Preparation of a γ-Fe2 O3 /Ag nanowire coaxial nanocable for high-performance lithium-ion batteries

Hongbo Geng; Danhua Ge; Shuanglong Lu; Jiaqing Wang; Zhengmao Ye; Yonggang Yang; Junwei Zheng; Hongwei Gu

doi:10.1002/chem.201500819

Preparation of a γ-Fe2 O3 /Ag nanowire coaxial nanocable for high-performance lithium-ion batteries

Chemistry. 2015 Jul 27;21(31):11129-33. doi: 10.1002/chem.201500819. Epub 2015 Jun 23.

Authors

Hongbo Geng^{1

2}, Danhua Ge¹, Shuanglong Lu¹, Jiaqing Wang¹, Zhengmao Ye¹, Yonggang Yang¹, Junwei Zheng^{3

4}, Hongwei Gu⁵

Affiliations

¹ Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science & Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou, 215123 (P.R. China).
² College of Physics, Optolectronics and Energy, Soochow University, Suzhou, 215006 (P.R. China).
³ Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science & Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou, 215123 (P.R. China). jwzheng@suda.edu.cn.
⁴ College of Physics, Optolectronics and Energy, Soochow University, Suzhou, 215006 (P.R. China). jwzheng@suda.edu.cn.
⁵ Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science & Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou, 215123 (P.R. China). hongwei@suda.edu.cn.

PMID: 26102517
DOI: 10.1002/chem.201500819

Abstract

In this study, we report the design and synthesis of a silver nanowire-γ-Fe2 O3 coaxial nanocable architecture (Ag NWs@γ-Fe2 O3 nanocable) through mild oxidation of [Fe(CO)5 ] on the surface of silver nanowires followed by a calcination process. After optimization of the structural design, the Ag NWs@γ-Fe2 O3 nanocable could deliver superior lithium storage performance in terms of high reversible capacity, good rate performance, and excellent stability, such as a high reversible capacity of about 890 mA h g(-1) after 60 cycles at a current rate of 0.1 C (1.0 C=1005 mA g(-1) ). The reversible capacity remains as high as about 550 mA h g(-1) even at a high current rate of 2.0 C. This dramatic performance is mainly attributed to the smart coaxial design, which can not only alleviate the large volume change and prevent the aggregation of γ-Fe2 O3 nanoparticles, but also enables good conductivity and thus enhances fast charge transfer. The unique structural features of the Ag NWs@γ-Fe2 O3 nanocable represent a promising anode material in lithium-ion battery applications.

Keywords: anodes; iron; lithium; nanostructures; silver.