Element doping strategies: Paving the way for next-generation Li-argyrodite solid electrolytes

TY - JOUR

T1 - Element doping strategies

T2 - Paving the way for next-generation Li-argyrodite solid electrolytes

AU - Kang, Kaidi

AU - Li, Songjie

AU - Guo, Ruiqi

AU - Wang, Xinran

AU - Bai, Ying

AU - Wu, Chuan

N1 - Publisher Copyright: © 2026 Elsevier Ltd. All rights are reserved, including those for text and data mining, AI training, and similar technologies.

PY - 2026/4/20

Y1 - 2026/4/20

N2 - All-solid-state lithium metal batteries (ASSLMBs) have shown great potentials in promoting the energy density and safety concerns in lithium-ion batteries (LIBs) due to their high thermal stability, utilization of lithium metal as anode and good dendrite inhibition capability. As the key component of ASSLMBs, the properties of solid electrolytes (SEs) play an essential role. Among all SEs, sulfide SEs, especially Li-argyrodites exhibit ideal ionic conductivity, good thermal stability and low cost, which makes them the promising candidates for the next generation of energy storage devices. However, there are still some difficulties needed to be overcome to realize the commercialization of Li-argyrodite SEs, including insufficient ionic conductivity, poor air stability and time-consuming synthesis processes. This review first introduces the crystal structure and Li-ion conduction mechanism of Li-argyrodite SEs. The traditional and advanced synthesis routes for Li-argyrodite SEs in recent years are presented. Moreover, the application of doping strategy in improving the ionic conductivity and (electro)chemical stability of Li-argyrodite SEs is systematically summarized. Finally, the perspective research directions of doping Li-argyrodite SEs are proposed to achieve high-performance ASSLMBs.

AB - All-solid-state lithium metal batteries (ASSLMBs) have shown great potentials in promoting the energy density and safety concerns in lithium-ion batteries (LIBs) due to their high thermal stability, utilization of lithium metal as anode and good dendrite inhibition capability. As the key component of ASSLMBs, the properties of solid electrolytes (SEs) play an essential role. Among all SEs, sulfide SEs, especially Li-argyrodites exhibit ideal ionic conductivity, good thermal stability and low cost, which makes them the promising candidates for the next generation of energy storage devices. However, there are still some difficulties needed to be overcome to realize the commercialization of Li-argyrodite SEs, including insufficient ionic conductivity, poor air stability and time-consuming synthesis processes. This review first introduces the crystal structure and Li-ion conduction mechanism of Li-argyrodite SEs. The traditional and advanced synthesis routes for Li-argyrodite SEs in recent years are presented. Moreover, the application of doping strategy in improving the ionic conductivity and (electro)chemical stability of Li-argyrodite SEs is systematically summarized. Finally, the perspective research directions of doping Li-argyrodite SEs are proposed to achieve high-performance ASSLMBs.

KW - Air stability

KW - All-solid-state lithium metal batteries

KW - Doping strategy

KW - Ionic conductivity

KW - Li-argyrodite electrolytes

UR - https://www.scopus.com/pages/publications/105035631505

U2 - 10.1016/j.est.2026.121433

DO - 10.1016/j.est.2026.121433

M3 - Review article

AN - SCOPUS:105035631505

SN - 2352-152X

VL - 155

JO - Journal of Energy Storage

JF - Journal of Energy Storage

M1 - 121433

ER -