1. 毕业设计（论文）的内容和要求

在当今全球性能源紧缺的大背景下,锂离子电池的发展情况是研究领域的热点问题，锂-硫电池的研究又是其热门分支。

虽然锂-硫电池有很多优势，例如硫元素廉价丰富，电池理论容量高，但是我们也无法忽略锂-硫电池的劣势，它的劣势在于硫元素导电性不强，同时在充放电过程中多硫化物容易在电介质中溶解而造成质量损失以及硫放电过程中体积膨胀从而使电极材料在充放电过程中坍塌影响循环寿命。

针对这一问题，本课题以碳纤维上生长的zif-67阵列作为前驱体碳化，将其硒化后负载硫化硒，一方面利用阵列本身的co、se元素作为吸附多硫化物的位点抑制穿梭效应，一方面利用硫化硒替代硫单质提高活性物质的导电性能，从而获得比较好的电化学性能。

2. 参考文献

[1] 吴宇平, 万春荣, 姜长印. 锂离子二次电池 [M]. 北京: 化学工业出版社, 2002. [2] Tarascon J M, Armand M. Issues and Challenges Facing Rechargeable Lithium Batteries[J]. Nature. 2001, 414(6861): 359-367. [3] 何曼君，陈维孝，董西侠. 高分子物理[M]. 上海:复旦大学出版社, 1990 [4] M. Armand, J. M. Tarascon. Building better batteries [J], Nature, 2008, 451, 652. [5] Mentbayeva A, Belgibayeva A, Umirov N, et al. High Performance Freestanding Composite Cathode for Lithium-Sulfur Batteries[J]. Electrochimica Acta. 2016, 217: 242-248. [6] Bruce P G, Freunberger S A, Hardwick L J, et al. Li-O2 and Li-S Batteries with High Energy Storage[J]. Nature Materials. 2012, 11(1): 19-29. [7] Kang W, Deng N, Ju J, et al. A Review of Recent Developments in Rechargeable Lithium-Sulfur Batteries.[J]. Nanoscale. 2016, 8(37). [8] Mikhaylik Y V, Akridge J R. Polysulfide Shuttle Study in The Li/S Battery System[J]. Journal of the Electrochemical Society. 2004, 151(11): A1969-A1976. [9] Ji X, Nazar L F. Advances in Li-S Batteries[J]. Journal of Materials Chemistry. 2010, 20(44): 9821-9826. [10] Ji X, Lee K T, Nazar L F. A Highly Ordered Nanostructured Carbon-Sulphur Cathode for Lithium-Sulphur Batteries[J]. Nature Materials. 2009, 8(6): 500-506. [11] Xu D., Chao D., Wang H., et. al. Flexible Quasi-Solid-State Sodium-Ion Capacitors Developed Using 2D Metal-Organic-Framework Array as Reactor[J]. Advanced Energy Materials. 2018,8(13): 1702769-1702780. [12] Chen T., Li S., Wen J., et. al. Rational Construction of Hollow Core-Branch CoSe2 Nanoarrays for High-Performance Asymmetric Supercapacitor and Efficient Oxygen Evolution[J]. Small. 2018, 14(5): 1700979-1700987. [13] Li Z., Zhang J., Guan B., et. al. Mesoporous Carbon@Titanium Nitride Hollow Spheres as an Efficient SeS2 Host for Advanced Li-SeS2 Batteries[J]. Angewandte Chemie. 2018, 56(50): 16003-16007. [14] Xu G., Sun H., Luo C., et. al. Solid-State Lithium/Selenium-Sulfur Chemistry Enabled via a Robust Solid-Electrolyte Interphase[J]. Advanced Energy Materials. 2018: 1802235-1802249. [15] Suriyakumar S., Kanagaray M., Kathiresan M., et. al. Metal-organic frameworks based membrane as a permselective separator for lithium-sulfur batteries[J]. Electrochimica Acta. 2018: 265:151-159.

3. 毕业设计（论文）进程安排

起讫日期 设计（论文）各阶段工作内容 12.21-1.18 查阅文献，翻译英文文献，开题 1.18-4.28 实验 4.28-5.12 论文中期检查 5.12－5.28 实验总结 5.28－6.14 撰写论文及论文答辩