A dendrite-suppressed and utilization-improved metallic Li anode enabled by lithiophilic nano-Pb decoration on carbon cloth

Abstract

The commercialization of Li metal anode has been long hindered by uncontrolled dendrite growth, infinite volume expansion and poor Li metal utilization. Herein, we achieve a uniform nano-Pb decoration on...

Negating Na‖Na3Zr2Si2PO12 interfacial resistance for dendrite-free and “Na-less” solid-state batteries

“…2d ), the ultrafast charge transfer kinetics at the interface can also be ascribed to the easier Na diffusion in the Na 15 Pb 4 alloy than in metallic Na, a phenomenon widely confirmed in Li ( e.g. , Li–Pb 34 ) and Na ( e.g. , Na–Sn 38 ) alloy anodes.…”

“…S2, † clearly disclosing the phase transformation of LAT to PbO, and nally to Pb/C. [32][33][34] The existence of metallic Pb is conrmed using the XRD pattern acquired on the surface of a Pb/C@NZSP pellet (Fig. 1e).…”

“…It is hypothesized, based on the galvanostatic cycling, EIS and SEM analysis, that 3.5 mg is too less to achieve full Na penetration into the Pb/C porous layer, resulting in the insufficient active area for charge-transfer reactions at the interface region. 34 The sluggish kinetics will induce increasingly inhomogeneous Na plating/stripping with cycling, especially at higher current rates (e.g., 0.5C), causing dendrite growth and even a "so" short circuit as implied by the up-and-down CEs and Na depletion at the far-end. 22,38,51 The idea of tuning Na loading was also extended to S cathodes of greater potential in high-energy-density SSSMBs (see the "Experimental" section and Fig.…”

Stabilizing Metallic Na Anodes via Sodiophilicity Regulation: A Review

“…As far as conventional SMBs are concerned, we have shown that a great deal of research was conducted to develop 3D sodiophilic hosts for Na metal anodes, with significant performance achieved. However, it should be noticed that the attention to cell-level energy density, i.e., concerning the host and wetting agent weights, utilization of infused Na, and N/P ratios for full-cell demonstration, is not enough [84,92]. We note that much of the literature does not report cell-level energy densities and cost analyses because the field is still in its infancy compared to Li-ion.…”

Spherical Lithium Deposition Enables High Li‐Utilization Rate, Low Negative/Positive Ratio, and High Energy Density in Lithium Metal Batteries

“…The loading of the LiFePO 4 cathode used here is two to three times higher than that of previously reported LiFePO 4 cathodes, whereas the N/P ratio is much lower. [55][56][57][58][59] Due to the improved electrochemical activity and suppressed side reactions of spherical Li, excellent Li-metal cell performance is achieved, resulting in a high-capacity retention of 94.8% after 110 cycles. This is better than the whisker Li|LFP full cell, which shows a sharp capacity degradation after 90 cycles (Figure 5d).…”