Lithium intercalation carbon and method for producing same
Abstract
Disordered carbons were synthesized at 700.degree. C. from methacrylonitrile-divinylbenzene precursors. The disorder, even at the free surface, was confirmed with TEM. These powdered carbons were subjected to rapid surface heating by a pulsed infrared laser (59 MW pulses). While the bulk structure remained essentially unchanged, there was substantial "surface reconstruction" to a depth of 0.25 .mu.m presumably due to ablation, re-deposition, and "recrystallization" of the surface carbon after heating by the laser. The surface ordering appears similar to the bulk microstructure of carbons isothermally annealed at 2,200.degree. C. (i.e., turbostatic). Improvements were observed in first cycle irreversible loss, rate capability, and coulombic efficiencies of the "reconstructed" carbons, relative to the untreated carbon.
- Inventors:
-
- (4254 Drake Way, Livermore, CA 94550)
- 3019 Florida St. NE., Albuquerque, NM 87110
- Issue Date:
- Research Org.:
- Sandia National Laboratories (SNL), Albuquerque, NM, and Livermore, CA (United States)
- OSTI Identifier:
- 873625
- Patent Number(s):
- 6207124
- Assignee:
- Even, Jr., William R. (4254 Drake Way, Livermore, CA 94550);Guidotti, Ronald A. (3019 Florida St. NE., Albuquerque, NM 87110)
- Patent Classifications (CPCs):
-
C - CHEMISTRY C01 - INORGANIC CHEMISTRY C01B - NON-METALLIC ELEMENTS
H - ELECTRICITY H01 - BASIC ELECTRIC ELEMENTS H01M - PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- DOE Contract Number:
- AC04-94AL85000
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
- Subject:
- lithium; intercalation; carbon; method; producing; disordered; carbons; synthesized; 700; degree; methacrylonitrile-divinylbenzene; precursors; disorder; free; surface; confirmed; powdered; subjected; rapid; heating; pulsed; infrared; laser; 59; mw; pulses; bulk; structure; remained; essentially; unchanged; substantial; reconstruction; depth; 25; presumably; due; ablation; re-deposition; recrystallization; appears; similar; microstructure; isothermally; annealed; 200; turbostatic; improvements; observed; cycle; irreversible; loss; rate; capability; coulombic; efficiencies; reconstructed; relative; untreated; infrared laser; lithium intercalation; surface carbon; pulsed infrared; surface heat; rate capability; free surface; treated carbon; /423/
Citation Formats
Even, Jr., William R., and Guidotti, Ronald A. Lithium intercalation carbon and method for producing same. United States: N. p., 2001.
Web.
Even, Jr., William R., & Guidotti, Ronald A. Lithium intercalation carbon and method for producing same. United States.
Even, Jr., William R., and Guidotti, Ronald A. Mon .
"Lithium intercalation carbon and method for producing same". United States. https://www.osti.gov/servlets/purl/873625.
@article{osti_873625,
title = {Lithium intercalation carbon and method for producing same},
author = {Even, Jr., William R. and Guidotti, Ronald A},
abstractNote = {Disordered carbons were synthesized at 700.degree. C. from methacrylonitrile-divinylbenzene precursors. The disorder, even at the free surface, was confirmed with TEM. These powdered carbons were subjected to rapid surface heating by a pulsed infrared laser (59 MW pulses). While the bulk structure remained essentially unchanged, there was substantial "surface reconstruction" to a depth of 0.25 .mu.m presumably due to ablation, re-deposition, and "recrystallization" of the surface carbon after heating by the laser. The surface ordering appears similar to the bulk microstructure of carbons isothermally annealed at 2,200.degree. C. (i.e., turbostatic). Improvements were observed in first cycle irreversible loss, rate capability, and coulombic efficiencies of the "reconstructed" carbons, relative to the untreated carbon.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Mon Jan 01 00:00:00 EST 2001},
month = {Mon Jan 01 00:00:00 EST 2001}
}