A broad pore size distribution mesoporous SnO2 as anode for lithium-ion batteries

Shiva, Konda and Kiran, MSRN and Ramamurty, U and Asokan, S and Bhattacharyya, Aninda J (2012) A broad pore size distribution mesoporous SnO2 as anode for lithium-ion batteries. In: JOURNAL OF SOLID STATE ELECTROCHEMISTRY, 16 (11, SI). pp. 3643-3649.

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Abstract

We demonstrate here that mesoporous tin dioxide (abbreviated M-SnO2) with a broad pore size distribution can be a prospective anode in lithium-ion batteries. M-SnO2 with pore size ranging between 2 and 7.5 nm was synthesized using a hydrothermal procedure involving two different surfactants of slightly different sizes, and characterized. The irreversible capacity loss that occurs during the first discharge and charge cycle is 890 mAh g(-1), which is smaller than the 1,010-mAh g(-1) loss recorded for mesoporous SnO2 (abbreviated S-SnO2) synthesized using a single surfactant. After 50 cycles, the discharge capacity of M-SnO2 (504 mAh g(-1)) is higher than that of S-SnO2 (401 mAh g(-1)) and solid nanoparticles of SnO2 (abbreviated nano-SnO2 < 4 mAh g(-1)) and nano-SnO2. Transmission electron microscopy revealed higher disorder in the pore arrangement in M-SnO2. This, in turn imparts lower stiffness to M-SnO2 (elastic modulus, E (R) a parts per thousand aEuro parts per thousand 14.5 GPa) vis-a-vis S-SnO2 (E (R) a parts per thousand aEuro parts per thousand 20.5 GPa), as obtained using the nanoindentation technique. Thus, the superior battery performance of M-SnO2 is attributed to its intrinsic material mechanical property. The fluidity of the internal microstructure of M-SnO2 resulted in a lower degree of aggregation of Sn particles compared to S-SnO2 and nano-SnO2 structural stabilization and long-term cyclability.

Item Type:	Journal Article
Publication:	JOURNAL OF SOLID STATE ELECTROCHEMISTRY
Publisher:	Springer
Additional Information:	Copyright for this article belongs to SPRINGER, NEW YORK,
Department/Centre:	Division of Chemical Sciences > Solid State & Structural Chemistry Unit Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy) Division of Physical & Mathematical Sciences > Instrumentation Appiled Physics
Date Deposited:	31 Dec 2012 06:02
Last Modified:	31 Dec 2012 06:02
URI:	http://eprints.iisc.ac.in/id/eprint/45481

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