Excimer Laser-Deposited Na2/3Ni1/4Mn3/4O2 Film Cathode for Stable Sodium-Ion Battery

Abstract

Continued development of lithium-ion batteries is limited by the shortage of Li element. In this situation, the exploration of high-performance sodium-ion batteries is attracting much attention. In this experimental work, Na2/3Ni1/4Mn34O2 film cathode materials were fabricated by excimer laser deposition at different oxygen partial pressures. X-ray diffraction studies and field emission scanning electron microscopy revealed high c-axis orientation and uniform grain distribution, respectively, in the deposited films. Furthermore, after 30 cycles under a current density of 13 mA g−1, the film samples deposited at an oxygen partial pressure of 65 Pa exhibited a high capacity-retention of 91%. The film structure also had a large-current discharge performance, which makes practical applications possible.

Thin-film microbattery fabrication by PLD: a comprehensive mini-review

“…On the contrary, Lin J. et al (2020) analyzed the effect of the pressure of oxygen (p(O 2 ): 35, 50, 65 Pa) during the deposition of Na 2/3 Ni 1/4 Mn 3/4 O 2 (NNMO). Film deposited at higher pressure exhibited higher sodium storage, better capacity and cycling performance (Lin et al, 2022).…”