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 -