Increasing reversible capacity of soft carbon anode by phosphoric acid treatment

Soft carbon with a high reversible capacity has been proposed as an anode material for high-power lithium ion batteries. In this work, we investigate the effect of phosphoric acid (H sub(3)PO sub(4)) addition during preparation on the microstructure and electrochemical performance of soft carbon. H...

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Published inElectrochimica acta Vol. 146; pp. 630 - 637
Main Authors Jo, Yong-Nam, Park, Min-Sik, Lee, Eun-Young, Kim, Jae-Geun, Hong, Ki-Joo, Lee, Sang-Ick, Jeong, Hu Young, Ryu, Gyeong Hee, Lee, Zonghoon, Kim, Young-Jun
Format Journal Article
LanguageEnglish
Published 10.11.2014
Subjects
Anodes
Bonding
Carbon
Carbon-carbon composites
Lithium batteries
Phosphoric acid
Porosity
Stopping
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Summary:Soft carbon with a high reversible capacity has been proposed as an anode material for high-power lithium ion batteries. In this work, we investigate the effect of phosphoric acid (H sub(3)PO sub(4)) addition during preparation on the microstructure and electrochemical performance of soft carbon. H sub(3)PO sub(4) facilitates the formation of nanopores by terminating C-C bonding and forming C-O sub(x)-P (0<x less than or equal to 4) chemical bonds. The newly integrated nanopores are mainly responsible for increasing the reversible capacity of soft carbon and maintaining excellent cycle performance and rate capability. In addition, the proposed synthetic route is simple and cost-effective, which will be helpful for successfully employing soft carbon on a commercial scale.
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ISSN:0013-4686
DOI:10.1016/j.electacta.2014.09.088