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主要从事超级电容器、锂离子、锌离子电池材料设计制备及新能源电池的研究。部分研究结果如下：
在镍网基底上得到了结构和形貌可控的NiCo2O4/C纳米片阵列（Chemical Communications, 2014, 50(63):8697）等并研究了其在超级电容器方面的应用，研究了阵列的可控制备、相转变和电化学性能测试。提出了在弱还原气体钴酸镍的相转变机理，下图即为钴酸镍在乙炔气体下被还原过程中发生的 化学反应过程和拓扑转变分析。
合成得到了结构可控的CoO/C纳米线阵列（Journal of Materials Chemistry A, 2014, 2(30):11776-11783），其中碳壳层大部分为晶态碳层，极大提升了电极材料的导电性和电化学性能。
- 指导本科生国家级大创项目2项，2万
- 参与，高能重离子碰撞中重味夸克喷注的产生，国家自然科学基金，2019-01-01--2021-12-31，22万；
- 主持在研，大功率充放电下高能量密度Co3O4/CoN核壳纳米线阵列复合材料的制备与研究，中央高校科研业务费，2018-01-01--，6万；
- 主持在研，高温相LiCoO2纳米片阵列的低温熔盐制备及其倍率和循环性能研究，国家自然科学基金，2019-01-01--2021-12-31，24万；
- Ting Xiao, Xiaoyan Hu, Bojun Heng, Wei Huang, Wei Tao, Hai Wang, YiwenTang, X.Tan, X. Huang. Journal of Alloys and Compounds, 2013, 549, 147-151.
- Bojun Heng, Chen Qing, Daming Sun, Bixiao Wang, Hai Wang and Yiwen Tang. RSC Advances., 2013, 3, 15719-15726.
- Ling Wang, Hai Wang, Yiwen Tang, et al. Controllable shell thickness of Co/CoO core-shell structure on 3D nickel foam with high performance supercapacitors[J]. Journal of Alloys & Compounds, 2017, 726.
- A.A. Aref, A.A. Muneerah, Daming Sun, Hai Wang, Chen Qing, Yiwen Tang. Materials Science in Semiconductor Processing, 2015, 29, 261-271.
- Chong Wang , Lingxia Wu , Hai Wang , Wenhua Zuo , Yuanyuan Li , and Jinping Liu. Adv. Funct. Mater. 2015, 25, 3524–3533.
- Hai Wang, Chong Wang, Chen Qing, Daming Sun, Bixiao Wang, Gan Qu, Miao Sun and Yiwen Tang, Electrochimica Acta, 2015, 174, 1104-1112.
- Hai Wang, Junling Guo, Chen Qing, Daming Sun, Bixiao Wang and Yiwen Tang, Chemical Communications, 2014, 50, 8697-8700.
- Hai Wang, Chen Qing, Junling Guo, A. A. Aref, Daming Sun, Bixiao Wang and Yiwen Tang, Journal of Materials Chemistry A, 2014, 2, 11776-11783.
- Hai Wang, Zhonglong Xiong, Sanmei Jin & Chen Qing, Carbon growth process on the cobalt-based oxides, Fullerenes, Nanotubes and Carbon Nanostructures, 2019, https://doi.org/10.1080/1536383X.2019.1653856.