Lithium intercalation in porous carbon electrodes

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Carbons derived from the phase separation of polyacrylonitrile/solvent mixtures were investigated as lithium intercalation anodes for rechargeable lithium-ion batteries. The carbon electrodes have a bulk density of 0.35-0.5 g/cm{sup 3}, relatively low surface areas (< 10 m{sup 2}/g), and micron-size cells. Pyrolysis temperature influences the reversible lithium intercalation and the irreversible capacity (associated with the formation of the passivating layer). Carbon electrodes pyrolyzed at 600{degrees}C have first-cycle capacity as high as 550 mAh/g as well as large irreversible capacity, 440 mAh/g. Electrodes prepared at 1050{degrees}C have reversible capacities around 270 mAh/g with relatively lower capacity losses (120 mAh/g). Doping the ... continued below

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9 p.

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Tran, T.D.; Feikert, J. & Pekala, R.W. April 1, 1995.

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Carbons derived from the phase separation of polyacrylonitrile/solvent mixtures were investigated as lithium intercalation anodes for rechargeable lithium-ion batteries. The carbon electrodes have a bulk density of 0.35-0.5 g/cm{sup 3}, relatively low surface areas (< 10 m{sup 2}/g), and micron-size cells. Pyrolysis temperature influences the reversible lithium intercalation and the irreversible capacity (associated with the formation of the passivating layer). Carbon electrodes pyrolyzed at 600{degrees}C have first-cycle capacity as high as 550 mAh/g as well as large irreversible capacity, 440 mAh/g. Electrodes prepared at 1050{degrees}C have reversible capacities around 270 mAh/g with relatively lower capacity losses (120 mAh/g). Doping the organic precursors with phosphoric acid, prior to pyrolysis at 1050{degrees}C, leads to carbon electrodes with reversible capacities as high as 450 mAh/g. The capacity of doped carbon increased with increasing phosphorus concentration in the samples. The doped carbon anodes exhibited good cycleability and excellent coulombic efficiency. The electrochemical performance is related to morphology, chemical composition, and local structural order.

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9 p.

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OSTI as DE95017815

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  • Spring meeting of the Materials Research Society (MRS), San Francisco, CA (United States), 17-21 Apr 1995

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  • Other: DE95017815
  • Report No.: UCRL-JC--120314
  • Report No.: CONF-950412--53
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 105041
  • Archival Resource Key: ark:/67531/metadc619530

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  • April 1, 1995

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  • June 16, 2015, 7:43 a.m.

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  • Feb. 19, 2016, 11:05 a.m.

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Tran, T.D.; Feikert, J. & Pekala, R.W. Lithium intercalation in porous carbon electrodes, article, April 1, 1995; California. (digital.library.unt.edu/ark:/67531/metadc619530/: accessed June 22, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.