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.
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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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