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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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Elimination of extraneous irreversible capacity in mesoporous tin phosphate anode by amorphous carbon coating

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Title
Elimination of extraneous irreversible capacity in mesoporous tin phosphate anode by amorphous carbon coating
Author
Kim, EunjinKim, YoojinKim, Min GyuCho, Jaephil
Keywords
Carbon coating; Lithium phosphate; Mesoporous tin phosphate; Sodium-dodecyl-sulfate surfactant
Issue Date
2006
Publisher
ELECTROCHEMICAL SOC INC
Citation
ELECTROCHEMICAL AND SOLID STATE LETTERS, v.9, no.3, pp.A156 - A159
Abstract
Mesoporous tin phosphate with a ∼10 nm pore size was synthesized using a sodium-dodecyl-sulfate surfactant as a new anode for a Li-ion cell. The tin phosphate with body centered cubic (bcc) mesostructure exhibited a initial charge capacity of 540 mAhg, and showed good capacity retention ratio, corresponding to 87% after 20 cycles. Relatively large irreversible capacity (571 mAhg) ratio of 51%, which impedes the practical application in Li-ion cell, is reduced by the amorphous carbon coating. The coating leads not only to reduced extraneous irreversible capacity ratio of 26% but also improved capacity retention by 11% without changing the first charge cpacity, compared with the uncoated sample. However, intrinsic irreversible capacity loss from the decomposition reaction to tin metal and lithium phosphate phase is unavoidable.
URI
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DOI
http://dx.doi.org/10.1149/1.2164587
ISSN
1099-0062
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ECHE_Journal Papers

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