Unshackling the reversible capacity of SiOx/graphite-based full cells via selective LiF-induced lithiation

Constructing Sub 10 nm Scale Interfused TiO2/SiOx Bicontinuous Hybrid with Mutual-Stabilizing Effect for Lithium Storage

“…The first discharge and charge capacities are 709.8 and 470.6 mAh g –1 , leading to an initial Coulombic efficiency (ICE) of 66.3%. The initial capacity loss might be from the formation of an SEI as well as irreversible products (Li 2 O and lithium silicate) from the conversion reaction of SiO x , which could be tackled with prelithiation strategies. − To understand the electrochemical activation process, in situ electrochemical impedance spectra (EIS; Figure S6) are collected at 0.1 A g –1 for the cell before cycling and after 1, 5, 10, 25, and 50 cycles. The charge transfer resistance reflected from the semicircle shows a rapid decrease from 173 to 55 Ω at the discharge state after 1 cycle and remains almost stable in the following cycles.…”

Coordinating ionic and electronic conductivity on 3D porous host enabling deep dense lithium deposition toward high-capacity lithium metal anodes

“…As one of the main components of the SEI in ether electrolytes, LiF has a positive impact on Li ion conduction and transport. [41][42][43][44][45][46] Meanwhile, the electrical insulation of LiF would also change the electronic conductivity of the 3D current collector, thus affecting the electroactive sites. Therefore, the placement orientations of the LiF-enriched surface in cells would cause different Li deposition effects on the 3D host.…”

Insights into the multi-functional lithium difluoro(oxalate)borate additive in boosting the Li-ion reaction kinetics for Li3VO4 anodes

“…8,9 The construction of stable, flexible SEI films determines the Li-ion insertion/extraction chemistries and is favorable to the enhancement of the cycling performance and rate capabilities for LIB anodes. [10][11][12] The rational design of desirable SEI films can be realized by tailoring the components of the electrolytes, including Li salts, solvents and additives. 13 Even the commonly used LiPF 6 electrolyte has the disadvantages of low thermal and chemical stability, which endows the constructed SEI with a high ionic conductivity and wide operating voltage.…”