Herein, we report a polymer cell using high-energy lithium metal anode, a composite sulfur-carbon cathode, and polyethylene oxide (PEO)-lithium trifluoromethan sulfonate (LiCF3SO3) electrolyte. The limited cost of raw materials as well as the very simple synthetic procedures, involving planetary ball milling (for S-C cathode) and solvent casting (for PEO-electrolyte), are expected to reflect into remarkable reduction of the economic impact of the proposed battery. Furthermore, the high energy of the Li-S cell and safety of the polymer configuration represent additional bonuses of the system. The S-C material, revealing a maximum capacity as high as 700 mAh g−1 in liquid electrolyte, is employed in a lithium-sulfur battery with the polymer configuration. The polymer cell delivers a capacity of 450 mAh g−1 at a voltage of about 2 V; hence, a theoretical energy density of 900 Wh kg−1 that may reflect into a high practical value, suitable for energy storage applications.
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The authors thank the collaboration project “Accordo di Collaborazione Quadro 2015” between University of Ferrara (Department of Chemical and Pharmaceutical Sciences) and Sapienza University of Rome (Chemistry Department). One of us (LC) would thank the Erasmus Placement Project performed in Volkswagen AG, Hanau, Germany.
Lee DJ, Agostini M, Park JW, et al. (2013) Progress in lithium-sulfur batteries: the effective role of a polysulfide-added electrolyte as buffer to prevent cathode dissolution. ChemSusChem 6:2245–2248. doi:10.1002/cssc.201300313CrossRefGoogle Scholar
Hassoun J, Scrosati B (2010) Moving to a solid-state configuration: a valid approach to making lithium-sulfur batteries viable for practical applications. Adv Mater 22:5198–5201. doi:10.1002/adma.201002584CrossRefGoogle Scholar
Shin JH, Lim YT, Kim KW, et al. (2002) Effect of ball milling on structural and electrochemical properties of (PEO)nLiX (LiX = LiCF3SO3 and LiBF4) polymer electrolytes. J Power Sources 107:103–109. doi:10.1016/S0378-7753(01)00990-9
Li Q, Sun HY, Takeda Y, et al. (2001) Interface properties between a lithium metal electrode and a poly(ethylene oxide) based composite polymer electrolyte. Spec Issue Interfacial Phenom Batter 94:201–205. doi:10.1016/S0378-7753(00)00587-5Google Scholar
Agostini M, Hassoun J, Liu J, et al. (2014) A lithium-ion sulfur battery based on a carbon-coated lithium-sulfide cathode and an electrodeposited silicon-based anode. ACS Appl Mater Interfaces 6:10924–10928. doi:10.1021/am4057166CrossRefGoogle Scholar
Barchasz C, Molton F, Duboc C (2012) Lithium/sulfur cell discharge mechanism: an original approach for intermediate species identification. Anal Chem 84:3973–3980. doi:10.1021/ac2032244CrossRefGoogle Scholar
Lee JT, Zhao Y, Kim H, et al. (2014) Sulfur infiltrated activated carbon cathodes for lithium sulfur cells: the combined effects of pore size distribution and electrolyte molarity. J Power Sources 248:752–761. doi:10.1016/j.jpowsour.2013.10.003CrossRefGoogle Scholar