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Swift combustion synthesis of PbLi 2 Ti 6 O 14 anode for lithium-Ion batteries: Diffusional and electrochemical investigation

Chaupatnaik, A and Barpanda, P (2019) Swift combustion synthesis of PbLi 2 Ti 6 O 14 anode for lithium-Ion batteries: Diffusional and electrochemical investigation. In: Journal of the Electrochemical Society, 166 (3). A5122-A5130.

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Official URL: https://doi.org/10.1149/2.0191903jes

Abstract

Lead lithium titanate (PbLi 2 Ti 6 O 14 ) was synthesized by combustion route restricting the annealing at 900°C to just 1 minute. Rietveld analysis confirmed orthorhombic (Cmca) product phase with an average particle size �200 nm and surface area of 2 m 2 /g forming secondary porous particles. From bond valence site energy (BVSE) calculations, 1 D ionic conduction was found along c axis with low activation energy (0.23 eV). AC conductivity analysis revealed a bulk conductivity of 2 � 10 -7 S.cm -1 at room temperature and 1 � 10 -4 S.cm -1 at 200°C with a switch from extrinsic 1D to intrinsic 2D mechanism at 150°C. Li + diffusion coefficient was calculated to be in the order of 10 -12 cm 2 .s -1 . More than 4 lithium (per f.u.) could be reversibly (de)inserted delivering capacity over 160 mAh/g with good cycling retention over 1000 cycles. With a feasible rapid synthesis, good diffusional and electrochemical behavior especially high rate capability, PbLi 2 Ti 6 O 14 can act as a safe 1.35 V anode for rechargeable Li-ion batteries. © The Author(s) 2018. Published by ECS.

Item Type: Journal Article
Additional Information: Copyright for this article belongs to The Electrochemical Society.
Keywords: Activation energy; Anodes; Combustion synthesis; Lead compounds; Lithium compounds; Particle size; Particle size analysis; Porous materials; Rietveld analysis; Titanium compounds, Average particle size; Bulk conductivities; Cycling retention; Delivering capacity; Electrochemical behaviors; Electrochemical investigations; High rate capability; Low-activation energy, Lithium-ion batteries
Department/Centre: Division of Chemical Sciences > Materials Research Centre
Depositing User: Id for Latest eprints
Date Deposited: 09 Apr 2019 06:29
Last Modified: 09 Apr 2019 06:29
URI: http://eprints.iisc.ac.in/id/eprint/62169

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