Regulated lithium deposition behavior by chlorinated hybrid solid-electrolyte-interphase for stable lithium metal anode

Hexachloro-1,3-butadiene as a Functional Additive for Constructing an Efficient Solid Electrolyte Interface Layer for Long-Life Stable Li Anodes

“…These results may well prove the occurrence of reduction reactions shown in Figure b. Furthermore, this formed SEI layer with rich LiCl displaying a superior electron insulating property can hinder the electron flow tunneling from the Li metal to SEI, and then Li + ions will be reduced under the formed SEI layer instead of in the SEI layer to form zero-valent Li, inhibiting the growth of Li dendrites and the continuous consumption of active Li (Figure e,f) …”

“…33 Recently, LiCl possessing a high ionic conductivity (∼10 −3 to 10 −2 S cm −1 ) and electrochemical stability, low electronic conductivity, and a lower interfacial diffusion barrier (the migration energy barrier at the Li/LiCl interface is 0.085 eV) 34,35 is considered as an effective component of an ideal SEI layer to improve the Li-ion conductivity (the ionic conductivity of the routine SEI is 4.2 × 10 −8 S cm −136 ) and mechanical properties. For example, Jiang and his co-workers constructed a chlorinated hybrid SEI layer on the Li anode surface, and it is found that the electron-blocking ability of LiCl enriched on the surface of artificial SEI inhibits the tunneling of electron flow from Li metal to SEI, thus preventing the generation of Li 0 and making the Li metal anode with good cycling performance within 2000 h. 37 Zhao and co-workers reported a facile in situ synthesis that utilized accessible SiCl 4 cross-linking chemistry to create durable hybrid SEIs with rich LiCl on the Li anode, which can provide excellent morphological control of the Li metal anode at high current densities of 3−5 mA cm −2 . 38 Although LiCl-rich SEI layers show a positive and attractive effect on the deposition Li behavior during the cycling processes in LMBs, it is very difficult to homogeneously introduce it into the SEI films directly because it is almost insoluble in ether organic solvents.…”

Spatially Confined Li Growth on Honeycomb-like Lithiophilic Layered Double Hydroxide Nanosheet Arrays toward a Stable Li Metal Anode

“…The electrochemical impedance spectroscopy (EIS) of the symmetrical cells was conducted to understand the chemical stability of the three samples interfacial upon cycling. 64 The Nyquist plot and corresponding equivalent circuit models, as well as fitted value, are shown in Figure S20 and Table S2. The semicircles in the high-frequency region are associated with the charge-transfer resistance (R ct ) between the electrolyte/electrode.…”

“…As exhibited in Figure S19c–f, plenty of “dead Li” and Li protrusions appear on the surface of the CC and Cu foil, whereas the surface of NiMn-LDHs NAs@CC is smooth without any dendritic Li, and the well-arranged honeycomb-like NiMn-LDHs are reappearance (Figure S19a, b), strongly certifying that the sustainable Li utilization with high CE originates from the NiMn-LDHs NAs@CC suppresses the formation of Li dendrites and “dead Li”. The electrochemical impedance spectroscopy (EIS) of the symmetrical cells was conducted to understand the chemical stability of the three samples interfacial upon cycling . The Nyquist plot and corresponding equivalent circuit models, as well as fitted value, are shown in Figure S20 and Table S2.…”

A paradigm for systematic screening and evaluation of artificial solid-electrolyte interfaces for lithium metal anodes: a computational study of binary selenides

“…10,12 The desirable attributes of the artificial SEIs, including high chemical stability, high Li-ion conductivity, good electronic insulation, and high mechanical strength, are imperative for the inhibition of the parasitic reactions and dendrite growth on the anode surface. 6,12,13 The broadly studied coating materials for LMAs include alloys, 14 two-dimensional (2D) materials, 15 polymers, 16,17 carbon-based materials, 4,18 and inorganic lithium species. 19,20 However, the SEI materials available for lithium anode protection are still very limited, and the development of new lithium-stable protection materials is the key for the successful commercialization of LMAs.…”