Li alloy anodes for high-rate and high-areal-capacity solid-state batteries

Abstract

This work evaluates the dendrite suppression capability of common Li alloy anodes. Li-Al alloy outperforms other alloys in terms of dendrite suppression possibly due to its excellent mechanical properties.

Long‐Cycling All‐Solid‐State Batteries Achieved by 2D Interface between Prelithiated Aluminum Foil Anode and Sulfide Electrolyte

“…are expected to be potential anodes for high-energy-density ASSBs because of their much higher capacity than graphite anodes. [27][28][29][30][31][32] As the most abundant metal elements in the Earth's crust, Al anode has attracted great attention because of the advantages including high capacity (≈990 mAh g −1 , from Al to Li-Al), suitable operating potential (≈0.3 V vs Li + /Li), and low cost. [27,33] Until now, various Li-Al alloy anodes with different forms have been developed, including particles, nanowires, thin films, and composite structures for the liquid organic electrolyte-based cells.…”

Dual Protection of a Li–Ag Alloy Anode for All-Solid-State Lithium Metal Batteries with the Argyrodite Li6PS5Cl Solid Electrolyte

“…14−17 Therefore, lots of efforts have been endeavored to improve the stability of various sulfide SSEs and Li anodes, such as interface protection, 18−22 electrolyte optimization, 23−26 and Li-alloy anode implementation. 27−32 Among these proposed approaches, Li-alloy anodes, which exhibit high capacities and promote the even deposition of Li, 33,34 are promising solutions for the aforementioned problems in ASSLMBs.…”

“…Various inorganic SSEs have been developed so far, such as sulfides and oxides. − Among them, sulfide SSEs demonstrate a more promising application potential than their counterparts due to the advantages of high ionic conductivity (12 mS cm –1 of Li 10 GeP 2 S 12 (LGPS) and 1–6 mS cm –1 of Li 6 PS 5 Cl (LPSC) − ), simple preparation process, and abundant reserves of elements (P, S, and Cl). Nevertheless, most of the sulfide SSEs are unstable with Li metal, causing severe interface side reactions and uneven Li-deposit morphology, consequently accelerating Li dendrite growth and causing failure of the batteries. − Therefore, lots of efforts have been endeavored to improve the stability of various sulfide SSEs and Li anodes, such as interface protection, − electrolyte optimization, − and Li-alloy anode implementation. − Among these proposed approaches, Li-alloy anodes, which exhibit high capacities and promote the even deposition of Li, , are promising solutions for the aforementioned problems in ASSLMBs.…”

Sodium–gallium alloy layer for fast and reversible sodium deposition

“…As known, the Li-alloy layer on Li foil, such as Li-Zn, Li-As, Li-Sn, and Li-Bi alloys, can offer guidance for the behavior of Li + nucleation and growth during the plating process. 38 Usually, the alloy layer helps promote fast charge transport and interfacial dynamics. And the higher inertness of alloy layer compared with the pure metals alone favors reducing the parasitic reactions with organic electrolytes.…”

“…As known, the Li‐alloy layer on Li foil, such as Li–Zn, Li–As, Li–Sn, and Li–Bi alloys, can offer guidance for the behavior of Li + nucleation and growth during the plating process 38 . Usually, the alloy layer helps promote fast charge transport and interfacial dynamics.…”