Titanium Sulfides as Intercalation-Type Cathode Materials for Rechargeable Aluminum Batteries

Linxiao Geng; Jan P Scheifers; Chengyin Fu; Jian Zhang; Boniface P T Fokwa; Juchen Guo

doi:10.1021/acsami.7b04161

Titanium Sulfides as Intercalation-Type Cathode Materials for Rechargeable Aluminum Batteries

ACS Appl Mater Interfaces. 2017 Jun 28;9(25):21251-21257. doi: 10.1021/acsami.7b04161. Epub 2017 Jun 14.

Authors

Linxiao Geng¹, Jan P Scheifers², Chengyin Fu¹, Jian Zhang³, Boniface P T Fokwa^{2

3}, Juchen Guo^{1

3}

Affiliations

¹ Department of Chemical and Environmental Engineering, University of California , Riverside, California 92521, United States.
² Department of Chemistry, University of California , Riverside, California 92521, United States.
³ Materials Science and Engineering Program, University of California , Riverside, California 92521, United States.

PMID: 28570049
DOI: 10.1021/acsami.7b04161

Abstract

We report the electrochemical intercalation-extraction of aluminum (Al) in the layered TiS₂ and spinel-based cubic Cu_0.31Ti₂S₄ as the potential cathode materials for rechargeable Al-ion batteries. The electrochemical characterizations demonstrate the feasibility of reversible Al intercalation in both titanium sulfides with layered TiS₂ showing better properties. The crystallographic study sheds light on the possible Al intercalation sites in the titanium sulfides, while the results from galvanostatic intermittent titration indicate that the low Al³⁺ diffusion coefficients in the sulfide crystal structures are the primary obstacle to facile Al intercalation-extraction.

Keywords: aluminum intercalation; aluminum-ion battery; ionic liquid electrolyte; multivalent ion battery; titanium sulfides.