Solid polymer electrolyte membranes using the “polymer-in-ceramic” approach for all-solid-state supercapacitor applications

• Published in: Solid state ionics 2022-12, Vol.387, p.116063, Article 116063
• Main Authors: Sharma, Shrishti, Dalvi, Anshuman
• Format: Article
• Language: English
• Subjects: All-solid-state supercapacitors; Ceramic; Composite solid polymer electrolyte; Electric double layer capacitor; Polymer ceramic composite
• ISSN: 0167-2738; 1872-7689
• DOI: 10.1016/j.ssi.2022.116063

Interesting findings on the application of NASICON structured fast ionic Li 1.3Al0.3Ti 1.7(PO4)3 (LATP) to solid-state supercapacitors have been reported. The LATP added with various solid polymer electrolytes exhibits high ionic conductivity of ∼10−4 Ω−1 cm−1 at 40 °C. The supercapacitors fabricated using these electrolyte membranes display an optimized voltage window of 0–2 V at 1 mA (1.43 Ag−1). These show high specific capacitance ∼100 Fg−1 with specific energy ∼14 Whkg−1, specific power ∼ 682 Wkg−1, and coulombic efficiency ≥97% with excellent stability at least up to ∼2500 charge-discharge cycles. A good correlation is seen between the solid electrolyte membrane conductivity and supercapacitor performance. The performance parameters are in range with many of the gel/liquid-based electric double layer supercapacitors reported earlier. •LATP-polymer electrolyte composite exhibit high ionic conductivity of 10−4 Ω−1 cm−1 at 40 °C.•Solid-state supercapacitors have been fabricated using these membranes.•Supercapacitors exhibit predominantly non-faradic charge storage.•Membranes exhibit excellent stability as supercapacitor electrolytes.