采用球磨混合及热复合法制备硫/BP2000复合正极材料(含硫量42％(质量分数)),分别以 PT-FE、明胶和 PEO 作为粘结剂,考察了不同粘结剂对锂-硫电池电化学性能的影响.采用热重分析(TGA)、X射线衍射(XRD)、循环伏安法(CV)和恒流充放电表征其物化性能和电化学性能.结果表明,明胶和 PT-FE对于提高硫正极的电化学性能和维持硫正极的循环稳定性具有积极意义.其中,在0．2 C 充放电时, PTFE 作粘结剂的电池循环50次后比容量保持741．2 mAh/g,明胶作粘结剂的电池循环50次后放电比容量保持788 mAh/g(按单质硫的质量计算).
Ball milling in combination with heat treatment was used to prepare S/C composite cathode materials (sulfur containing was 42wt%).In this paper,the effects of different binders PTFE,gelatin and PEO for lithi-um-sulfur battery were studied respectively.Cyclic voltammetry (CV)and constant current charge-discharge characterized the electrochemical properties.The results showed that gelatin and PTFE as a binder presented positive evaluations for the electrochemical performance of sulfur positive electrode.In the experiment,the dis-charge capacity retains 741.2 mAh/g (based on sulfur weight)after 50 for PTFE at 0.2 C.Gelatin as a binder, the discharge capacity was 788 mAh/g after the 50 cycle for the cycles at the current of 0.2 C.
参考文献
| [1] | 姚真东,魏巍,王久林,杨军,努丽燕娜.锂硫二次电池正极研究进展[J].物理化学学报,2011(05):1005-1016. |
| [2] | 李翠丽,单忠强,田建华.基体碳材料对锂硫电池性能影响的研究[J].功能材料,2012(07):880-883. |
| [3] | L. J. Xue;J. X. Li;S. Q. Hu;M. X. Zhang;Y. H. Zhou;C. M. Zhan .Anthracene based organodisulfide positive active materials for lithium secondary battery[J].Electrochemistry communications,2003(10):903-906. |
| [4] | 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,2012(Mar.15):394-399. |
| [5] | 宋晔,蒋龙飞,戚卫星,路超,朱绪飞,杭启明,朱信华.多孔氧化铝模板结合sol-gel旋转涂敷法制备PZT纳米管[J].功能材料,2012(12):1605-1609. |
| [6] | Akitoshi Hayashi;Takamasa Ohtomo;Fuminori Mizuno;Kiyoharu Tadanaga;Masahiro Tatsumisago .All-solid-state Li/S batteries with highly conductive glass-ceramic electrolytes[J].Electrochemistry communications,2003(8):701-705. |
| [7] | Yamin H;Gorenshtein A;Penciner J et al.Lithium sul-fur battery oxidation/reduction mechanisms of polysul-fides in THF solutions[J].Journal of Electrochemical So-ciety,1988,135:1045-1048. |
| [8] | Chengdu Liang;Nancy J. Dudney;Jane Y. Howe .Hierarchically Structured Sulfur/Carbon Nanocomposite Material for High-Energy Lithium Battery[J].Chemistry of Materials: A Publication of the American Chemistry Society,2009(19):4724-4730. |
| [9] | 董全峰,王翀,郑明森.锂硫电池关键材料研究进展与展望[J].化学进展,2011(02):533-539. |
| [10] | Wang Q;Wang W K;Huang Y Q et al.Improve rate ca-pability of the sulfur cathode using a gelatin binder[J].Journal of the Electrochemical Society,2011,158(06):A775-A779. |
| [11] | Min He;Wu-Xing Zhang;Li-Xia Yuan .Enhanced Cyclability for Sulfur Cathode Achieved by a Water-Soluble Binder[J].The journal of physical chemistry, C. Nanomaterials and interfaces,2011(31):15703-15709. |
| [12] | Zhi Wei Seh;Qiarifan Zhang;Weiyang Li .Stable cycling of lithium sulfide cathodes through strong affinity with a bifunctional binder[J].Chemical science,2013(9):3673-3677. |
| [13] | Kim N L;Lee C B;Seo J M et al.Correlation between positive-electrode morphology and sulfur utilization in lithium-sulfur battery[J].Journal of Power Sources,2004,132(1-2):209-212. |
| [14] | Mumin Rao;Xiangyun Song;Elton J. Cairns .Nano-carbon/sulfur composite cathode materials with carbon nanofiber as electrical conductor for advanced secondary lithium/sulfur cells[J].Journal of Power Sources,2012(May 1):474-478. |
| [15] | Shizhao Xiong;Kai Xie;Yan Diao .Oxidation process of polysulfides in charge process for lithium-sulfur batteries[J].Ionics,2012(9):867-872. |
| [16] | Kim N I;Lee C B;Seo J M et al.Correlation between positive-electrode morphology and sulfur utilization in sulfur-lithium battery[J].Journal of Power Sources,2004,132:209-212. |
| [17] | Sun J;Huang Y Q;Wang W K et al.Application of gela-tion as a binder for the sulfur cathode in lithium-sulfur batteries[J].Journal of Electrochimica Acta,2008,53:7084-7088. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%