欢迎登录材料期刊网

材料期刊网

高级检索

本文研究了球磨时间对天然球形石墨储钠性能的影响.结果表明,随球磨时间延长,材料由椭球状变为薄片状;晶化程度降低,无定形程度增强,平均晶面间距增大,晶体尺寸减小.编号为Pt0、Pt10、Pt20和Pt30的样品首次放电容量分别为17.2 mAh/g、62.1 mAh/g、128.4 mAh/g、120.1 mAh/g;20次循环以后可逆容量分别为13.9 mAh/g、64.6 mAh/g、114.3 mAh/g、101.6 mAh/g.当电流密度为80mA/g时,Pt20可逆容量达到96.3 mAh/g,材料电化学性能提高的原因主要是:球磨时间延长产生更多的表面和缺陷,为钠离子的嵌入(或吸附)构筑更多的活性点.

参考文献

[1] Chemical Reviews Group.What Are Batteries,Fuel Cells,and Supercapacitors?[J].Chemical Reviews,200410(10):4245-4269.
[2] Bruce Dunn;Haresh Kamath;Jean-Marie Tarascon.Electrical Energy Storage for the Grid: A Battery of Choices[J].Science,2011Nov.18 TN.6058(Nov.18 TN.6058):928-935.
[3] 胡彬 .钛基钠离子电池负极材料制备与性能研究[D].上海交通大学,2014.
[4] 李慧;吴川;吴锋;白莹.钠离子电池:储能电池的一种新选择[J].化学学报,2014(1):21-29.
[5] M. Armand;J.-M. Tarascon.Building better batteries[J].Nature,20087179(7179):652-657.
[6] Liubin Song;Zhongliang Xiao;Ying Zhou.Thermo-electrochemical study on LiMn_2O_4 lithium-ion cells during charge-discharge process[J].Electrochimica Acta,2013:611-616.
[7] M. Rosa Palacin.Recent advances in rechargeable battery materials: a chemist's perspective[J].Chemical Society Reviews,20099(9):2565-2575.
[8] 何菡娜;王海燕;唐有根;刘又年.钠离子电池负极材料[J].化学进展,2014(4):572-581.
[9] 金翼;孙信;余彦;丁楚雄;陈春华;官亦标.钠离子储能电池关键材料[J].化学进展,2014(4):582-591.
[10] 钱江锋;高学平;杨汉西.电化学储钠材料的研究进展[J].电化学,2013(6):523-529.
[11] 许婧;杨德志;廖小珍;何雨石;马紫峰.还原氧化石墨烯/TiO2复合材料在钠离子电池中的电化学性能[J].物理化学学报,2015(5):913-919.
[12] 黄宗令;王丽平;牟成旭;李晶泽.对苯二甲酸镁作为钠离子电池的有机负极材料[J].物理化学学报,2014(10):1787-1793.
[13] D. A. Stevens;J. R. Dahn.The Mechanisms of Lithium and Sodium Insertion in Carbon Materials[J].Journal of the Electrochemical Society,20018(8):A803-A811.
[14] V.L. Chevrier;G. Ceder.Challenges for Na-ion Negative Electrodes[J].Journal of the Electrochemical Society,20119(9):A1011-A1014.
[15] Yun-Xiao Wang;Shu-Lei Chou;Hua-Kun Liu.Reduced graphene oxide with superior cycling stability and rate capability for sodium storage[J].Carbon: An International Journal Sponsored by the American Carbon Society,2013:202-208.
[16] P. Thomas;D. Billaud.Effect of mechanical grinding of pitch-based carbon fibers and graphite on their electrochemical sodium insertion properties[J].Electrochimica Acta,20001(1):39-47.
上一张 下一张
上一张 下一张
计量
  • 下载量()
  • 访问量()
文章评分
  • 您的评分:
  • 1
    0%
  • 2
    0%
  • 3
    0%
  • 4
    0%
  • 5
    0%