tailieunhanh - Sodium lauryl sulfate effects on electrochemical behavior of positive active material and commercial positive plates in lead-acid battery
By increasing SLS concentrate, crystalline structure of positive active material changed. The effects of SLS on kinetic parameters of positive electrode reactions are also discussed in this paper. The results showed that SLS is promising for use as electrolyte additive for lead- acid batteries. | Vietnam Journal of Science and Technology 55 (5B) (2017) 1-8 SODIUM LAURYL SULFATE EFFECTS ON ELECTROCHEMICAL BEHAVIOR OF POSITIVE ACTIVE MATERIAL AND COMMERCIAL POSITIVE PLATES IN LEAD-ACID BATTERY Xuan Thang Nguyen1, *, Duy Ket Nguyen1, Thi Hanh Pham2, Minh Thanh Vu1 1 Science Institute of Military Technology, 17 Hoang Sam Street, Cau Giay Dist, Ha Noi 2 Center for Research, Consultant and Chemical Technology Transfer, 77th, 337 Ward, Cau Giay Dist, Ha Noi * Email: Thangcnhh256@ Received: 10 September 2017; Accepted for publication: 8 October 2017 ABSTRACT Sodium lauryl sulfate (SLS) is an anionic surfactant used in many applications such as cleaning and hygiene products, electroplating, etc. For the first time, effects of SLS as an electroyte additive on electrochemical behavior of positive active material and commercial positive plates have been studied by cyclic voltammetry (CV), eletrochemical impedance measurements. The electrode surface morphology after 20 cycles of CV was studied by using scanning electron microscopy (SEM). Results show that SLS additive significantly improves the conversion reactions of positive active material and therefore enhances charge/discharge capacity. By increasing SLS concentrate, crystalline structure of positive active material changed. The effects of SLS on kinetic parameters of positive electrode reactions are also discussed in this paper. The results showed that SLS is promising for use as electrolyte additive for lead- acid batteries. Keywords: lead-acid battery, positive plate, positive active material, electrolyte aditive, sodium lauryl sulfate. 1. INTRODUCTION Lead acid battery is a long-standing traditional source of power, with many outstanding features such as high electrity, stable operation, small inert resistance, simple structure, low cost, etc. Lead acid batteries are widely used for starting, lighting, ignition (SLI) batteries, backup power supply, etc, resulting in annual turnovers of lead acid
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