Enabling a compatible Li/garnet interface via a multifunctional additive of sulfur

Abstract

Ceramics-based solid-state batteries with lithium metal anode show great potential to realize a battery revolution because of their features of nonflammability and higher energy density. Among the inorganic electrolytes, garnet-type...

Constructing electron-blocking grain boundaries in garnet to suppress lithium dendrite growth

“…In comparison, in this work, the Li/1LiF-LLZTO/LFP full cell exhibits an extended lifespan and higher capacity retention at a high current density than other reported full cells utilizing LLZO electrolyte, lithium metal anode, and LFP cathode (Fig. 10(f)) [17,20,[42][43][44][45][46][52][53][54][55][56][57][58][59][60][61]. Additionally, the charge/discharge profiles for the 1st, 100th, 200th, 300th, 400th, and 500th cycles are shown in Fig.…”

Construction of an intimately riveted Li/garnet interface with ultra-low interfacial resistance for solid-state batteries

“…4c), which indicates the dendrite-suppressing ability of the LSi15 electrode and superior interface stability during Li cycling. In comparison, the control cell with the pristine Li electrode, reported in our previous work, 41 shows a noisy potential with large voltage polarization and serious voltage fluctuations upon cycling. The cell fails to cycle in a few hours owing to the lithium dendrite-induced short-circuit, as confirmed by the post-morphological observation on the cross section of the LLZTO pellet (Fig.…”

“…As shown in Fig. 4a, the symmetric cell with pure Li electrodes shows a much higher area specific resistance (ASR) of 273.1 Ω cm 2 (referring to the one-sided electrode–electrolyte interface), 41 while a considerable impedance decrease is observed for the Li–Li 4.4 Si|LLZTO|Li–Li 4.4 Si symmetric cells, which is mainly attributed to the better interface connection between the Li–Li 4.4 Si composites and the LLZTO pellet. Specifically, as the mass ratio of Si addition increases, the arc impedance displays an initially decreasing and then increasing trend.…”

“…). 18,35–41 Among the strategies mentioned above, tuning the wettability of molten Li by constructing an alloy anode shows great promise because of its easy operability and manufacturing scalability. Benefitting from the improved wettability of molten Li with LLZO, an intimate interface contact and thus a much reduced interfacial resistance is achieved.…”

“…), [24][25][26][27][28][29][30][31] adding a so polymer/gel buffer layer, [32][33][34] or compositing the Li anode with a lithiophilic phase to adjust surface energy of molten Li (Li@graphite, Li@Na, Li@Si 3 N 4 , Li@g-C 3 N 4 , Li@Mg 3 N 2 , Li@Zn, Li@Sn, Li@S, etc.). 18,[35][36][37][38][39][40][41] Among the strategies mentioned above, tuning the wettability of molten Li by constructing an alloy anode shows great promise because of its easy operability and manufacturing scalability. Benetting from the improved wettability of molten Li with LLZO, an intimate interface contact and thus a much reduced interfacial resistance is achieved.…”