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。

针对该缺陷，本课题提出用tin包覆s正极改善锂硫电池安全性能的方法。

2. 参考文献

(1) Zhang, J.; You, C.; Zhang, W.; Wang, J.; Guo, S.; Yang, R.; Xu, Y. Conductive bridging effect of TiN nanoparticles on the electrochemical performance of TiN@CNT-S composite cathode. Electrochimica Acta 2017, 250, 159-166. (2) Fan, H.; Tang, Q.; Chen, X.; Fan, B.; Chen, S.; Hu, A. Dual-Confined Sulfur Nanoparticles Encapsulated in Hollow TiO2 Spheres Wrapped with Graphene for Lithium-Sulfur Batteries. Chemistry, an Asian journal 2016, 11, 2911-2917. (3) Deng, D.-R.; An, T.-H.; Li, Y.-J.; Wu, Q.-H.; Zheng, M.-S.; Dong, Q.-F. Hollow porous titanium nitride tubes as a cathode electrode for extremely stable Li#8211;S batteries. Journal of Materials Chemistry A 2016, 4, 16184-16190. (4) Zhao, X.; Zhou, Q.; Ming, H.; Adkins, J.; Liu, M.; Su, L.; Zheng, J. Surface nitridation induced high electrochemical performance of Li4Ti5O12 using urea as a nitrogen source. Ionics 2013, 19, 1843-1848. (5) Li, J.; Guo, J.; Deng, J.; Huang, Y. Enhanced electrochemical performance of lithium-sulfur batteries by using mesoporous TiO2 spheres as host materials for sulfur impregnation. Materials Letters 2017, 189, 188-191. (6) Hao, Z.; Yuan, L.; Chen, C.; Xiang, J.; Li, Y.; Huang, Z.; Hu, P.; Huang, Y. TiN as a simple and efficient polysulfide immobilizer for lithium#8211;sulfur batteries. Journal of Materials Chemistry A 2016, 4, 17711-17717. (7) Zhou, T.; Lv, W.; Li, J.; Zhou, G.; Zhao, Y.; Fan, S.; Liu, B.; Li, B.; Kang, F.; Yang, Q.-H. Twinborn TiO2#8211;TiN heterostructures enabling smooth trapping#8211;diffusion#8211;conversion of polysulfides towards ultralong life lithium#8211;sulfur batteries. Energy Environmental Science 2017, 10, 1694-1703. (8) Xie, K.; Han, Y.; Wei, W.; Yu, H.; Zhang, C.; Wang, J.-G.; Lu, W.; Wei, B. Fabrication of a novel TiO2/S composite cathode for high performance lithium#8211;sulfur batteries. RSC Advances 2015, 5, 77348-77353. (9) Wei Seh, Z.; Li, W.; Cha, J. J.; Zheng, G.; Yang, Y.; McDowell, M. T.; Hsu, P. C.; Cui, Y. Sulphur-TiO2 yolk-shell nanoarchitecture with internal void space for long-cycle lithium-sulphur batteries. Nature communications 2013, 4, 1331. (10)苏州大学.一种钛酸锂/氮化钛复合材料的制备方法:中国,CN201010530815.2[P].2011-4-13. (11)重庆文理学院.一种氮化钛材料的制备方法:中国,CN201410121084.4[P].2014-6-18. (12)陕西科技大学.一种颗粒自组装氮化钛材料的制备方法:中国,CN201710415352.7[P].2017-9-15. (13) Zhou, T.; Lv, W.; Li, J.; Zhou, G.; Zhao, Y.; Fan, S.; Liu, B.; Li, B.; Kang, F.; Yang, Q.-H. Twinborn TiO2#8211;TiN heterostructures enabling smooth trapping#8211;diffusion#8211;conversion of polysulfides towards ultralong life lithium#8211;sulfur batteries. Energy Environmental Science 2017, 10, 1694-1703. (14) Kang, W.; Deng, N.; Ju, J.; Li, Q.; Wu, D.; Ma, X.; Li, L.; Naebe, M.; Cheng, B. A review of recent developments in rechargeable lithium-sulfur batteries. Nanoscale 2016, 8, 16541-16588. (15) Ren, Y. X.; Zhao, T. S.; Liu, M.; Wei, L.; Zhang, R. H. High-performance nitrogen-doped titania nanowire decorated carbon cloth electrode for lithium-polysulfide batteries. Electrochimica Acta 2017, 242, 137-145.

3. 毕业设计（论文）进程安排

12.22-1.12 查阅文献，翻译英文文献，开题 3.13-4.28 实验 4.28-5.12 论文中期检查 5.12－5.28 实验总结 5.28－6.5 撰写论文及论文答辩