Intermetallic insertion anodes for lithium batteries.

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Intermetallic alloys have been investigated for many years as anode materials for lithium batteries and, more recently, as alternative electrodes to carbon, because of several intrinsic advantages including high capacity and safety. Some of the most studied alloys utilize tin as the active component because of its high theoretical capacity (996 mAh/g) and its slightly higher operating voltage (<400 mV) compared to metallic lithium. To date, the use of binary lithium alloys as anodes has been limited to the select number of main group elements (e.g. Sn) that can be lithiated at an appropriate voltage with acceptable kinetics. A major ... continued below

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4 p.

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Johnson, C. S.; Kahaian, A. J.; Kepler, K. D.; Scott, M.; Thackerary, M. M. & Vaughey, J. July 19, 1999.

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Description

Intermetallic alloys have been investigated for many years as anode materials for lithium batteries and, more recently, as alternative electrodes to carbon, because of several intrinsic advantages including high capacity and safety. Some of the most studied alloys utilize tin as the active component because of its high theoretical capacity (996 mAh/g) and its slightly higher operating voltage (<400 mV) compared to metallic lithium. To date, the use of binary lithium alloys as anodes has been limited to the select number of main group elements (e.g. Sn) that can be lithiated at an appropriate voltage with acceptable kinetics. A major disadvantage of binary Li{sub x}M alloy systems is that major phase changes occur during the electrochemical cycling of lithium. Severe volume expansion and contraction of the metal matrix, which limit the cycle life of the lithium cell, normally accompany these phase changes. The. most successful approach to overcoming this limitation has been the use of intermetallic alloys MM{prime} consisting of two (or more) metals, at least one of which is an ''active'' alloying element (M) and the other an ''inactive'' (M{prime}) element. During the reaction with lithium, such a system breaks up into regions of Li{sub x}M and inactive M{prime}. In our work, we have extended the concept of intermetallic electrodes to include topotactic reactions in which the intermetallic compound provides a host structure for lithium.

Physical Description

4 p.

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OSTI as DE00011900

Medium: P; Size: 4 pages

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  • 196th Meeting of the Electrochemical Society, Honolulu, HI (US), 10/17/1999--10/22/1999

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  • Report No.: ANL/CMT/CP-99599
  • Grant Number: W-31109-ENG-38
  • Office of Scientific & Technical Information Report Number: 11900
  • Archival Resource Key: ark:/67531/metadc618530

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  • July 19, 1999

Added to The UNT Digital Library

  • June 16, 2015, 7:43 a.m.

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  • April 10, 2017, 8:11 p.m.

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Johnson, C. S.; Kahaian, A. J.; Kepler, K. D.; Scott, M.; Thackerary, M. M. & Vaughey, J. Intermetallic insertion anodes for lithium batteries., article, July 19, 1999; Illinois. (digital.library.unt.edu/ark:/67531/metadc618530/: accessed November 12, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.