WO2026064449 - MONOMER POLYMERIZATION WITH SULFUR AND CARBON NANOTUBES
National phase entry is expected:
Publication Number
WO/2026/064449
Publication Date
26.03.2026
International Application No.
PCT/US2025/046875
International Filing Date
18.09.2025
Title **
[English]
MONOMER POLYMERIZATION WITH SULFUR AND CARBON NANOTUBES
[French]
POLYMÉRISATION DE MONOMÈRE AVEC DU SOUFRE ET DES NANOTUBES DE CARBONE
Applicants **
ZETA ENERGY LLC
Inventors
SALVATIERRA, Rodrigo, Villegas
Priority Data
63/696,640
19.09.2024
US
Application details
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International Searching Authority |
USPTO
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| Recordal of a Change of the Applicant's Name/Address |
Change of Applicant's Name and Address
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| Type of Assignment |
The Standard Agent's Assignment
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| Applicant's Legal Status |
Legal Entity
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| Entry into National Phase under |
Chapter I
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| Patent Delivery |
Send the Letters Patent by Courier
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| Translation |
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Quotation for National Phase entry
| Country | Stages | Total | |
|---|---|---|---|
| China | Filing, Examination, Granting | 2043 | |
| EPO | Filing, Examination, Granting | 11576 | |
| Japan | Filing, Examination, Granting | 2093 | |
| South Korea | Filing, Examination, Granting | 2004 | |
| USA | Filing, Examination, Granting | 4310 |
Total:
22,026
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Abstract[English]
A method for producing sulfurizcd-carbon cathode materials for electrochemical cells involves mixing carbon nanofibers, sulfur, and a monomer (e.g., acrylonitrile) to form a mixture, polymerizing the monomer to encapsulate the nanofibers and sulfur within a polymer matrix (e.g., polyacrylonitrile), and pyrolyzing the matrix to chemically bond carbon from the polymer to the nanofibers and sulfur, yielding sulfurized-carbon particles fused to the nanofibers. The pyrolyzed material forms a fluffy powder that is compressed into a free-standing dry film, wherein the nanofibers and longer nanofiber yarns create a three-dimensional conductive network enhancing mechanical stability and electrical conductivity. The film is laminated to a current collector to form a cathode. Optional pore- loading with molecular sulfur improves capacity and cycle life, achieving >70% sulfur utilization without wet processing solvents.[French]
La présente invention concerne un procédé de production de matériaux de cathode à base de carbone sulfuré pour des cellules électrochimiques qui consiste à mélanger des nanofibres de carbone, du soufre et un monomère (par exemple, de l'acrylonitrile) pour former un mélange, à polymériser le monomère pour encapsuler les nanofibres et le soufre dans une matrice polymère (par exemple, le polyacrylonitrile), et à pyrolyser la matrice pour lier chimiquement le carbone du polymère aux nanofibres et au soufre, ce qui permet d'obtenir des particules de carbone sulfuré fusionnées aux nanofibres. Le matériau pyrolysé forme une poudre en flocons qui est comprimée pour former un film sec autonome, les nanofibres et les fils de nanofibres plus longs créant un réseau conducteur tridimensionnel améliorant la stabilité mécanique et la conductivité électrique. Le film est stratifié sur un collecteur de courant pour former une cathode. Une charge de pores facultative avec du soufre moléculaire améliore la capacité et la durée de vie, ce qui permet d'obtenir plus de 70 % d'utilisation de soufre sans solvants de traitement humides.