on interconnected K0.7Fe0.5Mn0.5O2 nanowires/soft carbon are assembled, manifesting over 250 cycles with a capacity retention of similar to 76%. This work may open up the investigation of high-performance K-ion intercalated earth abundant layered cathodes and will push the development of energy storage systems.
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