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Ratcheting of silicon island electrodes on substrate due to cyclic intercalation
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10.1063/1.3696298
/content/aip/journal/apl/100/12/10.1063/1.3696298
http://aip.metastore.ingenta.com/content/aip/journal/apl/100/12/10.1063/1.3696298
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Figures

Image of FIG. 1.
FIG. 1.

Schematic of a Si island on substrate under cyclic lithiation and delithiation. (a) Geometry of the entire system and (b) the free-body diagram of half of the island. Free-body diagrams at the end of (c) intercalation half-cycles and (d) deintercalation half-cycles.

Image of FIG. 2.
FIG. 2.

The rigid-perfectly plastic cohesive law used for modeling the interfacial sliding with differential sliding resistance during lithiation and delithiation half cycles. Here, denotes the interfacial sliding strength during the lithiation half-cycle and denotes the sliding strength during the delithiation half-cycle.

Image of FIG. 3.
FIG. 3.

Finite element simulations of deformation in a periodic array of islands. Ratcheting of the islands after (a) 1 cycle and (b) 10 cycles with differential sliding resistance and . Ratcheting of the islands after (c) 1 and (d) 10 cycles with differential yield stress for Si and . Elasticreversible response of an array of islands with after (e) 1 cycleand (f) 10 cycles. The thickness direction has been magnified by a factor of 4.

Image of FIG. 4.
FIG. 4.

Plan view of a 250 nm thick Si continuous film cycled at C/2.5 rate. (a) Film has fractured after 1 cycle. (b) The gap between the islands has substantially widened after 30 cycles. The matching edges and roughened surface of the islands suggest that the lateral dimensions of the islands have shrunk. The scale bars correspond to 2 μm of the actual dimensions (reprinted with permission from J. P. Maranchi et al., J. Electrochem. Soc., 153, A1246, 2006. Copyright 2006, The Electrochemical Society).

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/content/aip/journal/apl/100/12/10.1063/1.3696298
2012-03-22
2014-04-17
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Ratcheting of silicon island electrodes on substrate due to cyclic intercalation
http://aip.metastore.ingenta.com/content/aip/journal/apl/100/12/10.1063/1.3696298
10.1063/1.3696298
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