为提高锂硫电池的循环性能,采用化学沉淀法制备了负载有FeS的介孔碳(MC)复合材料FeS/MC,通过热复合获得了负载S的MC复合材料S/MC和负载S、FeS的MC复合材料SFeS/MC.FeS/MC的SEM照片表明,FeS可充填MC表面的孔洞.N2吸脱附等温线表明,负载FeS后,MC的比表面积大幅下降,但平均孔径增大.XRD谱图表明,当负载FeS的含量达到20wt％时,出现了Fe3S4晶相.电化学性能测试结果表明:负载于MC中的FeS本身没有电化学活性,但它对多硫离子的氧化还原过程有催化作用,提高了电极的可逆性;S-FeS/MC的二次放电比容量保持率高于S/MC的比容量保持率,表现出较轻的“飞梭效应”;S-FeS/MC的二次放电比容量为1 108.8mA·h/g,50次循环容量保持率为43.7％,高于S/MC的容量保持率,表现出较好的循环性能.
参考文献
| [1] | 王维坤;余仲宝;苑克国;王安邦;杨裕生.高比能锂硫电池关键材料的研究[J].化学进展,2011(2):540-547. |
| [2] | ARUMUGAM MANTHIRAM;YONGZHU FU;YU-SHENG SU.Challenges and Prospects of Lithium-Sulfur Batteries[J].Accounts of Chemical Research,20135(5):1125-1134. |
| [3] | SCOTT EVERS;LINDA F. NAZAR.New Approaches for High Energy Density Lithium-Sulfur Battery Cathodes[J].Accounts of Chemical Research,20135(5):1135-1143. |
| [4] | Yuriy V. Mikhaylik;James R. Akridge.Polysulfide Shuttle Study in the li/S Battery System[J].Journal of the Electrochemical Society,200411(11):A1969-A1976. |
| [5] | Sheng S. Zhang.New insight into liquid electrolyte of rechargeable lithium/sulfur battery[J].Electrochimica Acta,2013:226-230. |
| [6] | Xiulei Ji;Kyu Tae Lee;Linda F. Nazar.A highly ordered nanostructured carbon-sulphur cathode for lithium-sulphur batteries[J].Nature Materials,20096(6):500-506. |
| [7] | C. Lai;X. P. Gao;B. Zhang.Synthesis and Electrochemical Performance of Sulfur/Highly Porous Carbon Composites[J].The journal of physical chemistry, C. Nanomaterials and interfaces,200911(11):4712-4716. |
| [8] | Wook Ahn;Kwang-Bum Kim;Kyu-Nam Jung;Kyoung-Hee Shin;Chang-Soojin.Synthesis and electrochemical properties of a sulfur-multi walled carbon nanotubes composite as a cathode material for lithium sulfur batteries[J].JOURNAL OF POWER SOURCES,2012Mar.15(Mar.15):394-399. |
| [9] | Sang-Eun Cheon;Soo-Seok Choi;Ji-Seong Han.Capacity Fading Mechanisms on Cycling a High-Capacity Secondary Sulfur Cathode[J].Journal of the Electrochemical Society,200412(12):A2067-A2073. |
| [10] | Ling Fei;Qianglu Lin;Bin Yuan.Reduced Graphene Oxide Wrapped FeS Nanocomposite for Lithium-Ion Battery Anode with Improved Performance[J].ACS applied materials & interfaces,201311(11):5330-5335. |
| [11] | 冯旭;何向明;蒲薇华;万春荣;姜长印.锂电池正极材料FeS2[J].化学进展,2008(2):396-404. |
| [12] | 杨永珍;刘伟峰;郭明聪;刘旭光;许并社.MnO_2/CMSs复合材料的制备及其电化学性能[J].复合材料学报,2011(4):149-155. |
| [13] | 刘慧;岳鑫;刘景东.蒙脱石对介孔炭复合硫正极性能的影响[J].电池,2012(4):186-188. |
| [14] | 陈龙;刘景东;张诗群.负载ZnS的介孔炭复合硫正极材料的制备及性能研究[J].无机材料学报,2013(10):1127-1131. |
| [15] | J. D. Liu;S. Q. Zhang;S. B. Yang.Phosphazene groups modified sulfur composites as active cathode materials for rechargeable lithium/sulfur batteries[J].Ionics,201311(11):1477-1482. |
| [16] | 袁勋;柳玉英;禚淑萍;邢伟;孙运泉;代晓东;刘欣梅;阎子峰.有序介孔炭的合成及液相有机大分子吸附性能研究[J].化学学报,2007(17):1814-1820. |
| [17] | D. Zhang;Y.J. Mai;J.Y. Xiang;X.H. Xia;Y.Q. Qiao;J.P. Tu.FeS_2/C composite as an anode for lithium ion batteries with enhanced reversible capacity[J].Journal of Power Sources,2012Nov.1(Nov.1):229-235. |
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