Intrinsic Pseudocapacitive Affinity in Manganese Spinel Ferrite Nanospheres for High-Performance Selective Capacitive Removal of Ca2+ and Mg2+

doi:10.1021/acsami.1c09996

	Intrinsic Pseudocapacitive Affinity in Manganese Spinel Ferrite Nanospheres for High-Performance Selective Capacitive Removal of Ca2+ and Mg2+
	Xu, Yingsheng 1,2; Xiang, Shuhong 1,2; Zhou, Hongjian 1; Wang, Guozhong 1; Zhang, Haimin 1; Zhao, Huijun 1,3
刊名	ACS APPLIED MATERIALS & INTERFACES
	2021-08-18
卷号	13
关键词	hybrid capacitive deionization MnFe2O4 pseudocapacitive affinity water softening selective electrosorption
ISSN号	1944-8244
DOI	10.1021/acsami.1c09996
通讯作者	Zhou, Hongjian(hjzhou@issp.ac.cn) ; Zhang, Haimin(zhanghm@issp.ac.cn)
英文摘要	Pseudocapacitor-type hybrid capacitive deionization (PHCDI) has been developed extensively for deionization, which enables to address the worldwide freshwater shortage. However, the exploitation of selective hardness ion removal in resourceful hard water via the intrinsic pseudocapacitive effect, rather than the ion-sieving or ion-swapping effect based on the electric double layer (EDL) of porous carbon, is basically blank and urgent. Herein, manganese spinel ferrite (MFO) nanospheres were successfully fabricated by one-step solvothermal synthesis and used as the cathode for PHCDI assembled with commercial activated carbon. The MFO electrode exhibited prominent capacities of 534.6 mu mol g(-1) (CaCl2) and 980.4 mu mol g(-1) (MgCl2), outperforming those of other materials ever reported in the literature. Fascinatingly, systematic investigation of binary and ternary ion solutions showed the high electro-affinity of hardness ions (Ca2+ and Mg2+) toward Na+, especially the leading affinity of Mg2+, in which the superhigh hardness selectivity of 34.76 was achieved in the ternary solution with a molar ratio of Na-Ca-Mg as 20:1:1. Unexpectedly, the ion-swapping trace in a multi-ion environment was also first detected in our pseudocapacitive-based electrode. The electrochemical response in unary and multiple electrolytes disclosed that the unique pseudocapacitive affinity based on the cation (de)intercalation-redox mechanism was from the synergistic effect of the relative redox potential, ionic radius, and valence, in which the redox potential was the dominant factor.
资助项目	National Key R&D Program of China[2017YFA0207202] ; National Natural Science Foundation of China[51872291] ; National Natural Science Foundation of China[51872292]
WOS关键词	CARBON ELECTRODES ; CALCIUM-IONS ; WATER ; DEIONIZATION ; NANOPARTICLES
WOS研究方向	Science & Technology - Other Topics ; Materials Science
语种	英语
出版者	AMER CHEMICAL SOC
WOS记录号	WOS:000687172000095
资助机构	National Key R&D Program of China ; National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/124419]
专题	中国科学院合肥物质科学研究院
通讯作者	Zhou, Hongjian; Zhang, Haimin
作者单位	1.Chinese Acad Sci, Ctr Environm & Energy Nanomat, Inst Solid State Phys, Key Lab Mat Phys, Hefei 230031, Peoples R China 2.Univ Sci & Technol China, Dept Mat Sci & Engn, Hefei 230026, Peoples R China 3.Griffith Univ, Ctr Clean Environm & Energy, Gold Coast, Qld 4222, Australia
推荐引用方式 GB/T 7714	Xu, Yingsheng,Xiang, Shuhong,Zhou, Hongjian,et al. Intrinsic Pseudocapacitive Affinity in Manganese Spinel Ferrite Nanospheres for High-Performance Selective Capacitive Removal of Ca2+ and Mg2+[J]. ACS APPLIED MATERIALS & INTERFACES,2021,13.
APA	Xu, Yingsheng,Xiang, Shuhong,Zhou, Hongjian,Wang, Guozhong,Zhang, Haimin,&Zhao, Huijun.(2021).Intrinsic Pseudocapacitive Affinity in Manganese Spinel Ferrite Nanospheres for High-Performance Selective Capacitive Removal of Ca2+ and Mg2+.ACS APPLIED MATERIALS & INTERFACES,13.
MLA	Xu, Yingsheng,et al."Intrinsic Pseudocapacitive Affinity in Manganese Spinel Ferrite Nanospheres for High-Performance Selective Capacitive Removal of Ca2+ and Mg2+".ACS APPLIED MATERIALS & INTERFACES 13(2021).