Improved lithium storage properties of Co3O4 nanoparticles via laser irradiation treatment

Annealing atmosphere effect on the resistive switching and magnetic properties of spinel Co3O4 thin films prepared by a sol–gel technique

“…The nitrogen annealed Co 3 O 4 lms reduce the crystallinity and bring numerous grain boundaries, and generate the loss of oxygen atoms in the surface of Co 3 O 4 and thus introduce oxygen vacancies. 53,57 XPS results are in good agreement with XRD and SEM analysis.…”

“…The peaks can be tted by three peaks centered at 530.1, 531.6, and 533.2 eV, namely O L , O V , O C , respectively, which corresponds to lattice oxygen, oxygen vacancies, and chemisorbed oxygen in decient regions, respectively. 53,56,57 The result shows that the amounts of oxygen vacancies are 21.1%, 30.3%, and 32.1% in oxygen-annealing, air-annealing, and nitrogen-annealing Co 3 O 4 lms, respectively. These results revealed that oxygen vacancies concentration or area of defect is higher in nitrogen annealed Co 3 O 4 lms as compared to oxygen and air annealed stacks.…”

“…74-2120), except for Pt/Ti/SiO 2 /Si substrate. 53 There is no evidence of any other impurity peaks from Co and CoO, indicating the pure crystallization of the Co 3 O 4 lms. In addition, compared with nitrogen annealed Co 3 O 4 lm, oxygen and air annealed Co 3 O 4 lms show higher peak intensity and narrower full width at half maximum (FWHM).…”

Oxygen vacancies enhance lithium storage performance in ultralong vanadium pentoxide nanobelt cathodes

“…Taking metal oxide-based electrode materials as an example, the existence of oxygen vacancies leads to the delocalization of electron distribution and promotion of electron excitation, which are favorable for the conductivity improvement and charge transportation. In our previous works, facile approaches have been developed to controllably generate oxygen vacancies in metal oxide-based anodes, including laser irradiation treatment and chemical reduction in solution [38,39]. The results show that an optimized oxygen deficiency is important to achieve well-balanced electronic/ionic transport and thus boost the ion storage.…”

Chemical reduction-induced oxygen deficiency in Co3O4 nanocubes as advanced anodes for lithium ion batteries

“…The nanoscale defects can promote the charge transport kinetics and retain the integrity of the electrode structure, thus enhancing the electrochemical activity [29,30]. In our previous works, different methods have been developed, for example, laser irradiation treatment [34], gas phase annealing [35], and solution phase reduction [36], to modify the defect chemistry and interfacial structure in Co 3 O 4 anodes. The results suggest that the oxygen vacancies and surface CoO layer are simultaneously formed in the modified Co 3 O 4 nanostructure, leading to an improved electrochemical performance.…”