Influence of electrode fabrication process on nanocrystalline tin oxide electrochemical behaviour for high voltage SnO2/LNMO full cell Li-ion battery

Versaci, Daniele; Kastrinaki, Georgia; Ganas, George; Zarvalis, Dimitrios; Karagiannakis, George; Amici, Julia; Francia, Carlotta; Bodoardo, Silvia

doi:10.1016/j.est.2023.107357

Cited by 3 publications

(1 citation statement)

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“…The XRD spectra of the three cathodes (Figure 5e) show similar peaks, corresponding to Li 2 O 2 , the typical discharge product of Li-O 2 cells, and LiOH, confirming our previous hypothesis regarding DMSO decomposition. The real difference between the three spectra regards the peaks shapes; while the peaks of the bare Li cell cathode are quite narrow, the ones of the two protected Li cells are wider, which could actually confirm the presence of much smaller crystals with a reduced degree of crystallinity [53], confirming what can be observed through FESEM. Interestingly, for the CHMA M MW -protected Li cell, the discharge products layer on the cathode surface seems much thicker (Figure 5d), while at the same time the discharge plateau is slightly lower than for the other two cells (Figure 5a), denoting a higher cell polarization.…”

Section: Lithium-oxygen Cells Performancesupporting

confidence: 59%

Efficient Biorenewable Membranes in Lithium-Oxygen Batteries

et al. 2023

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Lithium-oxygen batteries, with their very high energy density (3500 Wh kg−1), could represent a real breakthrough in the envisioned strategies towards more efficient energy storage solutions for a less and less carbonated energy mix. However, the problems associated with this technology are numerous. A first one is linked to the high reactivity of the lithium metal anode, while a second one is linked to the highly oxidative environment created by the cell’s O2 saturation. Keeping in mind the necessity for greener materials in future energy storage solutions, in this work an innovative lithium protective membrane is prepared based on chitosan, a polysaccharide obtained from the deacetylation reaction of chitin. Chitosan was methacrylated through a simple, one-step reaction in water and then cross-linked by UV-induced radical polymerization. The obtained membranes were successively activated in liquid electrolyte and used as a lithium protection layer. The cells prepared with protected lithium were able to reach a higher full discharge capacity, and the chitosan’s ability to slow down degradation processes was verified by post-mortem analyses. Moreover, in long cycling conditions, the protected lithium cell performed more than 40 cycles at 0.1 mA cm−2, at a fixed capacity of 0.5 mAh cm−2, retaining 100% coulombic efficiency, which is more than twice the lifespan of the bare lithium cell.

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Section: Lithium-oxygen Cells Performancesupporting

confidence: 59%