Position: Associate Professor
Areas of Research Interests
1. Graphene-based materials as anodes for high performance lithium-ion batteries
Ultrathin-shell graphene hollow spheres and porous graphene nanosheets have been designed and synthesized by a simple template assisted method without surfactant and freeze-drying technology, respectively. The as-prepared graphene-based materials exhibit outstanding electrochemical performance as an anode material for lithium-ion batteries. In addition, a new facile approach is proposed to synthesize high-level nitrogen-doped graphene sheets by thermal annealing pristine graphene sheets and low-cost industrial material melamine.
2. Facile Synthesis of Hollow Co3O4-embedded Carbon/Reduced Graphene Oxides Nanocomposites for use as Efficient Electrocatalysts in Oxygen Evolution Reaction
The development of non-noble-metal electrocatalysts that are both efficient and stable is of upmost important for the oxygen evolution reaction (OER) which is employed in renewable-energy technologies. The manuscript reports a novel hybrid nanostructure comprised of hollow Co3O4-embedded carbon/reduced graphene oxides (Co3O4-C/rGO-W) by a facile synthetic route involving the pyrolysis-oxidation of ZIF-67/GO-W. The as-obtained hollow Co3O4-C/rGO-W exhibits rather low overpotential of 382 mV at the current density of 10 mA·cm-2 for OER in 0.1 M KOH and the low Tafel slope of 62 mV/decade. A stable potential of about 1.70 V were maintained up to 36000 s, which outperforms many state-of-the-art Co-based OER electrocatalysts.
3. Heptanuclear Co, Ni and mixed Co-Ni clusters as high-performance water oxidation electrocatalysts
Developing efficient water oxidation catalysts (WOCs) made of earth-abundant elements has attracted extensive attention during recent decades. To achieve overall water splitting, it is essential to develop catalysts with low cost, high catalytic activity, and good stability for water oxidation. This research describes that heptanuclear Co, Ni and mixed Co-Ni clusters can be used as efficient catalysts for oxygen evolution reaction (OER). Compared to the reported molecular water oxidation catalysts, the present catalyst showed comparable activity.
 Jiahui Zhang, Fang Li, Weibin Chen, Changshui Wang, Dandan Cai*, Facile synthesis of hollow Co3O4-embedded carbon/reduced graphene oxides nanocomposites for use as efficient electrocatalysts in oxygen evolution reaction, Electrochimica Acta 300 (2019) 123-130.
 Dandan Cai, Ali Han, Pei-Yu Yang, Yan-Fang Wu, Pingwu Du*, Mohamedally Kurmoo, Ming-Hua Zeng*, Heptanuclear Co, Ni and mixed Co-Ni clusters as high-performance water oxidation electrocatalysts, Electrochimica Acta 249 (2017) 343-352.
 Dandan Cai*, Changshui Wang, Caiyan Shi, Ni Tan, Facile synthesis of N and S co-doped graphene sheets as anode materials for high-performance lithium-ion batteries, Journal of Alloys and Compounds 731 (2018) 235-242.
 Ming-Hua Jiang, Dandan Cai*, Ni Tan, Nitrogen-doped Graphene Sheets Prepared from Different Graphene-Based Precursors as High Capacity Anode Materials for Lithium-Ion Batteries, International Journal of Electrochemical Science 12 (2017) 7154-7165.
 Changshui Wang, Jiahui Zhang, Caiyan Shi, Dandan Cai*, Facile Synthesis of Ni-Co LDH Nanocages with Improved Electrocatalytic Activity for Water Oxidation Reaction, International Journal of Electrochemical Science 12 (2017) 10003-10014.
 Dandan Cai, Dongdong Li, Liang-Xin Ding*, Suqing Wang, Haihui Wang*, Interconnected a-Fe2O3 nanosheet arrays as high-performance anode materials for lithium-ion batteries, Electrochimica Acta 192 (2016) 407-413.
 Dandan Cai, Liang-Xin Ding*, Suqing Wang, Zhong Li, Min Zhu, Haihui Wang*, Facile synthesis of ultrathin-shell graphene hollow spheres for high-performance lithium-ion batteries, Electrochimica Acta 139 (2014) 96-103.
 Dandan Cai, Suqing Wang, Liangxin Ding*, Peichao Lian, Shanqing Zhang, Feng Peng, Haihui Wang*, Superior cycle stability of graphene nanosheets prepared by freeze-drying process as anodes for lithium-ion batteries, Journal of Power Sources 254 (2014) 198-203.
 Dandan Cai, Suqing Wang, Peichao Lian, Xuefeng Zhu, Dongdong Li, Weishen Yang, Haihui Wang*, Superhigh capacity and rate capability of high-level nitrogen-doped graphene sheets as anode materials for lithium-ion batteries, Electrochimica Acta 90 (2013) 492-497.
 Dandan Cai, Peichao Lian, Xuefeng Zhu, Shuzhao Liang, Weishen Yang, Haihui Wang*, High specific capacity of TiO2-graphene nanocomposite as an anode material for lithium-ion batteries in an enlarged potential, Electrochimica Acta 74 (2012) 65-72.
 Dandan Cai, Dongdong Li, Suqing Wang, Xuefeng Zhu, Weishen Yang, Shanqing Zhang, Haihui Wang*, High rate capability of TiO2/nitrogen-doped graphene nanocomposite as an anode material for lithium-ion batteries, Journal of Alloys and Compounds 561 (2013) 54-58.
 Peichao Lian; Dandan Cai, Kangbi Luo, Yu Jia, Yanlin Sun, Haihui Wang*, Preparation and electrochemical properties of (Fe2.5Ti0.5)1.04O4-graphene nanocomposite, Electrochimica Acta 104 (2013) 267-273.
 Linghui Yu, Dandan Cai, Haihui Wang*, Maria-Magdalena Titirici*, Hydrothermal Synthesis of SnO2 and SnO2@C Nanorods and Their Application as Anode Materials for Lithium-Ion Batteries. RSC Advances 38 (2013) 17281-17286.
 Linghui Yu, Dandan Cai, Haihui Wang*, Maria-Magdalena Titirici*, Synthesis of Microspherical LiFePO4-Carbon Composites for Lithium-Ion Batteries. Nanomaterials 3 (2013) 443-452.
 Le Zhang, Suqing Wang, Dandan Cai, Peichao Lian, Xuefeng Zhu, Weishen Yang, Haihui Wang*, Li3V2(PO4)3@C/grapehne composite with improved cycling performance as cathode material for lithium-ion batteries, Electrochimica Acta 91 (2013) 108-113.
 Jingjuan Chen, Suqing Wang, Dandan Cai, Haihui Wang*, Porous SiO2 as a separator to improve the electrochemical performance of spinel LiMn2O4 cathode, Journal of Membrane Science 449 (2014) 169-175.
 Peichao Lian*, Jingyi Wang, Dandan Cai, Liangxin Ding, Qingming Jia, Haihui Wang*, Porous SnO2@C/graphene nanocomposite with 3D carbon conductive network as a superior anode material for lithium-ion batteries, Electrochimica Acta 116 (2014) 103-110.
 Dongdong Li, Liang-Xin Ding*, Suqing Wang, Dandan Cai, Haihui Wang*, Ultrathin and High-Ordered CoO Nanosheet Arrays for Lithium-Ion Batteries with High Cycle Stability and Rate Capability, Journal of Materials Chemistry A 2(2014) 5625-5630.