长期从事阻燃材料，聚合物/黏土纳米复合材料的研究工作。目前主要的研究包括新型纳米复合阻燃剂、不同拓扑结构的聚合物纳米复合阻燃体系、高效的二维材料剥离方法，一体化膨胀阻燃剂等方面的研究。在纳米复合阻燃剂制备过程中，始终遵循仅以水作为溶剂或无溶剂的绿色和可持续合成理念。曾兼任中国石化联合会阻燃专委会副秘书长。现兼任中国应急管理学会应急能力评估工作委员会副主任委员。
       现已发表SCI论文20余篇，申请专利10余项，授权8项，主编/参编专著2部。
       科研项目（主持）：
       国家自然科学基金青年基金，新型纳米复合阻燃剂蒙脱土-三聚氰胺氰尿酸盐的制备与研究（51303012）已结题，
       普陀宗乘之庙油饰彩画保护工程地仗物化性能总体分析，
       阻燃带卷烟纸中新型阻燃材料的研究等项目。

2001.9-2005.6 北京理工大学材料学院，高分子材料科学与工程，工学学士学位
2005.9-2010.1 北京理工大学材料学院，材料学，工学博士学位

2010.3-2011.12 School of Chemistry, Marquette University, 博士后
2012.3-2019.6 北京理工大学材料学院，讲师，硕士生导师
2019.7-至今 北京理工大学材料学院，副教授，硕士生导师

阻燃材料，聚合物纳米复合材料，二维材料剥离

1. Peifan Qin, Deqi Yi*, Jianwei Hao, Xinming Ye, Ming Gao, Tinglu Song. Fabrication of melamine trimetaphosphate 2D supermolecule and its superior performance on flame retardancy, mechanical and dielectric properties of epoxy resin. Composites Part B. 225, 109269, 2021.
2. Qin Peifan, Yi Deqi*, Jianwei Hao. Fast prepare exfoliated montmorillonite water suspension with assistance of melamine cyanurate and the superlattice obtained by self-assembly. Polym. Adv. Technol.2021, online.
3. Qin Peifan, Yi Deqi*, Jianwei Hao. Bi-layer molybdenum disulfide obtains from molybdenum disulfide-melamine cyanurate superlattice with a thermal shock.Advanced Powder Technology. 2021, online.
4. Qin Peifan, Yi Deqi*, Jun Xing, Mingzhu Zhou, Jianwei Hao. Study on flame retardancy of ammonium polyphosphate/montmorillonite nanocompound coated cellulose paper and its application as surface flame retarded treatment for polypropylene. J. Therm. Anal. Calorim. 2021, online.
5. Zhang Lichen, Yi Deqi*, Hao Jianwei, Gao Ming. One-step treated wood by using natural source phytic acid and uracil for enhanced mechanical properties and flame retardancy. Polym. Adv. Technol. 2021, 32(3), 1176.
6. Zhang Lichen, Yi Deqi*, Hao Jianwei. Poly(diallyldimethylammonium) and polyphosphate polyelectrolyte complex as flame retardant for char-forming epoxy resins. Journal of Fire Science. 2020,38(4),333-347.
7. Qin Peifan, Yi Deqi*, Meng Qi, Sun Aijun, Sun Jingqi, Zhang Zengjun, Hao Jianwei. Study and Restoration of the Yi Ma Wu Hui Layer of the Ancient Coating on the Putuo Zongcheng Temple. International Journal of Architectural Heritage. 2020, online.
8. Zhang Lichen, Yi Deqi*, Hao Jianwei. Poly (diallyldimethylammonium) and polyphosphate polyelectrolyte complexes as an all-in-one flame retardant for polypropylene. Polym. Adv. Technol. 2020,31(2), 260-272.
9. Min Zhao, Deqi Yi*, Rongjie Yang. Enhanced mechanical properties and fire retardancy of polyamide 6 nanocomposites based on interdigitated crystalline montmorillonite-melamine cyanurate. Journal of Applied Polymer Science. 2018, 135(13), 46039.
10. Min Zhao, Deqi Yi*, Giovanni Camino, Alberto Frache, Rongjie Yang. Interdigitated crystalline MMT-MCA: Preparation and characterization. Polym. Adv. Technol. Polym. Adv. Technol. 2018, 29, 22-29.
11. Min Zhao, Deqi Yi*, Giovanni Camino, Alberto Frache, Rongjie Yang. Interdigitated crystalline MMT-MCA in polyamide 6. RSC Advances. 2017, 7(2), 861-869.
12. Deqi Yi*, Huixin Yang, Min Zhao, Le Huang, Giovanni Camino, Alberto Frache, Rongjie Yang. A novel, low surface charge density, anionically modified montmorillonite for polymer nanocomposites. RSC Advances. 2017, 7(10), 5980-5988. 代表性著作： 杨荣杰, 仪德启. 聚磷酸铵. 科学出版社. 2015.