Defect engineering is an effective means to improve the surface properties and electronic structure of nanomaterials. However, there are still challenges in how to introduce double defects into nanomaterials in a simple way. The research group of Shi Xuerong and Xu Shusheng of Shanghai University of Engineering Science proposed a simple two-step solvothermal method to introduce Fe dopants and S vacancies into MOFs-derived bimetallic nickel-cobalt sulfide composites, and the prepared Fe-NiCo-S samples had excellent charge storage kinetics and activity, and the fe-NiCo-S nanosheets obtained had ultra-high specific capacitance (2779.6 F g-1@1 A g-1) and excellent magnification performance. The research results were published in ACS Appl. Mater. Interfaces (TOP Journal of 2020 Basic Edition Engineering Technology Category I, IF=9.229, DOI:10.1021/acsami.1c15824, SCI Division, Chinese Academy of Sciences). Graduate student Liu Ruiqi is the first author, and Shi Xuerong and Xu Shusheng are co-corresponding authors.
Synthesis of polymetallic sulphides with bi-defects and their applications in supercapacitors and electrocatalytic oxygen evolution reactions
In this study, using Co(OH)2 as a template, the high load NiCo-MOF nanosheet (load amount up to 16.1 mg/cm2) and its surface capacitance up to 5.84 F/cm2 @1 mA/cm2 (Fig. 2) can be obtained by using Co(OH)2 as a template, and the assembled supercapacitor can obtain a maximum energy density of 40 Wh/kg The capacitance retention rate after 10,000 cycles of charge and discharge is as high as 97.7%. The research results were published in Applied Surface Science under the title "Template-controlled in-situ growing of NiCo-MOF nanosheets on Ni foam with mixed linkers for high performance asymmetric supercapacitors" (Department of Chinese Academy of Sciences SCI Division 2020 Basic Edition Engineering Technology Category II Top Journal, IF=6.707, DOI:10.1016/j.apsusc.2021.151344). Graduate student Huang Simin is the first author, and Shi Xuerong and Xu Shusheng are co-corresponding authors.
A, b: NiCo-(PTA)0.8 (BTC)0.2 SEM, TEM morphology characterization c, d: NiCo-(PTA)0.8 (BTC)0.2 charge and discharge performance and supercapacitor performance
In addition, the group has recently published a number of academic papers in high-level journals in related fields, including: Dalton Transactions (DOI: 10.1039/d1dt00934f, Region II journal, IF=4.39); Nanotechnology (DOI: 10.1088/1361-6528/ac21eb, Top Journals in Region II, IF=3.874); Electrochimica Acta (DOI: 10.1016/j.electacta.2020.136124, Region II Top Journal, IF=6.901).
Source: Shanghai University of Engineering Science
Links to papers
https://pubs.acs.org/doi/10.1021/acsami.1c15824
https://www.sciencedirect.com/science/article/abs/pii/S0169433221023977