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Title: Route of irreversible transformation in layered tin thiophosphite and enhanced lithium storage performance
Authors: Edison, Eldho
Chaturvedi, Apoorva
Ren, Hao
Sreejith, Sivaramapanicker
Lim, Chwee Teck
Madhavi, Srinivasan
Keywords: Engineering::Materials
Issue Date: 2018
Source: Edison, E., Chaturvedi, A., Ren, H., Sreejith, S., Lim, C. T., & Madhavi, S. (2018). Route of irreversible transformation in layered tin thiophosphite and enhanced lithium storage performance. ACS Applied Energy Materials, 1(10), 5772-5778. doi:10.1021/acsaem.8b01357
Project: National Research Foundation of Singapore (NRF) Investigatorship award number NRF2016NRF-NRFI001-22. 
Journal: ACS Applied Energy Materials 
Abstract: Novel materials with high lithium-storage capacities are indispensable to substantially increase the gravimetric and volumetric energy densities of lithium-ion batteries. In this context, metal thiophosphites (MTPs) possessing a layered structure are considered ideal candidates to serve as alkali-ion hosts. Herein, the lithium storage properties of layered tin thiophosphite (SnPS3) crystals have been investigated in coin-cell configuration. The results reveal that SnPS3 undergoes a conversion and alloying reaction to deliver high lithiation capacities. The SnPS3 anode delivered a significant lithiation capacity of ∼800 mAh g-1 at a specific current of 100 mA g-1. Moreover, the layered structure was able to accommodate the volume changes upon (de)lithiation as evident from its excellent cycling stability. Additionally, the SnPS3 anode demonstrated excellent rate capability as well and delivered ∼315 mAh g-1 at a high specific current of 2 A g-1. Furthermore, the lithium-storage mechanism was investigated through cyclic voltammetry and ex situ X-ray diffraction and X-ray photoelectron spectroscopy studies. Studies of SnPS3 anode in a full cell configuration by coupling with commercial LiNi0.33Co0.33Mn0.33O2 cathode are also presented. The outstanding electrochemical performance demonstrated by the SnPS3 anode calls for further research into this novel class of metal thiophosphites for energy storage applications.
ISSN: 2574-0962
DOI: 10.1021/acsaem.8b01357
Schools: School of Materials Science and Engineering 
Rights: This document is the Accepted Manuscript version of a Published Work that appeared in final form in ACS Applied Energy Materials, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see
Fulltext Permission: open
Fulltext Availability: With Fulltext
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