New construction of polypyrrole interphase layers to improve performance stability of NaTi2(PO4)(3) anode for aqueous Na-ion batteries

doi:10.1016/j.ssi.2023.116259

IMR OpenIR

	New construction of polypyrrole interphase layers to improve performance stability of NaTi2(PO4)(3) anode for aqueous Na-ion batteries
	Wang, Wenjun 1; Wu, Jiangtao 2,3; Zeng, Chaoliu 1
通讯作者	Wang, Wenjun(wangwenjun@sslab.org.cn) ; Zeng, Chaoliu(zengchaoliu@sslab.org.cn)
	2023-09-01
发表期刊	SOLID STATE IONICS
ISSN	0167-2738
卷号	397 页码:16
摘要	NaTi2(PO4)(3) (NTP) as a promising anode material for aqueous sodium-ion batteries has attracted widespread attention. However, the NTP material commonly exhibits significant capacity fade, possibly mainly attributing to the change of the chemical stability of NTP in the aqueous electrolytes. Coating NTP with polypyrrole (PPY) conductive polymers is a promising strategy to solve this problem, but in situ synthesis of the PPY polymer in the presence of the NTP active materials seems not to be easy, reported by the previous work, owing to the inferior adhesion of the synthesized PPY to the NTP surface. Thereby, this work has attempted ex situ synthesis of PPY coatings on the carbon-coated NTP (NTP/C) anode surface in the presence of small amounts of carbon conductive additives and organic binders, and then it shows that synthesized conductive PPY interphase layer can readily adhere to the NTP surface with no visible phase separation through the electrochemical oxidation polymerization under certain potentials in the pyrrole (PY)-containing electrolytes. The corresponding optimized oxidation modification conditions of the anode can be obtained, and the evolution law of the anode interface with the content of the electrolyte additives, the oxidation potential and the oxidation time can be established. Thus, the as-synthesized optimal modified anodes, with the thickness of about 24 mu m for the PPY coating, are observed to have fairly large charge/discharge capacity of 228.6 mAh.g(-1), high coulombic efficiency (> 95%) and enhanced cycling stability. Furthermore, a schematic for the charge/discharge processes involving possible reaction pathways at the modified anodes with the PPY layers in Na2SO4 aqueous electrolytes has been proposed.
关键词	Aqueous sodium-ion batteries NaTi2(PO4)(3) anode Polypyrrole interphase layer Performance stability Electrochemical kinetics
资助者	Guangdong Basic and Applied Basic Research Foundation, China
DOI	10.1016/j.ssi.2023.116259
收录类别	SCI
语种	英语
资助项目	Guangdong Basic and Applied Basic Research Foundation, China[2019A1515110825]
WOS研究方向	Chemistry ; Physics
WOS类目	Chemistry, Physical ; Physics, Condensed Matter
WOS记录号	WOS:001001287500001
出版者	ELSEVIER
引用统计	被引频次：2[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/321006/178196
专题	中国科学院金属研究所
通讯作者	Wang, Wenjun; Zeng, Chaoliu
作者单位	1.Songshan Lake Mat Lab, Dongguan 523808, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China 3.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Wang, Wenjun,Wu, Jiangtao,Zeng, Chaoliu. New construction of polypyrrole interphase layers to improve performance stability of NaTi2(PO4)(3) anode for aqueous Na-ion batteries[J]. SOLID STATE IONICS,2023,397:16.
APA	Wang, Wenjun,Wu, Jiangtao,&Zeng, Chaoliu.(2023).New construction of polypyrrole interphase layers to improve performance stability of NaTi2(PO4)(3) anode for aqueous Na-ion batteries.SOLID STATE IONICS,397,16.
MLA	Wang, Wenjun,et al."New construction of polypyrrole interphase layers to improve performance stability of NaTi2(PO4)(3) anode for aqueous Na-ion batteries".SOLID STATE IONICS 397(2023):16.