Int. J. of Nanomanufacturing   »   2016 Vol.12, No.3/4

 

 

Title: The structure transformation and electrochemical mechanism of cathode material Li0.86V0.8O2

 

Authors: Fang Hu; Fenghui Gong; Fang Wang; Yinling Jin; Xiang Wu

 

Addresses:
School of Materials Science and Engineering, Shenyang University of Technology, Shenyang, 110870, China
School of Materials Science and Engineering, Shenyang University of Technology, Shenyang, 110870, China
School of Materials Science and Engineering, Shenyang University of Technology, Shenyang, 110870, China
School of Materials Science and Engineering, Shenyang University of Technology, Shenyang, 110870, China
School of Materials Science and Engineering, Shenyang University of Technology, Shenyang, 110870, China

 

Abstract: Li0.86V0.8O2 cathode materials were prepared by a simple hydrothermal route. The results showed the as-obtained product had a layered hexagonal structure with the Li/V site disorder. The electrochemical tests in the rechargeable lithium batteries presented a capacity fading during the cycling. The crystal structure and local structure of the material during the cycles were also studied by X-ray diffraction and infrared spectrum, which demonstrated the capacity fading during the electrochemical cycling could be attributed to small irreversible structure change in the first charging process, and the loss of the first discharge can be assigned to the short-range disorder of V ions in the oxygen layers.

 

Keywords: lithium-ion batteries; Li0.86V0.8O2; cathode materials; electrochemical performance; hydrothermal method; capacity fading; short-range disorder; structure transformation; vanadium oxide; LiVO2; rechargeable batteries.

 

DOI: 10.1504/IJNM.2016.079216

 

Int. J. of Nanomanufacturing, 2016 Vol.12, No.3/4, pp.278 - 285

 

Submission date: 07 May 2015
Date of acceptance: 07 Dec 2015
Available online: 20 Sep 2016

 

 

Editors Full text accessAccess for SubscribersPurchase this articleComment on this article