Effect of solution additives on the performance of PMAN carbon anodes in 1M LiPF{sub 6}/EC-DMC solutions

• Main Authors: Guidotti, Ronald A., Johnson, Bryan J.
• Other Authors: United States. Department of Energy.
• Format: Report
• Language: English
• Published: Sandia National Laboratories 1996
• Subjects: 25 Energy Storage; Anodes; Metal-Nonmetal Batteries; Materials Testing; Lithium Compounds; Service Life; Carbon; Experimental Data; Carbonic Acid Esters; Additives; Performance; Carbonic acid
• Online Access: https://doi.org/10.2172/486068; https://digital.library.unt.edu/ark:/67531/metadc687683/

A study was undertaken to examine the use of a number of solution additives in 1M LiPF{sub 6}/ethylene carbonate (EC)-dimethyl carbonate (DMC) solutions to improve the performance of carbon anodes derived from polymethylacrylonitrile (PMAN)-divinylbenzene (DVB) copolymers. The study goals were to improve the cycle life and reduce the formation of the passivation layer during the first reduction, thereby minimizing the irreversible-capacity losses. Additives studied were 12-crown-4 (12-Cr-4) ether, decalin, and dilithium phthalocyanine (Li{sub 2}Pc). The carbon performance was characterized by galvanostatic cycling, cyclic voltammetry, and complex-impedance spectroscopy. Limited success was obtained with 12-Cr-4 ether at 0.25 M and decalin at 1 v/o. Poor results were noted with Li{sub 2}Pc at 0.025 M and 0.5 M.