NiSe2 Nanooctahedra as an Anode Material for High-Rate and Long-Life Sodium-Ion Battery

Shaohua Zhu; Qidong Li; Qiulong Wei; Ruimin Sun; Xiaoqing Liu; Qinyou An; Liqiang Mai

doi:10.1021/acsami.6b10143

NiSe₂ Nanooctahedra as an Anode Material for High-Rate and Long-Life Sodium-Ion Battery

ACS Appl Mater Interfaces. 2017 Jan 11;9(1):311-316. doi: 10.1021/acsami.6b10143. Epub 2016 Dec 20.

Authors

Shaohua Zhu¹, Qidong Li¹, Qiulong Wei¹, Ruimin Sun¹, Xiaoqing Liu², Qinyou An¹, Liqiang Mai¹

Affiliations

¹ State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology , Wuhan 430070, China.
² Center of Materials Research and Testing, Wuhan University of Technology , Wuhan 430070, China.

PMID: 27936550
DOI: 10.1021/acsami.6b10143

Abstract

In this article, we report NiSe₂ nanooctahedra as a promising anode material for sodium-ion batteries (SIBs). They exhibit outstanding long-term cyclic stability (313 mAh/g after 4000 cycles at 5 A/g) and excellent high-rate capability (175 mAh/g at 20 A/g). Besides, the initial Coulombic efficiency of NiSe₂ is also very impressive (over 90%). Such remarkable performances are attributed to good conductivity, structural stability, and the pseudocapacitive behavior of the NiSe₂. Furthermore, the sodium ion storage mechanism of NiSe₂ is first investigated by in situ XRD and ex situ XRD. These highlights give NiSe₂ a competitive strength for rechargeable SIBs.

Keywords: NiSe2 nanooctahedra; anode; high-rate; long-term cycle life; sodium-ion batteries.