Integrated manufacturing of REciclable multi-material COmposites for the TRANSport sector
Hopping?Phase Ion Bridge Enables Fast Li+ Transport in Functional Garnet?Type Solid?State Battery at Room Temperature
Hopping phase ion bridge (HPIB) is introduced into the interface between polyvinylidene fluoride and functionalized Li6.4La3Zr1.4Ta0.6O12; high?throughput ion transporter (HTIT?37) is constructed. The self?adsorption of HPIB at the electrode–electrolyte interface effectively enhances the interfacial Li+ transport kinetics and suppresses the formation of lithium dendrites. It provides a more valuable option for the next generation of high energy density solid?state batteries.Composite polymer electrolytes (CPEs) containing Li6.4La3Zr1.4Ta0.6O12 (LLZTO) is widely regarded as leading candidate for high energy density solid?state lithium?metal batteries due to its exceptional ionic conductivity and environmental stability. However, Li2CO3 and LiOH layers at LLZTO surface greatly hinder Li+ transport between LLZTO?polymer and the electrode–electrolyte interface. Herein, the surface of LLZTO is boronized to obtain functionalized LLZTO, and its conversion mechanism is clarified. By dissolving the crystal structure of cellulose to obtain hopping?phase ion bridge (HPIB), which release the Li+ transport activity of its oxygen?containing polar functional group (?OH, ?O?). Therefore, a high?throughput ion transporter (HTIT?37) with high ion transfer number (0.86) is prepared by introducing the HPIB into functionalized LLZTO and polyvinylidene fluoride interface by intermolecular hydrogen bond interaction, and it is demonstrated that the HPIB acts as a “highway” for the Li+ across this heterogeneous interface. Moreover, the HPIB is found to self?adsorb on the SEI surface, leading to fast Li+ transport kinetics at anode–CPE interface. Thus, the lifespan of Li|HTIT?37|Li is over 8000 h, and the critical current density exceeds 2.3 mA cm?2. The LiNi0.5Co0.2Mn0.3O2|Li and Li1.2Ni0.13Co0.13Mn0.54O2|Li battery remains stable with the HPIB?enhanced electrode process, proving the application potential of LLZTO?based CPE in high energy density SSLMB.
» Publication Date: 05/02/2025
This project has received funding from the European Union's Horizon 2020 research and innovation programme under grant agreement Nº 768737
