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1. 发明申请

US20200156945A1 NOVEL CARBON NANOFIBER HAVING EMBEDDED CARBON NANOTUBES, AND METHOD OF MANUFACTURE 审中-公开
公开(公告)号：US20200156945A1
公开(公告)日：2020-05-21
申请号：US16198185
申请日：2018-11-21
申请人： Cence Inc.
发明人： Sunshine HOLMBERG , Stoyan Atanassov RADKOV
IPC分类号： C01B32/166 , D01F9/12
摘要： A method of producing Stress Activated Pyrolytic Carbon-Carbon NanoTube (SAPC-CNT) fibers is disclosed. The fibers are a composite consisting of a tubular core of pristine graphite planes that include carbon nanotubes (CNTs) surrounded by semi-graphitic carbon material that includes Stress Activated Pyrolytic Carbon (SAPC), the SAPC being characterized by wavy graphite planes ranging from 0.1 nm to 1 nm and oriented parallel to the axis of each fiber, the semi-graphitic carbon material also being characterized by an inclusion of 4 to 10 atomic percent of nitrogen heteroatoms, the nitrogen heteroatoms including an above 60% of quaternary and pyridinic nitrogen groups.

2. 发明申请

US20200056303A1 Novel carbon nanofiber and method of manufacture 审中-公开
公开(公告)号：US20200056303A1
公开(公告)日：2020-02-20
申请号：US15998860
申请日：2018-08-17
申请人： Cence Inc.
发明人： Sunshine Holmberg , Stoyan Atanassov Radkov
IPC分类号： D01F9/22 , C01B32/15 , D01D5/00 , D01D1/02
摘要： A method of producing carbon nanofibers is disclosed that substantially impacts the carbon nanofibers' chemical and physical properties. Such carbon nanofibers include a semi-graphitic carbon material characterized by wavy graphite planes ranging from 0.1 nm to 1 nm and oriented parallel to an axis of a respective carbon nanofiber, the semi-graphitic carbon material also being characterized by an inclusion of 4 to 10 atomic percent of nitrogen heteroatoms, the nitrogen heteroatoms including a combined percentage of quaternary and pyridinic nitrogen groups equal to or greater than 60% of the nitrogen heteroatoms. The method of manufacture includes, for example, preparing a Polyacrylonitrile (PAN) based precursor solution, providing the PAN-based precursor solution to a spinneret and then performing an electro-spinning operation on the PAN-based precursor solution to create the one or more PAN-based nanofibers. The electro-spinning operation includes passing the PAN-based precursor solution from the spinneret to a collector at a distance between 1 cm to 30 cm while providing an Alternating Current (AC) voltage between the spinneret and the collector, the AC voltage including a frequency ranging from 20 Hz to 100,000 Hz and either a Peak-to-Peak (P-P) voltage ranging from 100 V to 30,000 V or a Root-Mean-Square (RMS) voltage ranging from 100 V to 30,000 V. Afterwards, post-electro-spinning operations, stabilizing treatments and pyrolysis treatments are performed.

3. 发明授权

US11597652B2 Carbon nanofiber having embedded carbon nanotubes, and method of manufacture 有权
公开(公告)号：US11597652B2
公开(公告)日：2023-03-07
申请号：US16198185
申请日：2018-11-21
申请人： Cence Inc.
发明人： Sunshine Holmberg , Stoyan Atanassov Radkov
IPC分类号： B32B9/00 , C01B32/166 , D01F9/12 , B82Y30/00 , B82Y40/00
摘要： A method of producing Stress Activated Pyrolytic Carbon-Carbon NanoTube (SAPC-CNT) fibers is disclosed. The fibers are a composite consisting of a tubular core of pristine graphite planes that include carbon nanotubes (CNTs) surrounded by semi-graphitic carbon material that includes Stress Activated Pyrolytic Carbon (SAPC), the SAPC being characterized by wavy graphite planes ranging from 0.1 nm to 1 nm and oriented parallel to the axis of each fiber, the semi-graphitic carbon material also being characterized by an inclusion of 4 to 10 atomic percent of nitrogen heteroatoms, the nitrogen heteroatoms including an above 60% of quaternary and pyridinic nitrogen groups.

