Improve the Electrochemical Performance of Na2Ti3O7Nanorod through Pitch Coating

doi:10.1021/acssuschemeng.2c00047

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	Improve the Electrochemical Performance of Na2Ti3O7Nanorod through Pitch Coating
	Li, Shiyou 1,2,3; Wen, Shuxiang 1,3; Ding, Hao 3; Yang, Li 3; Zhao, Dongni 1,2,3; Zhang, Ningshuang 1,2,3; Dong, Hong 3; Wang, Shimin 3; Zhang, Jingjing 3; Wang, Jie 3
刊名	ACS Sustainable Chemistry and Engineering
	2022-04-04
卷号	10 期号:13 页码:4247-4257
关键词	Carbon Carbonization Crystallinity Electric discharges Electrochemical electrodes Expansion Lithium-ion batteries Metal ions Nanorods Porosity Sodium compounds Sodium-ion batteries Solid electrolytes Titanium compounds Electrochemical performance Higher energy density Low conductivity Low operating voltage Low-costs Pitch coating Porous structures Sodium ion batteries Through pitch Volume expansion
DOI	10.1021/acssuschemeng.2c00047
英文摘要	Na2Ti3O7is proposed as a potential anode for sodium ion batteries (SIBs) because of its advantages of low operating voltage, high energy density, and low cost. However, the low conductivity and the structural instability of the intercalated phase limit its practical application. Herein, Na2Ti3O7@C nanorod composites are prepared by using Na2Ti3O7as the active substance particles and pitch as the carbon precursor. Pitch is selected due to the characteristics of low crystallinity, easy graphitization, and porous structure after carbonization. The results of electrochemical performance tests show that the Na2Ti3O7@C composite electrode has a good rate performance and stable cycle stability. In addition, the electrode thickness expansion rate of the Na2Ti3O7@C composite (22.28%) is lower than that of pure Na2Ti3O7(117.51%). The improvement of electrochemical performances mainly benefit from the porous structure of the pitch carbon layer, which reduces the volume expansion of Na2Ti3O7material from the charge-discharge process, avoids the damage of the solid electrolyte interphase (SEI) film outside the Na2Ti3O7@C composites, and thus maintains the integrity of the structure to extend the service life. This work offers some new perceptions into the mechanism of carbon coating. © 2022 American Chemical Society. All rights reserved.
语种	英语
出版者	American Chemical Society
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/158385]
专题	石油化工学院马克思主义学院
作者单位	1.Gansu Engineering Laboratory of Electrolyte Material for Lithium-ion Battery, Lanzhou; 730050, China; 2.Gansu Engineering Laboratory of Cathode Material for Lithium-ion Battery, Baiyin; 730900, China 3.College of Petrochemical Technology, Lanzhou University of Technology, Lanzhou; 730050, China;
推荐引用方式 GB/T 7714	Li, Shiyou,Wen, Shuxiang,Ding, Hao,et al. Improve the Electrochemical Performance of Na2Ti3O7Nanorod through Pitch Coating[J]. ACS Sustainable Chemistry and Engineering,2022,10(13):4247-4257.
APA	Li, Shiyou.,Wen, Shuxiang.,Ding, Hao.,Yang, Li.,Zhao, Dongni.,...&Wang, Jie.(2022).Improve the Electrochemical Performance of Na2Ti3O7Nanorod through Pitch Coating.ACS Sustainable Chemistry and Engineering,10(13),4247-4257.
MLA	Li, Shiyou,et al."Improve the Electrochemical Performance of Na2Ti3O7Nanorod through Pitch Coating".ACS Sustainable Chemistry and Engineering 10.13(2022):4247-4257.