Expanded interlayer spacing of graphene oxide achieved by electrostatic cation intercalation towards superior sodium ion storage

doi:10.1007/s11581-022-04636-x

	Expanded interlayer spacing of graphene oxide achieved by electrostatic cation intercalation towards superior sodium ion storage
	Hu, Yu-Xia 2,3,4; Zhang, Dong-Ting 2,3; Tang, Fu-Ling 2,3; Tian, Chen-Yang 2,3; Li, Jun 2,3; Jin, Xin 2,3; Chang, Cheng-Gong 1,5; Liu, Mao-Cheng 2,3
刊名	IONICS
	2022-06-01
卷号	28 期号:8 页码:3833-3842
关键词	Na+ ion storage Controllably enlarged interlayer spacing Graphene oxide Structure stability High rate capability
ISSN号	0947-7047
DOI	10.1007/s11581-022-04636-x
英文摘要	Graphite has been employed as anode material of lithium ion batteries due to its low cost, unique layered structure, and high conductivity; however, the small interlayer spacing and poor rate capability limit its application in sodium ion batteries. To address these issues, the interlayer spacing of graphene oxide (GO) was controllably enlarged through K+ and Ca2+ pillaring by the electrostatic interaction between the negatively charged GO sheets and the positively charged K+/Ca2+. The K+/Ca2+ pillared in the interlayers of GO can controllably expand the interlayer spacing from 0.78 to 1.01 nm by regulating the K+/Ca2+ concentrations. The K+/Ca2+-pillared GO (K+/Ca2+-GO) exhibits high Na+ ion storage performance because of expanded interlayer spacing, showing large Na+ ion diffusion coefficient (the largest DNa+ is 43.8 x 10(-15) cm(2) s(-1)) and high reversible specific capacity (199.3 mAh g(-1) at 0.1 A g(-1)). Meanwhile, the 2D layered structure of GO is stabilized by the pillar effects of K+/Ca2+ to realize a superior cycle stability of Na+ insertion/extraction. The relations between the interlayer spacing of K+/Ca2+-GO and rate capability are studied and an optimum interlayer spacing of K+/Ca2+-GO for high rate Na+ storage (0.84 nm and 1.01 nm for K+-GO and Ca2+-GO) is obtained. The results provide an essential reference for design of high rate 2D energy storage materials.
WOS研究方向	Chemistry ; Electrochemistry ; Physics
语种	英语
出版者	SPRINGER HEIDELBERG
WOS记录号	WOS:000810853100001
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/158954]
专题	材料科学与工程学院理学院
作者单位	1.Chinese Acad Sci, Qinghai Inst Salt Lake, Key Lab Comprehens & Highly Efficient Utilizat Sa, Xining 810008, Peoples R China; 2.Lanzhou Univ Technol, State Key Lab Adv Proc & Recycling Nonferrous Met, Lanzhou 730050, Peoples R China; 3.Lanzhou Univ Technol, Sch Mat Sci & Engn, Lanzhou 730050, Peoples R China; 4.Lanzhou City Univ, Sch Bailie Engn & Technol, Lanzhou 730070, Peoples R China; 5.Key Lab Salt Lake Resources Chem Qinghai Prov, Xining 810008, Peoples R China
推荐引用方式 GB/T 7714	Hu, Yu-Xia,Zhang, Dong-Ting,Tang, Fu-Ling,et al. Expanded interlayer spacing of graphene oxide achieved by electrostatic cation intercalation towards superior sodium ion storage[J]. IONICS,2022,28(8):3833-3842.
APA	Hu, Yu-Xia.,Zhang, Dong-Ting.,Tang, Fu-Ling.,Tian, Chen-Yang.,Li, Jun.,...&Liu, Mao-Cheng.(2022).Expanded interlayer spacing of graphene oxide achieved by electrostatic cation intercalation towards superior sodium ion storage.IONICS,28(8),3833-3842.
MLA	Hu, Yu-Xia,et al."Expanded interlayer spacing of graphene oxide achieved by electrostatic cation intercalation towards superior sodium ion storage".IONICS 28.8(2022):3833-3842.