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Author

Cho, Jaephil
Nano Energy Storage Materials Lab (NESM)
Research Interests
  • Li-ion battery, metal-air battery, redox-flow battery, flexible battery .

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Effect of anisotropic volume change in tin phosphate nanoparticle anode material with mesocellular foam structure on capacity retention

Cited 7 times inthomson ciCited 8 times inthomson ci
Title
Effect of anisotropic volume change in tin phosphate nanoparticle anode material with mesocellular foam structure on capacity retention
Author
Kim, EunjinKim, Min GyuCho, Jaephil
Keywords
Annealed sample; Microcellular foams; Pore wall structure
Issue Date
200606
Publisher
ELECTROCHEMICAL SOC INC
Citation
ELECTROCHEMICAL AND SOLID STATE LETTERS, v.9, no.6, pp.A311 - A314
Abstract
Tin phosphate nanoparticles within microcellular foams were prepared using a nonionic triblock copolymer surfactant P123. The annealed sample at 500°C showed the particle size of 50-200 nm, and the size of the mesocelluar foam was ranged from 4 to 20 nm. Due to the irregular porewall thickness and pore size of the annealed sample, the pore wall structure had completely collapsed after first cycle. As the number of cycles increased, metallic tin clusters grew in the lithium phosphate matrix, and uniformly dispersed tetragonal tin nanoparticles with a particle size of 3 nm were observed after 100 cycles. This indicated that tin clusters decomposed from tin phosphate expanded and contracted reversibly in the matrix without particle aggregation. This was well supported by the electrochemical data, and the capacity increased to from 285 to 520 mAhg with no capacity fading.
URI
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DOI
http://dx.doi.org/10.1149/1.2193082
ISSN
1099-0062
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ECHE_Journal Papers

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