Unlocking rapid and robust sodium storage of fluorophosphate cathode via multivalent anion substitution

doi:10.1016/j.nanoen.2023.108604

IMR OpenIR

	Unlocking rapid and robust sodium storage of fluorophosphate cathode via multivalent anion substitution
	Zhou, Huang 1; Cao, Zhitao 1; Zhou, Yifan 1; Li, Jiangxu 2; Ling, Zhaohong 1; Fang, Guozhao 1,3; Liang, Shuquan 1,3; Cao, Xinxin 1,3
通讯作者	Liang, Shuquan(lsq@csu.edu.cn) ; Cao, Xinxin(caoxinxin@csu.edu.cn)
	2023-09-01
发表期刊	NANO ENERGY
ISSN	2211-2855
卷号	114 页码:10
摘要	Polyanion-type fluorophosphate Na3V2(PO4)2O2F (NVPOF) is broadly regarded as a fascinating cathode candidate for high energy density and sustainable sodium-ion batteries (SIBs) due to its high operating potential, high capacity and robust sodium super-ionic conductor (NASICON) framework. However, the inferior rate property and service life caused by its intrinsically low electron conductivity seriously impede its electrochemical performance. Herein, an extraordinary Na+ storage performance in Na3V2(PO4)1.95(SiO4)0.05O2F (NVPOFSi0.05) is obtained through partially replacing PO43- in NVPOF with SiO44-. Theoretical calculation and experimental analysis indicate that this anion substitution optimizes the electronic conductivity and broadens ionic transport channels, leading to faster ion/charge diffusion kinetics. Meanwhile, SiO44--introduced reinforces the crystal structure to support reversible two-electron reaction, and enhances energy density with higher mean discharge voltage. Therefore, the NVPOFSi0.05 cathode exhibits a remarkable enhancement in high-rate capability (75.5 mA h g � 1 at 30 C) and virtually no capacity loss during the long-term cycling at 10 C over 1000 cycles. The full cell coupled with the NVPOFSi0.05 cathode and hard carbon anode possesses high energy density (280 W h kg � 1) and exceptional long-term cyclability (92.3% capacity retention after 300 cycles at 5 C). This anion substitution device opens new avenues toward the design of advanced cathode materials for SIBs.
关键词	Anionic substitution Cathode material Fluorophosphate Sodium-ion batteries
资助者	National Natural Science Foundation of China ; Natural Science Foundation of Hunan Province ; Science and Technology Innovation Program of Hunan Province
DOI	10.1016/j.nanoen.2023.108604
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[52002407] ; National Natural Science Foundation of China[51932011] ; National Natural Science Foundation of China[52272260] ; Natural Science Foundation of Hunan Province[2023JJ10060] ; Natural Science Foundation of Hunan Province[2021JJ40730] ; Science and Technology Innovation Program of Hunan Province[2022RC1078]
WOS研究方向	Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics
WOS类目	Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied
WOS记录号	WOS:001023314200001
出版者	ELSEVIER
引用统计	被引频次：15[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/178466
专题	中国科学院金属研究所
通讯作者	Liang, Shuquan; Cao, Xinxin
作者单位	1.Cent South Univ, Sch Mat Sci & Engn, Changsha 410083, Hunan, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Liaoning, Peoples R China 3.Cent South Univ, Key Lab Elect Packaging & Adv Funct Mat Hunan Prov, Changsha 410083, Hunan, Peoples R China
推荐引用方式 GB/T 7714	Zhou, Huang,Cao, Zhitao,Zhou, Yifan,et al. Unlocking rapid and robust sodium storage of fluorophosphate cathode via multivalent anion substitution[J]. NANO ENERGY,2023,114:10.
APA	Zhou, Huang.,Cao, Zhitao.,Zhou, Yifan.,Li, Jiangxu.,Ling, Zhaohong.,...&Cao, Xinxin.(2023).Unlocking rapid and robust sodium storage of fluorophosphate cathode via multivalent anion substitution.NANO ENERGY,114,10.
MLA	Zhou, Huang,et al."Unlocking rapid and robust sodium storage of fluorophosphate cathode via multivalent anion substitution".NANO ENERGY 114(2023):10.