摘要
利用循环伏安和恒电流充放电测试,结合扫描电镜观测,研究了水性黏结剂海藻酸钠和果胶酸钠对石墨负极电化学性能的影响.结果表明,石墨负极在这两种黏结剂中均可以进行有效的嵌锂脱锂循环,且电化学循环性能较好,50次循环后可逆比容量损失不超过5%.两种水性黏结剂在改善石墨电极的嵌脱锂循环性能方面具有较好的发展前景.
The effect of water-borne binders sodium alginate and pectin sodium on the electro- chemical behavior of graphite cathode was investigated by means of cycling voltammetry and galvanostatic charge-discharge test as well as scanning electron microscopic observation. Results show that graphite cathode is able to undergo lithium intercalation and delithiation cycling in both binders. Besides, the graphite cathode possesses good electrochemical performance, showing a loss of capacity of below 5 % after 50 cycles. This implies that the two kinds of water-borne binders may have promising application in improving lithium intercalation and delithiation cycling performance of graphite cathode.
出处
《化学研究》
CAS
2012年第5期80-84,共5页
Chemical Research
基金
河南省教育厅自然科学基金资助项目(2011B150028)
商丘师范学院2011年度青年科研基金资助项目(2011QN16)
关键词
水性黏结剂
海藻酸钠
果胶酸钠
锂离子电池
石墨负极
电化学性能
water-borne binder
sodium alginate
pectin sodium
lithium-ion battery
graphitecathode
electrochemical performance
