摘要
为改善铅碳混合不均和负极析氢的问题,以D418大孔螯合磷酸树脂为碳源,制备出与Pb复合的N、P掺杂碳材料(N、P/RC@Pb)。采用X射线衍射(XRD)、扫描电镜(SEM)等手段对复合材料进行表征,对添加N、P/RC@Pb复合材料的负极板和铅碳电池进行了研究。结果表明:Pb均匀分布在树脂碳表面,以Pb复合物的形式与树脂碳紧密结合。线性伏安(LSV)测试表明:N、P/RC@Pb的添加能有效抑制析氢反应(HER),在-0.46 V下1%N、P/RC@Pb电极板拥有最小的析氢电流(-0.087 A/cm^(2)),更接近空白组(-0.053 A/cm^(2))。在电池循环测试中,添加1%N、P/RC@Pb的模拟电池的循环寿命为1834次,而空白电池循环寿命为837次。在容量测试中,含量为1%的N、P/RC@Pb的电池容量为241.0 mAh,较空白电池(157.8 mAh)提升了53%。N、P/RC@Pb复合材料制备方法简单,价格低廉,改善了铅碳混合不均问题,有效抑制了碳上的析氢反应,在铅碳电池中具有潜在的应用前景。
To ameliorate the problems of uneven Pb-carbon mixing and anode hydrogen precipitation,N,P-doped carbon materials compounded with Pb(N,P/RC@Pb)were prepared with D418 macroporous chelated phosphate resin as the carbon source.The materials were characterized by X-ray diffraction(XRD)and scanning electron microscopy(SEM),and the negative plates and lead-carbon batteries with N,P/RC@Pb composites added were investigated.The results show that Pb is uniformly distributed on the surface of the resin carbon and is tightly bound to the resin carbon in the form of Pb complexes.Linear voltammetry(LSV)tests showed that the addition of N,P/RC@Pb effectively suppressed the hydrogen precipitation reaction(HER),with the 1%N,P/RC@Pb electrode plate having the smallest hydrogen precipitation current(-0.087 A/cm^(2))at-0.46 V,closer to the blank group(-0.053 A/cm^(2)).In battery cycling tests,the addition of 1wt%N,P/RC@Pb simulated battery life of 1834 and the blank battery life of 837.In the capacity test,the N,P/RC@Pb battery has a capacity of 240.9 mAh,while the blank battery is only 157.8 mAh,an improvement of 53%.N,P/RC@Pb composites are simple and low-cost to prepare,improve the problem of uneven mixing of lead and carbon,effectively inhibit the hydrogen precipitation reaction on carbon,and have potential applications in lead-carbon batteries.
作者
谢发之
张梦
张道德
杨少华
宋恒帅
马钰佳
方亮
邵永刚
XIE Fazhi;ZHANG Meng;ZHANG Daode;YANG Shaohua;SONG Hengshuai;MA Yujia;FANG Liang;SHAO Yonggang(School of Materials and Chemical Engineering,Anhui Jianzhu University,Hefei 230601,China;Anhui Accord Science and Technology Co.,Ltd.,Huangshan 242700,Anhui,China)
出处
《材料导报》
EI
CAS
CSCD
北大核心
2024年第19期1-9,共9页
Materials Reports
基金
安徽省教育厅高校自然科学研究项目(KJ2018ZD049)。