Application of mixed expanded graphite as negative electrode material of lithium-ion capacitor

• Main Authors: XIANG HUAZHENG, ZHANG YONG
• Format: Patent
• Language: Chinese; English
• Published: 18.05.2018
• 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 discloses application of mixed expanded graphite as a negative electrode material of a lithium-ion capacitor. The lithium-ion capacitor includes a positive plate, a negative plate, a diaphragm and an electrolyte, wherein the negative electrode material used by the negative plate adopts microcrystalline graphite and crystalline flake graphite to be mixed to prepare the mixed expandedgraphite material, and then the mixed expanded graphite material is used as a raw material to prepare the lithium-ion capacitor. The microcrystalline graphite is large in reserves in China, is low inthe price, and is mostly utilized with low additional value, and the invention provides a high-additional-value utilization way for the microcrystalline graphite. 本发明公开了种混合膨胀石墨作为锂离子电容器负极材料的应用，本发明中锂离子电容器包括正极片、负极片、隔膜和电解液，其中负极片所用的负极材料采用微晶石墨和鳞片石墨混合制备混合膨胀石墨材料，然后以此为原料制备锂离子电容器，中国的微晶石墨储量大，价格便宜，大多为低附加值利用，本发明为微晶石墨提供了种高附加值利用途径。