I claim:
1. A method for the structural modification of monofilaments, the method comprising the steps of:
a) treating a monofilament material with laser light absorbing additives;
b) extruding said monofilament material into a monofilament;
c) stretching said monofilament;
d) stabilizing said monofilament; and
e) exposing said monofilament to laser light for structural modification of said monofilament.
2. The method of claim 1, wherein step e) precedes step c).
3. The method of claim 1, wherein step c) precedes step e).
4. The method of claim 1, wherein step d) precedes step e).
5. The method of claim 1, wherein at least two monofilaments of a union of monofilaments are extruded with one of additives differently absorbing laser light and laser light-absorbing additives in differing concentrations.
6. The method of claim 1, wherein said laser light absorbing additives are added during step b) to simultaneously fulfil a further technical function during monofilament use.
7. The method of claim 1, further comprising introducing, during step b), additives with a further technical function in monofilament use.
8. The method of claim 1, wherein step e) precedes step d).
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. An olivine-based positive active material for a rechargeable lithium battery represented by the following Chemical Formula 1:
LixMyM\u2032zXO4-wBw\u2003\u2003Chemical Formula 1
wherein, M and M\u2032 are each independently elements selected from the group consisting of Fe, Ni, Co, Mn, Cr, Zr, Nb, Cu, V, Mo, Ti, Zn, Al, Ga, Mg, B, and a combination thereof, X is an element selected from the group consisting of P, As, Bi, Sb, Mo, and a combination thereof, B is an element selected from the group consisting of F, S, and a combination thereof, 0<x\u22661.2, 0.98\u2266y<1, 0<z\u22660.02, and 0\u2266w\u22660.5.
2. The olivine-based positive active material of claim 1, wherein M\u2032 is Co.
3. The olivine-based positive active material of claim 1, wherein X is P.
4. The olivine-based positive active material of claim 1, wherein w is 0.
5. The olivine-based positive active material of claim 1, wherein M\u2032 is Co and w is 0.
6. The olivine-based positive active material of claim 1, wherein M\u2032 is Co and X is P.
7. The olivine-based positive active material of claim 1, wherein X is P and w is 0.
8. The olivine-based positive active material of claim 1, wherein M\u2032 is Co, X is P and w is 0.
9. The olivine-based positive active material of claim 1, wherein y and z are in the following ranges: 0.99\u2266y<1 and 0<z\u22660.01, respectively.
10. A rechargeable lithium battery, comprising:
a positive electrode, negative electrode, and a separator between the positive electrode and negative electrode,
wherein the positive electrode comprises a current collector and a positive active material layer disposed on the current collector, and the positive active material layer comprises an olivine-based positive active material represented by the following Chemical Formula 1, a conductive material, and a binder:
LixMyM\u2032zXO4-wBw\u2003\u2003Chemical Formula 1
wherein, M and M\u2032 are each independently elements selected from the group consisting of Fe, Ni, Co, Mn, Cr, Zr, Nb, Cu, V, Mo, Ti, Zn, Al, Ga, Mg, B, and a combination thereof, X is an element selected from the group consisting of P, As, Bi, Sb, Mo, and a combination thereof, B is an element selected from the group consisting of F, S, and a combination thereof, 0<x\u22661.2, 0.98\u2266y<1, 0<z\u22660.02, and 0\u2266w\u22660.5.
11. The rechargeable lithium battery of claim 10, wherein M\u2032 is Co.
12. The rechargeable lithium battery of claim 10, wherein X is P.
13. The rechargeable lithium battery of claim 10, wherein w is 0.
14. The rechargeable lithium battery of claim 10, wherein y and z are in the following ranges: 0.99\u2266y<1 and 0<z\u22660.01, respectively.
15. The rechargeable lithium battery of claim 10, wherein the binder comprises at least one selected from the group consisting of polyvinyl alcohol, carboxylmethylcellulose, hydroxypropylcellulose, diacetylcellulose, polyvinylchloride, carboxylated polyvinylchloride, polyvinylfluoride, an ethylene oxide-containing polymer, polyvinylpyrrolidone, polyurethane, polytetrafluoroethylene, polyvinylidene fluoride, polyethylene, polypropylene, a styrene-butadiene rubber, an acrylated styrene-butadiene rubber, an epoxy resin, and nylon.
16. The rechargeable lithium battery of claim 10, wherein the conductive material comprises at least one selected from the group consisting of natural graphite, artificial graphite, carbon black, acetylene black, ketjen black, a carbon fiber, copper, nickel, aluminum, silver, a metal fiber, and a polyphenylene derivative.
17. The rechargeable lithium battery of claim 10, wherein the separator is a single or multiple layer selected from the group consisting of polyethylene, polypropylene, and polyvinylidene fluoride.
18. The rechargeable lithium battery of claim 10, wherein M\u2032 is Co and w is 0.
19. The rechargeable lithium battery of claim 10, wherein M\u2032 is Co and X is P.
20. The rechargeable lithium battery of claim 10, wherein M\u2032 is Co, X is P and w is 0.