Lithium ion battery negative electrode material: (1) carbon material: graphit carbon material, amorphous carbon material. Such as graphite, soft carbon, intermediate phase carbon microspheres have been developed and studied, hard carbon, carbon nanotubes, and Pakistani ball C60, etc. are being studied. (2) Other materials: nitride, silicon-based materials, tin-based materials, new alloys, nano oxides, and the like.Negative electrode material: Multiple graphite. New studies have found that titanate may be better materials. Negative electrode reaction: lithium ion is disengaged at the time of discharge, and the lithium ion is inserted during charging. When charging: XLI + XE6C-LiXC6 is discharged: LiXC6 → XLI + XE + 6C is generally divided into the following:
The first is carbon negative electrode material: graphitized carbon material, amorphous carbon material. Such as graphite, soft carbon, intermediate phase carbon microspheres have been developed and studied, hard carbon, carbon nanotubes, and Pakistani ball C60, etc. are being studied. The negative electrode material actually used for lithium-ion batteries is basically carbon material, such as artificial ink, natural graphite, intermediate phase carbon microspheres, petroleum coke, carbon fiber, pyrolysis resin carbon, and the like. The second is a tin-based anode material: two oxides and tin-based composite oxides which can be divided into tin. Oxides refer to oxides of various valence metal tin. No commercial products.
"Previously, because the coal did not have anything, the factory did not think of the production method. Until the April environmental inspection, the factory realized the seriousness of the problem, began to explore the method of replacing the coal with natural gas." We arrive I tried to use natural gas to burn glass in the field factory. Jiang Jianguo said, but when the natural gas is not asged as a coal, it is more concentrated. When the firepower is more concentrated, more people need to be controlled. To this end, the company manager Sun Hongli found a professional company to design the natural gas program, "in the firing process If you design a warming curve, the firing effect is not much different from the burning coal. "In the last environmental inspection, Sun Hongli told the law enforcement personnel, but has not received a reply.
The third is a lithium-containing transition metal nitride anode material without a commercial product.
The fourth is alloy aperture material: including tin based alloys, silicon-based alloys, based alloys, aluminum-based alloys, ladders, magnesium-based alloys and other alloys, no commercial products.
The fifth is the nano-scale negative electrode material: nano-carbon tube, nano-alloy material.
Six kinds of nanomaterials are nano-oxide materials: At present, Hefei Xiangzheng Technology Co., Ltd. According to the market development of the 2009 lithium battery new energy industry * new trends, many companies have begun to add nano-oxide and nano silica to the previous tradition. Inside the graphite, tin oxide, nano-carbon tube, greatly improve the amount of charge and charge and discharge of the lithium battery.
Several concepts related to lithium-ion battery negative electrode materials
Electrochemical capacity: The active material of the unit quality is charged or discharged to * to a large extent, generally expressed by MAH / g.
Inverse capacity loss: During charge and discharge, the charge and discharge efficiency of the electrode is less than 100%, and the electrochemical capacity of the discharge is lower than charging, and the loss of the loss is referred to as irreversible capacity loss. Electrode potential: The electrode potential of the ideal negative electrode material should be close to metal lithium, and the amount of embedding with lithium is different. The electrode potential of the graphite is between 0.4V to 0.0V, which is a suitable negative electrode material.
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Charge and discharge rate: The reaction battery is slow.
Recycling: The ability of electrode material to maintain electrochemical capacity during repeated charge discharge. The battery cycle is related to the structural stability, chemical stability, and thermal stability of the electrode material.
Lithium-ion battery negative material
(1) The voltage hysteresis, i.e., lithium embedded reaction (relative to Li + / Li) between 0 ~ 0.25V, and the deinterlergery reaction occurs around 1V;
(2) It is theoretically further deepening. This depends on various high-purity, structural regulatory raw materials and carbon materials, and the establishment of a more effective structure characterization method.
Lithium-ion battery negative material development direction
(1) Smaller nanoscale is lithium structure.
(2) Preparation of high purity and regular microstructure carbon negative electrode materials.
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