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

文献类型：期刊论文

作者Zhou, Huang3; Cao, Zhitao3; Zhou, Yifan3; Li, Jiangxu1; Ling, Zhaohong3; Fang, Guozhao2,3; Liang, Shuquan2,3; Cao, Xinxin2,3
刊名NANO ENERGY
出版日期2023-09-01
卷号114页码:10
关键词Anionic substitution Cathode material Fluorophosphate Sodium-ion batteries
ISSN号2211-2855
DOI10.1016/j.nanoen.2023.108604
通讯作者Liang, Shuquan(lsq@csu.edu.cn) ; Cao, Xinxin(caoxinxin@csu.edu.cn)
英文摘要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.
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
语种英语
WOS记录号WOS:001023314200001
出版者ELSEVIER
资助机构National Natural Science Foundation of China ; Natural Science Foundation of Hunan Province ; Science and Technology Innovation Program of Hunan Province
源URL[http://ir.imr.ac.cn/handle/321006/178465]  
专题金属研究所_中国科学院金属研究所
通讯作者Liang, Shuquan; Cao, Xinxin
作者单位1.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Liaoning, Peoples R China
2.Cent South Univ, Key Lab Elect Packaging & Adv Funct Mat Hunan Prov, Changsha 410083, Hunan, Peoples R China
3.Cent South Univ, Sch Mat Sci & Engn, 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.

入库方式： OAI收割

来源：金属研究所

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