Lithium intercalation carbon and method for producing same
- 3019 Florida St. NE., Albuquerque, NM 87110
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.
- Research Organization:
- Sandia National Laboratories (SNL), Albuquerque, NM, and Livermore, CA (United States)
- DOE Contract Number:
- AC04-94AL85000
- Assignee:
- Even, Jr., William R. (4254 Drake Way, Livermore, CA 94550);Guidotti, Ronald A. (3019 Florida St. NE., Albuquerque, NM 87110)
- Patent Number(s):
- US 6207124
- OSTI ID:
- 873625
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
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
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