Preparation method and application of graphene-carbon nanotube/cobalt manganese alloy oxide nanosheet compound

• Main Authors: LI ERHAO, DU LIN
• Format: Patent
• Language: Chinese; English
• Published: 22.06.2018
• Subjects: BASIC ELECTRIC ELEMENTS; CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES ORLIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE; ELECTRICITY; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGYGENERATION, TRANSMISSION OR DISTRIBUTION; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE

The invention provides a preparation method and application of a graphene-carbon nanotube/cobalt manganese alloy oxide nanosheet compound. The preparation method includes: pre-dispersing commercial graphene-carbon nanotubes; using a uniform suspension of the graphene-carbon nanotubes as a substrate to grow out cobalt manganese alloy oxide nanosheets of a mesoporous structure to obtain the graphene-carbon nanotube/cobalt manganese alloy oxide nanosheet compound. The compound prepared by the method can be used for lithium sulfur batteries or supercapacitor anode composite materials, and electrochemical performance of lithium sulfur batteries or pseudocapacitors assembled by the compound is remarkably improved when compared with that of pure graphene-carbon nanotube or cobalt manganese alloy. 本发明提供种石墨烯-碳纳米管/钴锰合金氧化物纳米片复合物的制备方法。其制备方法包括商业石墨烯-碳纳米管的预分散，再以石墨烯-碳纳米管的均悬浮液为衬底生长出介孔结构的钴锰合金氧化物纳米片，得到石墨烯-碳纳米管/钴锰合金氧化物纳米片复合物。本发明制得的石墨烯-碳纳米管/钴锰合金氧化物纳米片复合物可以用于锂硫电池或超级电容器正极复合材料，其所组装的锂硫电池或赝电容相对于单纯的石墨烯-碳纳米管或钴锰合金显著提高了电化学性能。