delta-MnO2 KMnF3 Composite with Mixed Valence as Cathode for Potassium Ion Battery

doi:10.1002/admi.201901362

	delta-MnO2 KMnF3 Composite with Mixed Valence as Cathode for Potassium Ion Battery
	Wang, Shuya; Cui, Yongli; Cui, Bin; Zhuang, Quanchao; Li, Bo; Zheng, Hong; Ju, Zhicheng
	2019-10-20
发表期刊	ADVANCED MATERIALS INTERFACES
ISSN	2196-7350
卷号	6 期号:24 页码:1901362
摘要	Potassium ion batteries (PIBs) are regarded as potentially promising large-scale energy storage systems. delta-MnO2/KMnF3-30 (mass percentage of KMnF3: 30%) with mixed valence of manganese is constructed by homogeneous precipitation method, as cathode for PIBs. As a buffer and chelating agent for the reaction, disodium ethylenediamine tetraacetate (EDTA-2Na) is helpful to form composites with good mixing and uniform dispersion. delta-MnO2 nanowires with different lengths can fully utilize the cross-linking of long nanowires and short-range filling of short nanowires, resulting in more stable network connectivity. Additionally, the uniform embedding of the KMnF3 nanoparticles among delta-MnO2 nanowires can effectively accommodate the volume expansion associated with ion intercalation during cycling process. delta-MnO2/KMnF3 combines the advantages of Mn-based fluoride and Mn-based oxide as cathode materials, and has high capacity, good cycle performance and rate performance. The capacity at a current density of 100 mA g(-1) after 200 cycles can still be as high as 90 mAh g(-1). Electrochemical impedance spectroscopy is used to study the reaction process of the delta-MnO2/KMnF3 cathode at the electrode/electrolyte interface and to explain some electrochemical phenomena.
DOI	10.1002/admi.201901362
引用统计
文献类型	期刊论文
条目标识符	http://ir.isl.ac.cn/handle/363002/34076
专题	盐湖资源综合利用工程技术中心中国科学院青海盐湖研究所
推荐引用方式 GB/T 7714	Wang, Shuya,Cui, Yongli,Cui, Bin,et al. delta-MnO2 KMnF3 Composite with Mixed Valence as Cathode for Potassium Ion Battery[J]. ADVANCED MATERIALS INTERFACES,2019,6(24):1901362.
APA	Wang, Shuya.,Cui, Yongli.,Cui, Bin.,Zhuang, Quanchao.,Li, Bo.,...&Ju, Zhicheng.(2019).delta-MnO2 KMnF3 Composite with Mixed Valence as Cathode for Potassium Ion Battery.ADVANCED MATERIALS INTERFACES,6(24),1901362.
MLA	Wang, Shuya,et al."delta-MnO2 KMnF3 Composite with Mixed Valence as Cathode for Potassium Ion Battery".ADVANCED MATERIALS INTERFACES 6.24(2019):1901362.

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