4. 发明授权

US11180870B2 Carbon nanofiber and method of manufacture 有权
公开(公告)号：US11180870B2
公开(公告)日：2021-11-23
申请号：US15998860
申请日：2018-08-17
申请人： Cence Inc.
发明人： Sunshine Holmberg , Stoyan Atanassov Radkov
IPC分类号： D01F9/22 , C01B32/15 , D01D1/02 , D01D5/00 , D01D10/02 , D01D11/00 , D01F11/12
摘要： A method of producing carbon nanofibers is disclosed that substantially impacts the carbon nanofibers' chemical and physical properties. Such carbon nanofibers include a semi-graphitic carbon material characterized by wavy graphite planes ranging from 0.1 nm to 1 nm and oriented parallel to an axis of a respective carbon nanofiber, the semi-graphitic carbon material also being characterized by an inclusion of 4 to 10 atomic percent of nitrogen heteroatoms, the nitrogen heteroatoms including a combined percentage of quaternary and pyridinic nitrogen groups equal to or greater than 60% of the nitrogen heteroatoms. The method of manufacture includes, for example, preparing a Polyacrylonitrile (PAN) based precursor solution, providing the PAN-based precursor solution to a spinneret and then performing an electro-spinning operation on the PAN-based precursor solution to create the one or more PAN-based nanofibers. The electro-spinning operation includes passing the PAN-based precursor solution from the spinneret to a collector at a distance between 1 cm to 30 cm while providing an Alternating Current (AC) voltage between the spinneret and the collector, the AC voltage including a frequency ranging from 20 Hz to 100,000 Hz and either a Peak-to-Peak (P-P) voltage ranging from 100 V to 30,000 V or a Root-Mean-Square (RMS) voltage ranging from 100 V to 30,000 V. Afterwards, post-electro-spinning operations, stabilizing treatments and pyrolysis treatments are performed.

5. 发明申请

US20210189598A1 NOVEL CARBON NANOFIBER AND METHOD OF MANUFACTURE 有权
公开(公告)号：US20210189598A1
公开(公告)日：2021-06-24
申请号：US17269215
申请日：2019-10-20
申请人： Cence Inc.
发明人： Sunshine HOLMBERG , Stoyan Atanassov RADKOV
IPC分类号： D01D5/00 , D01D11/00 , D01F11/12 , D01F9/22 , D01D10/02 , C01B32/15
摘要： A method of producing carbon nanofibers is disclosed that substantially impacts the carbon nanofibers' chemical and physical properties. Such carbon nanofibers include a semi-graphitic carbon material characterized by wavy graphite planes ranging from 0.1 nm to 1 nm and oriented parallel to an axis of a respective carbon nanofiber, the semi-graphitic carbon material also being characterized by an inclusion of 4 to 10 atomic percent of nitrogen heteroatoms, the nitrogen heteroatoms including a combined percentage of quaternary and pyridinic nitrogen groups equal to or greater than 60% of the nitrogen heteroatoms. The method of manufacture includes, for example, preparing a Polyacrylonitrile (PAN) based precursor solution, providing the PAN-based precursor solution to a spinneret and then performing an electro-spinning operation on the PAN-based precursor solution to create the one or more PAN-based nanofibers. The electro-spinning operation includes passing the PAN-based precursor solution from the spinneret to a collector at a distance between 1 cm to 30 cm while providing an Alternating Current (AC) voltage between the spinneret and the collector, the AC voltage including a frequency ranging from 20 Hz to 100,000 Hz and either a Peak-to-Peak (P-P) voltage ranging from 100 V to 30,000 V or a Root-Mean-Square (RMS) voltage ranging from 100 V to 30,000 V. Afterwards, post-electro-spinning operations, stabilizing treatments and pyrolysis treatments are performed.

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