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|Title:||Paper like free-standing hybrid single-walled carbon nanotubes air electrodes for zinc–air batteries||Authors:||Gupta, Nutan
Fatt, Mak Wai
Mhaisalkar, Subodh Gautam
|Keywords:||DRNTU::Engineering::Materials::Energy materials||Issue Date:||2011||Source:||Gupta, N., Toh, T., Fatt, M. W., Mhaisalkar, S., & Srinivasan, M. (2011). Paper like free-standing hybrid single-walled carbon nanotubes air electrodes for zinc–air batteries. Journal of solid state electrochemistry, 16(4), 1585-1593.||Series/Report no.:||Journal of solid state electrochemistry||Abstract:||Flexible electrode architectures based on non-functionalized (P2) and functionalized (P3) single-walled carbon nanotubes (SWNTs) were fabricated via a simple vacuum filtration process. A hybrid layer of various compositions of P2- and P3-SWNTs forms free-standing membranes (~80 μm in thickness), and their electrochemical performance was evaluated as an air electrode AEP2/P3 in zinc–air batteries. Such bifunctionalized air electrodes showed uniform surface morphology with interconnected micron-sized porous structure with high porosity (~70%). The N2 adsorption isotherms at 77 K are of type IV with BET-specific surface areas of AE(60/40) and AE(80/20) to be 130.54 and 158.76 m^(2) g^(−1), respectively, thus facilitates high active surface area for active oxygen reduction/evolution reactions. BJH pore size distribution of AE(60/40) and AE(80/20) shows maximum pores with diameter <15 nm. The zigzag interlaying of the SWNTs imparts mechanical stability and flexibility in zinc–air batteries. Zinc–air batteries with optimized compositions of P2- and P3-SWNTs in air electrode AE(60/40) had ionic conductivity ~1 × 10−2 S cm^(−1) and delivered higher discharge capacity ~300 mAh g^(−1) as compared to AE(80/20) composition. The unique properties of AE(P2/P3) studied in this work would enable flexible air electrode architectures in future metal–air batteries.||URI:||https://hdl.handle.net/10356/99373
|DOI:||10.1007/s10008-011-1559-5||Fulltext Permission:||none||Fulltext Availability:||No Fulltext|
|Appears in Collections:||MSE Journal Articles|
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