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Synthesis and characterization of Lead sulfate/ graphene nano sheets composites as anode materials for lead acid battery
MA Jingliang 1,WANG Dianlong 2 * #
1.School of Chemical Engineering and Technology, Harbin Institute of Technology, Harbin 150001
2.School of Chemical Engineering and Technology, Harbin Institute of Technology, Harbin 150001
*Correspondence author
#Submitted by
Subject:
Funding: The Ph. D Programs Foundation of Ministry of Education of China （No.No. 20092302110052）
Opened online:23 January 2013
Accepted by: none
Citation: MA Jingliang,WANG Dianlong.Synthesis and characterization of Lead sulfate/ graphene nano sheets composites as anode materials for lead acid battery[OL]. [23 January 2013] http://en.paper.edu.cn/en_releasepaper/content/4515367
 
 
In this paper, we have used a simple impregnation way to synthesize lead sulfate/graphene nano sheets (GNS) composites in order to make lead sulfate available for being used as negative active materials of lead acid battery. Compared with pure lead sulfate electrodes, the composite electrodes display higher specific capacity and rechargeable performance under high rates charge and discharge. The electrochemical characteristic of the composites electrode has been investigated by cyclic voltammetry (CV) and battery tests. The cyclic voltammetry results show that capacitive effect of graphene nano sheets becomes more obvious with the increases of scanning rates, meanwhile hydrogen evolution also enhances. The battery charge-discharge curves confirm that graphene nano sheets can help improve the capacity of lead sulfate, and graphene nano sheets improve the charging voltage. The composites are characterized by X-ray diffraction (XRD) and scanning electron microscope (SEM) whose results show that lead sulfate particles are well dispersed on surface of graphene nano sheets instead of agglomerate whether for raw materials or negative active materials after charge and discharge. The morphologies characterization and electrochemical tests demonstrate that synthetic composites can be used as negative active materials and graphene nano sheets can promote dispersion and electrochemical performance of lead sulfate.
Keywords:Applied Chemistry; lead acid battery; impregnation method; lead sulfate; graphene nano sheet; capacitive effect
 
 
 

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