Porous carbon material mainly comprising mesoporous structure and having relatively small specific surface area and lithium storage application of porous carbon material

• Main Authors: FENG WEN, HU JUN, LIANG CHU, CHEN MIAOXIN, WU HAIHUANG, XIONG MEICHAI, FAN MEIQIN
• Format: Patent
• Language: Chinese; English
• Published: 25.08.2023
• Subjects: BASIC ELECTRIC ELEMENTS; CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES ORLIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE; ELECTRICITY

The invention belongs to the field of material preparation and the field of energy storage devices, and particularly relates to a porous carbon material with a mesoporous structure as a main part and a small specific surface area and lithium storage application of the porous carbon material. The porous carbon material disclosed by the invention is relatively low in crystallinity and has more mesopores, the pore diameter of the porous carbon material is concentrated at 2-12nm, the specific surface area is 100-300m < 2 >/g, the pore distribution is uniform, and the structure is stable. The invention discloses a lithium ion capacitor using the porous carbon material as a negative electrode material. The lithium ion capacitor shows a working voltage of 2-4.2 V; under the current density of 2.0 A/g, the capacity retention ratio reaches 84% of long cycle life after 10000 cycles; under the condition that only the mass of positive and negative active substances is calculated, the power density can be up to 12400W/kg,