Hydrogen-Bonded Organic Frameworks-based Electrolytes with Controllable Hydrogen Bonding Networks for Solid-State...

Area of Science:

• Materials Science
• Electrochemistry
• Energy Storage

Background:

• Solid-state lithium batteries face challenges with stable solid-state electrolytes (SSEs) and electrode/electrolyte interfaces.
• Achieving high ionic conductivity and rational interface design are critical for practical applications.

Purpose of the Study:

• To develop a high-performance solid-state lithium-oxygen (Li-O2) battery using a novel electrolyte.
• To investigate the properties and performance of a Li-ion-conducted hydrogen-bonded organic framework (LHOF) electrolyte.

Main Methods:

• Fabrication of a solid-state Li-O2 battery utilizing LHOF-DAT SSEs and a HOF-DAT@CNT composite cathode.
• Characterization of ionic conductivity, transference number, electrochemical window, and cycling stability of the LHOF-DAT SSEs.
• Evaluation of battery performance, including specific capacity, cycling life, and rate capability.

Main Results:

• LHOF-DAT SSEs exhibit fast Li+ ion transport (2.2×10-4 S cm-1), high transference number (0.88), and a wide electrochemical window (5.05 V).
• Symmetric batteries demonstrated stable cycling over 1400 hours, attributed to uniform Li+ flux and structural stability.
• Li-O2 batteries achieved a high specific capacity (10335 mAh g-1) and 150 cycles; solid-state lithium metal batteries showed good rate capability and 210 cycles.

Conclusions:

• The developed LHOF-DAT SSEs provide a promising platform for high-performance solid-state lithium batteries.
• The dynamic hydrogen bonding network is key to achieving fast ion transport and structural integrity.
• This work opens new avenues for designing advanced solid-state electrolytes for next-generation energy storage.