There are about six types of negative electrode materials for cylindrical batteries: carbon negative electrode materials, alloy negative electrode materials, tin based negative electrode materials, lithium containing transition metal nitride negative electrode materials, nano scale materials, and nano scale negative electrode materials.

　　·Carbon nano material anode materials: At present, the anode materials that have been actually used in lithium ion batteries are basically carbon materials, such as artificial graphite, natural graphite, mesophase carbon microspheres, petroleum coke, carbon fiber, pyrolytic resin carbon, etc.

　　·Alloy anode materials: including tin based alloys, silicon based alloys, germanium based alloys, aluminum based alloys, antimony based alloys, magnesium based alloys and other alloys. There are no commercial products at present.

　　·Tin based cathode materials: tin based cathode materials can be divided into tin oxide and tin based composite oxide. Oxide refers to the oxide of various valence metal tin. There are no commercial products at present.

　　·At present, there is no commercial product of lithium containing transition metal nitride cathode materials.

　　·Nano materials: carbon nanotubes, nano alloy materials.

　　·Nano anode material: nano oxide material

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