Enhancement of capacity and cycle-life of Sn4+delta P3 (0 <=delta <= 1) anode for lithium secondary batteries
- Authors
- Kim, YU; Lee, SI; Lee, CK; Sohn, HJ
- Issue Date
- 16-Feb-2005
- Publisher
- ELSEVIER SCIENCE BV
- Keywords
- tin phosphide; anode; capacity; solid solution; cycle performance; lithium battery
- Citation
- JOURNAL OF POWER SOURCES, v.141, no.1, pp 163 - 166
- Pages
- 4
- Journal Title
- JOURNAL OF POWER SOURCES
- Volume
- 141
- Number
- 1
- Start Page
- 163
- End Page
- 166
- URI
- https://scholarworks.bwise.kr/kumoh/handle/2020.sw.kumoh/22577
- DOI
- 10.1016/j.jpowsour.2004.09.007
- ISSN
- 0378-7753
1873-2755
- Abstract
- Various compositions of tin-rich, non-stoichiometric, solid solutions of Sn4+deltaP3 are synthesized by a mechanochernical method. The materials are tested as anodes for lithium secondary batteries to enhance reversible capacity and cycleability. Investigative analyses show that the region for the solid-solution formation of Sn4+deltaP3 is 0 less than or equal to delta less than or equal to 1. The reaction mechanism of the tin-rich solid solutions is similar to that of stoichiometric Sn4P3, except for the absence of a topotactic lithium insertion reaction during the first cycle. As the tin content is increased, tin-rich phosphide exhibits better cycleability and retains a higher reversible capacity, namely, about 20% more than that of stoichiometric Sn4P3 (C) 2004 Published by Elsevier B.V.
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