Journal of Inorganic Materials

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Potassium Salts as Electrolyte Additives for Enhancing Electrochemical Performances of Natural Graphite Anodes

ZHENG Hong-He1, WANG Xian-Jun2, LI Bao1, CHANG Zhao-Rong1   

  1. 1. College of Chemistry & Environmental Sciences, Henan Normal University, Xinxiang 453007, China; 2. Department of Physics, Henan Institute of Education, Zhengzhou 450014, China

  • Received:2005-09-29 Revised:2006-01-18 Published:2006-09-20 Online:2006-09-20

Abstract: Addition of different potassium salts into 1mol/L LiClO4/EC+DEC electrolyte can reduce the initial irreversible capacity loss at the first cycle and improve the reversible capacity and the rate capability of a natural graphite anode. Electrochemical impedance spectroscopy (EIS) and FTIR studies demonstrated the formation of a more conductive and thinner SEI layer on the graphite surface in the electrolyte containing a certain amount of potassium salt.

Key words: lithium-ion battery, natural graphite, electrolyte, additive

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