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Title: 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:
 [1];  [2]
  1. (4254 Drake Way, Livermore, CA 94550)
  2. 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):
Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE Y02E - REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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 = {2001},
month = {1}
}