An efficient bi-functional permselective separator coated with cubic type-Li₇La₃Zr₂O₁₂and activated carbon for lithium–sulfur batteries

Abstract

Controlling the shuttling of lithium polysulphides (LiPS) to enhance the utilization of elemental sulfur has been considered as an important issue to improve the energy density and coulombic efficiency of lithium–sulfur batteries.

Dual-role magnesium aluminate ceramic film as an advanced separator and polysulfide trapper in a Li–S battery: experimental and DFT investigations

“…2f). A similar observation was made by Natarajan et al, 55 and they reported that the R i value changed from 100 to 350 O in ten days.…”

“…In contrast, the R i value for the MAO/MWCNT separator remained around 90 O even after 9 days, indicating that MAO/ MWCNT acts as a scavenger to adsorb its traces solvents or impurities present in the electrolyte, thereby preventing their undesirable reactions with the Li metal anode. 55 Another possibility could be homogeneous electrolyte retention by the MAO/MWCNT matrix over Celgard s , thereby maintaining a constant R i , which is in line with the absorption property exhibited by MAO/MWCNT in the contact angle measurement. Thus, the fabricated freestanding MAO separator is observed to be highly stable with a Li metal interface.…”

“…reported a zeta potential value of À11.8 mV and À58.6 mV for the Li 7 La 3 Zr 2 O 12 ceramic separator and activated carbon, respectively. 55 To understand the interfacial stability of MAO/MWCNT and Celgard s , a symmetric cell of Li|Celgard s |Li and Li|MAO/ MWCNT|Li type was constructed. The impedance spectra were recorded at various storage durations at 30 1C (Fig.…”

“…Hence, the capacity fade associated with the in-house separators are low. 55,72 3.5. Self-discharge study…”

The Synergy of La2O3 Nanoparticles and Graphene for Advanced Li‐S Batteries

“…[33,34] For the S 2p peak (Figure 5g), the peak at 161.6, 163.0, 166.3, 168.4 and 169.5 eV are ascribed to the terminal sulfur atoms (S À 1 ), bridging sulfur atoms (S 0 ), SO 3 À , SO 4 À and SO x À 1 during the discharge mechanism, which could alleviate the sever shuttle problem. [35,36,37] Besides this, a new overlapped peak emerged at 163.5 eV, referring to the SÀ La chemical interactions. [38] Li 1s spectra for the cycled sample (Figure 5h) contained a broad signal that can be deconvoluted into two peaks at 55.4 eV and 56.3 eV.…”