Unveiling Interfacial Li-Ion Dynamics in Li₇La₃Zr₂O₁₂/PEO(LiTFSI) Composite Polymer-Ceramic Solid Electrolytes for All-Solid-State Lithium Batteries

Abstract

Unlocking the full potential of solid-state electrolytes (SSEs) is key to enabling safer and more-energy dense technologies than today's Li-ion batteries. In particular, composite materials comprising a conductive, flexible polymer matrix embedding ceramic filler particles are emerging as a good strategy to provide the combination of conductivity, mechanical and chemical stability demanded from SSEs. Yet, the electrochemical

Bridging Li7La3Zr2O12 Nanofibers with Poly(ethylene oxide) by Coordination Bonds to Enhance the Cycling Stability of All-Solid-State Lithium Metal Batteries

“…The Li + migration number (t Li + ) has an important influence on the growth of lithium dendrites during the charge/discharge process. 33 Higher t Li + values indicate a lower Li + concentration gradient near the Li anode, which results in a weakening of the interfacial electric field, thereby reducing the growth of lithium dendrites. 34,35 Compared with the t Li + value of the PEO/LLZO NFs/LiTFSI electrolyte of 0.56 (Figure S3), the PEO/LLZO NFs−DI−Ca 2+ /LiTFSI electrolyte exhibits a high t Li + of 0.72, as shown in Figure 4b.…”

A high‐voltage solid‐state organic lithium battery based on 2,3,5,6‐tetrafluoro‐7,7,8,8‐tetracyanoquinodimethane cathode

“…The average potential of the batteries is about 3.0 V (vs Li + /Li), which is higher than the average redox potential (ARP) of most organic cathode materials. 14,15,19,20 ARP for F 4 TCNQ and other organic cathode materials in solid-state lithium batteries is listed in Table 1.…”

“…Taking into account the conductivity of the solid electrolyte itself and to reduce interfacial impedance, the most commonly used solution is mixing organic polymer electrolytes with oxide-based electrolytes to synthesize composite polymer electrolytes (CPE). 12,13 PEO with Ta-doped Li 7 La 3 Zr 2 O 12 (LLZO) (PEO-LLZTO) CPE is reported to have high ionic conductivity and stability, 14,15 which makes it a promising in solid-state lithium batteries (ASSLBs).…”

Li6.4La3Zr1.4Ta0.6O12/Star-Shaped Hybrid Polyhedral Oligomeric Cage Silsesquioxane Polymer Composite Electrolytes for All-Solid-State Lithium Metal Batteries

“…The solid electrolytes (SEs), like inorganic ceramic electrolytes (ICEs) and solid polymer electrolytes (SPEs), − can solve the potential safety problems since there is no flammable and volatile organic plasticizer in them. The ICEs-like garnet-type oxide electrolyte (LLZO) and ion-doped modifier have been extensively studied due to their high ionic conductivity, wide potential window, and good chemical stability. , Nevertheless, the weak electrode/electrolyte interface compatibility, high production cost, and brittleness limit their wide scale practical diffusion. , The SPEs based on poly­(ethylene oxide) (PEO) with high flexibility and soft can adapt to various shapes batteries and have better electrode compatibility, which have been investigated extensively. However, the linear polymers tend to crystallize due to their high degree of order at ambient temperature, resulting in low ionic conductivity.…”

“…The ICEslike garnet-type oxide electrolyte (LLZO) and ion-doped modifier have been extensively studied due to their high ionic conductivity, wide potential window, and good chemical stability. 9,10 Nevertheless, the weak electrode/electrolyte interface compatibility, high production cost, and brittleness limit their wide scale practical diffusion. 11,12 The SPEs based on poly(ethylene oxide) (PEO) with high flexibility and soft can adapt to various shapes batteries and have better electrode compatibility, which have been investigated extensively.…”