Carbon material for lithium ion battery negative electrode and preparation method for carbon material, lithium ion battery negative electrode and lithium ion battery

• Main Authors: LIU JUNQING, SHENG YING, WANG XIANHONG, LIANG WENBIN, TANG KUN, ZHENG DONGFANG, REN YU, XUE JIAYU, GONG XIAOYI, LAI SHIYAO
• Format: Patent
• Language: Chinese; English
• Published: 29.06.2016
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

The invention provides a preparation method for a carbon material for a lithium ion battery negative electrode. The preparation method comprises the steps of performing polymerization on coal liquefaction residue, stabilizing the polymerization product and performing carbonization on the stabilized product. The invention provides the carbon material for the lithium ion battery negative electrode prepared by the method provided by the invention. The invention provides the lithium ion battery negative electrode, wherein the negative electrode contains the carbon material provided by the invention. The invention provides a lithium ion battery, wherein the negative electrode of the lithium ion battery contains the carbon material provided by the invention. According to the preparation method, the coal liquefaction residue is directly taken as the raw material; a thermal polymerization method is adopted without requiring a catalyst; the carbon material for the lithium ion battery negative electrode is prepared by