Controlled Synthesis, Processing, and Applications of Structural and Functional Nanomaterials: On-Demand Poster Presentations
Sponsored by: ACerS Basic Science Division, ACerS Electronics Division, ACerS Engineering Ceramics Division
Program Organizers: Haitao Zhang, University of North Carolina at Charlotte; Gurpreet Singh, Kansas State University; Kathy Lu, University of Alabama Birmingham; Edward Gorzkowski, Naval Research Laboratory; Jian Shi, Rensselear Polytechnich University; Michael Naguib, Tulane University; Sanjay Mathur, University of Cologne
Friday 8:00 AM
October 22, 2021
Room: On-Demand Poster Hall
Location: MS&T On Demand
Poster
A Comparative Study of Tantalum Disulfide as Lithium-ion and Potassium-ion Batteries: Davi Marcelo Soares1; Gurpreet Singh1; 1Kansas State University
Nowadays technological products have an ever-increasing demand for higher energy density batteries. In this scenario, the development of high-performance electrode materials requires understanding of the intercalation processes for ions such as Li+ and K+. Tantalum disulfide (TaS2) is a layered polymorph transition metal dichalcogenides (TMD) species that presents metallic conductivity in its 2H phase. Here we report 2H-TaS2 as electrode material for lithium- (LIB) and potassium-ion (PIB) batteries in a comprehensive electrochemical study. Our findings show that as LIB electrode material, TaS2 presented first cycle charge specific capacity of LIB is 344 mAh g-1. Yet as a PIB electrode material, TaS2 presented cycling stability with capacity decay of 0.23% per cycle within 40 cycles at 50 mA g-1. To summarize, this works consists of an initial study of charge storage mechanism of Li+ and K+ in 2H-TaS2 to enable further developments in the field for this intriguing TMD species.
Poster
Tungsten Ditelluride, A Semimetal Transition Metal Dichalcogenide as Active Material for Monovalent-ion Battery Electrodes: Davi Marcelo Soares1; Gurpreet Singh1; 1Kansas State University
Electrochemical energy storage systems (EESS) have achieved in the past few decades a prominent place for several applications due to their high conversion efficiency and high energy densities. However, the widespread use of EESS requires the continuous development of novel electrode materials towards higher energy density batteries. In this comparative work we report tungsten ditelluride (WTe2) as lithium-ion battery (LIB) and potassium-ion battery (KIB) electrode material. Presenting a layered structure, this semimetal transition metal dichalcogenide (TMD) showed cycling stability as electrode material for LIB and KIB. Concerning the KIB results, in half-cell configuration WTe2 stored up to 3.3 K+ per formula unit, at least 4 times of WS2 KIB electrode. To summarize, this work unveils the potential of WTe2 as anode for LIB and KIB due to its physical and electrochemical properties. Results presented herein are compared with other electrode materials, namely graphite and WS2.