Observation of reversible pore change in mesoporous tin phosphate anode material during Li alloying/dealloying

Hansu Kim, Gyeong Su Park, Eunjin Kim, Jinyoung Kim, Seok Gwang Doo, Jaephil Cho

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

We observed the pore expansion and contraction of mesoporous tin phosphate during Li alloying/dealloying using small-angle X-ray scattering and transmission electron microscopy. As-prepared mesoporous tin phosphate showed pore and porewall sizes of 3 and 2 nm, respectively. During lithium alloying (discharging), pore size was slightly contracted, but porewall size was slightly expanded within the range of 1 nm. However, during lithium dealloying (charging), pore and porewall sizes recovered to their original sizes before cycling. The charged sample had a nanoscale pore (∼3 nm) array with a more or less uniformly sized open-porewall structure of amorphous lithium phosphates with metallic α-Sn face-centered-cubic nanocrystals ∼2 nm in diameter.

Original languageEnglish
JournalJournal of the Electrochemical Society
Volume153
Issue number9
DOIs
StatePublished - 2006 Jan 1

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Tin
Lithium
Alloying
alloying
tin
phosphates
Anodes
Phosphates
anodes
porosity
lithium
X ray scattering
Nanocrystals
Pore size
Transmission electron microscopy
contraction
charging
nanocrystals
transmission electron microscopy
cycles

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Kim, Hansu ; Park, Gyeong Su ; Kim, Eunjin ; Kim, Jinyoung ; Doo, Seok Gwang ; Cho, Jaephil. / Observation of reversible pore change in mesoporous tin phosphate anode material during Li alloying/dealloying. In: Journal of the Electrochemical Society. 2006 ; Vol. 153, No. 9.
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Observation of reversible pore change in mesoporous tin phosphate anode material during Li alloying/dealloying. / Kim, Hansu; Park, Gyeong Su; Kim, Eunjin; Kim, Jinyoung; Doo, Seok Gwang; Cho, Jaephil.

In: Journal of the Electrochemical Society, Vol. 153, No. 9, 01.01.2006.

Research output: Contribution to journalArticle

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