TY - JOUR
T1 - Synergistic regulation of nickel doping/hierarchical structure in cobalt sulfide for high performance zinc-air battery
AU - Wang, Jie
AU - Xu, Jinxiao
AU - Guo, Xuyun
AU - Shen, Tao
AU - Xuan, Cuijuan
AU - Tian, Baoling
AU - Wen, Zhaorui
AU - Zhu, Ye
AU - Wang, Deli
N1 - Funding Information:
This work is subsidized by the Research Foundation for Distinguished Scholars of Qingdao Agricultural University (665-1119008), the Opening Fund of Key Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education (2020JYBKF04), the Hong Kong Research Grants Council through the Early Career Scheme (Project No. 25301617) and the Hong Kong Polytechnic University grant (Project No. ZVRP). The authors also thank Dr. Wei Lu for optimizing the TEM equipment and the help of the Central Laboratory of Qingdao Agriculture University in material characterization.
Funding Information:
This work is subsidized by the Research Foundation for Distinguished Scholars of Qingdao Agricultural University ( 665-1119008 ), the Opening Fund of Key Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education ( 2020JYBKF04 ), the Hong Kong Research Grants Council through the Early Career Scheme (Project No. 25301617 ) and the Hong Kong Polytechnic University grant (Project No. ZVRP ). The authors also thank Dr. Wei Lu for optimizing the TEM equipment and the help of the Central Laboratory of Qingdao Agriculture University in material characterization.
Publisher Copyright:
© 2021
PY - 2021/12/5
Y1 - 2021/12/5
N2 - Reduced-graphene-nanoribbon supported nickel doped Co9S8 spheres (Ni-Co9S8/rGN) have been successfully constructed. The hierarchical structured sphere assembles by spindle-type nanorods features high surface area and good hydrophilicity property. Excellent OER/ORR activities and long-term stabilities are obtained on Ni-Co9S8/rGN relative to Pt/C and RuO2. Density functional theory calculations demonstrate that nickel dopants in Co9S8 structure effectively optimizes the adsorption properties at the rate-determining steps. Therefore, the synergistic regulation between the rGN covered hierarchical structure and nickel dopants by promoting the intrinsic ORR/OER properties, electrical conductivity, and mass transfer is responsible to the superior catalytic performance. Moreover, as a bi-functional catalyst for liquid and flexible Zn–air batteries, Ni-Co9S8/rGN based battery exhibits excellent battery performance, especially high power density, superior rate performance and long-term cycling stability, providing a new vision for the preparation of high-efficiency catalysts in energy conversion.
AB - Reduced-graphene-nanoribbon supported nickel doped Co9S8 spheres (Ni-Co9S8/rGN) have been successfully constructed. The hierarchical structured sphere assembles by spindle-type nanorods features high surface area and good hydrophilicity property. Excellent OER/ORR activities and long-term stabilities are obtained on Ni-Co9S8/rGN relative to Pt/C and RuO2. Density functional theory calculations demonstrate that nickel dopants in Co9S8 structure effectively optimizes the adsorption properties at the rate-determining steps. Therefore, the synergistic regulation between the rGN covered hierarchical structure and nickel dopants by promoting the intrinsic ORR/OER properties, electrical conductivity, and mass transfer is responsible to the superior catalytic performance. Moreover, as a bi-functional catalyst for liquid and flexible Zn–air batteries, Ni-Co9S8/rGN based battery exhibits excellent battery performance, especially high power density, superior rate performance and long-term cycling stability, providing a new vision for the preparation of high-efficiency catalysts in energy conversion.
KW - Hierarchical porous structure
KW - Nickel doped CoS
KW - Oxygen reduction/evolution reaction
KW - Synergistic regulation
KW - Zn-air battery
UR - http://www.scopus.com/inward/record.url?scp=85110654728&partnerID=8YFLogxK
U2 - 10.1016/j.apcatb.2021.120539
DO - 10.1016/j.apcatb.2021.120539
M3 - Journal article
AN - SCOPUS:85110654728
SN - 0926-3373
VL - 298
JO - Applied Catalysis B: Environmental
JF - Applied Catalysis B: Environmental
M1 - 120539
ER -