Tunable core-shell single-walled carbon nanotube-Cu2S networked nanocomposites as high-performance cathodes for lithium-ion batteries

JOURNAL OF POWER SOURCES

卷:280

Article

Meng, Xiangbo¹  Riha, Shannon C.²  Libera, Joseph A.¹  Wu, Qingliu³  Wang, Hsien-Hau²  Martinson, Alex B. F.²  Elam, Jeffrey W.¹ 

[1] Argonne Natl Lab, Div Energy Syst, Argonne, IL 60439 USA

[2] Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA

[3] Argonne Natl Lab, Chem Sci & Engn Div, Argonne, IL 60439 USA

关键词: Cu2S;    Cathode;    Atomic layer deposition;    Lithium-ion battery;   

DOI  :  10.1016/j.jpowsour.2015.01.151

来源: Elsevier

【 摘 要 】

In this study, nanoscale copper(I) sulfide (n-Cu2S) was deposited over networks of single-walled carbon nanotubes (SWCNTs) by atomic layer deposition (ALD). This synthetic route provides a high degree of control for tuning the materials properties. The resulting core shell SWCNT-n-Cu2S composite structure ensures an intimate contact between the two components while maintaining a high porosity for efficient transport of charges. Indeed, electrochemical testing demonstrates that these nanocomposites are promising as cathodes in lithium-ion batteries (LIBs), exhibiting excellent stability over 200 discharge-charge cycles with a sustainable, high capacity of 260 mAh g(-1) (92% of the theoretical value in terms of Cu2S) and >99% Coulombic efficiency. This work establishes a general strategy for developing high-performance nanoscale electrode materials. (C) 2015 Elsevier B.V. All rights reserved.

【 授权许可】

Free