石墨烯硫酸铅复合材料的制备及其在铅酸电池中的电化学性能.pdf

第29卷第9期
无机化学学报
2013年9月
CHINESE JOURNAL OF INORGANIC CHEMISTRY
1935-1941
石墨烯酸铅复合材料的制备及其在铅酸电池中的电化学性能
马荆亮1王殿龙*陈飞2方明学2
(哈尔滨工业大学化工学院,哈尔滨15000)
(天能集团,沭阳223600
摘要:利用简单的浸渍法制备了石烯/硫酸铅复合材料,使得硫酸铅可以直接用作铅酸电池负极材料。该复合材料分别以
100mA·g,200mA·g1和300mAg电流密度放电时,平均放电比容量分別可达到110,94和69mAh?g',而硫酸铅仅为49、5
和0.5mAhg',显示出复合材料在高倍率充放电下更好的比容量和再接受充电能力。循环伏安测试表明石墨烯的电容效应随
扫描速率増大而增强,同时析氢也变得严重,使得复合材料在充放电过程中充电效率比纯硫酸铅低20%。在充放电过程中,石
墨烯能够提高硫酸铅1倍以上的放电容量,并将充电电压提高0.1V。XRD和SEM结果显示硫酸铅均匀分布在石墨烯片层上
没有出现堌聚现象。
关键词:铅酸电池;浸渍法;硫酸铅;石墨烯;电容效应
中图分类号:0646.21
文献标识码:A
文章编号:1001-4861(2013)09-1935-07
DO1:10.39695issn.1001-4861.2013.00.252
Synthesis and Characterization of Lead Sulfate/Graphene Nano
Sheets Composites as Anode Materials for Lead Acid Battery
MA Jing-liang WANG Dian-long CHEN Fei FANG Ming-xue2
School of Chemical Engineering and echnology, Harbin Institute of echnology, Harbin, Heilongjiang 150001, China)
(]ianneng Group, Shuyang, Jiangsu 223600, China
Abstract: Iead sulfate/graphene nano sheets (GNS)composites were fabricated by using a simple impregnation
method. The composite was used as a negative active material for lead acid battery. Compared with pure lead
sulfate electrodes, the composite electrodes display higher specific capacity and rechargeable performance under
high charge and discharge rates. An average discharging specific capacity of PSO, GNS composites reaches 110,
94 and 69 mah g at current density of 100 MA. g, 200 MA.g and 300 MA g, respectively. However, the
average discharging capacity of Pbso only reaches 49, 5 and 0.5 mah'g"at the same condition. The
electrochemical characteristic of the composites electrode was studied by cyclic voltammetry (CV) and battery
tests. The cyclic voltammetry results show that capacitive effect and the hydrogen evolution of graphene nano
sheets become more obvious with the increase in scanning rate resulting in 20% lower charging efficiency of
PBSO/GNS composites compared to lead sulfate. The battery charge-discharge curves confirm that graphene nano
sheets improve the charging voltage about 0.1 V and can also help double the capacity of lead sulfate. The XRD
and SEM results show that lead sulfate particles are well dispersed on the surface of graphene nano sheets
instead of agglomerating
Key words: lead acid battery; impregnation method; lead sulfate; graphene nano sheet; capacitive effect
收稿日期:2012-11-29。收修改稿日期:2013-03-20。
国家自然科学基金(N。50974045),教育部博士点基金(No.2009230211002),黑龙江省自然科学基金(NB200918)资助项目。
*通讯联系人。E-mal:wangdianlonghit(@163.com