▎ 摘　　要

NOVELTY - A binder-free stannic oxide/carbon fibrofelt preparing method involves dispersing graphene oxide in solution of N, N dimethylformamide ultrasonically to obtain graphene oxide suspension, followed by dissolving polyacrylonitrile dehydrate and stannous chloride in dimethylformamide solution to obtain mixed solution. The mixed solution is cooled and mixed with the suspension to obtain spinning precursor solution. The precursor solution is subjected to electrospinning, and vacuum-dried to obtain sample. The sample is subjected to pre-oxidizing treatment and annealed to obtain finished product. USE - Method for preparing binder-free stannic oxide/carbon fibrofelt that is utilized in cathode material of lithium ion battery. ADVANTAGE - The method enables preparing binder-free stannic oxide/carbon fibrofelt with improved circulation specific capacity and stability, high efficiency, wide application range, and high performance in a simple and inexpensive manner. DETAILED DESCRIPTION - A binder-free stannic oxide/carbon fibrofelt preparing method involves dispersing graphene oxide in solution of 0.01-0.1 mg/ml N, N dimethylformamide ultrasonically for 20-40 minutes to obtain graphene oxide suspension, followed by dissolving 3-10% polyacrylonitrile dehydrate and 2-6% stannous chloride in dimethylformamide solution under magnetic stirring at 40-80 degrees C for 2-6 hours to obtain mixed solution. The mixed solution is cooled and mixed with the suspension till light brown color or black color solution to be obtained. The graphene oxide is reduced to graphene to obtain spinning precursor solution. The precursor solution is transferred to 5 ml, 20 ml or 1 ml syringe, and 0.3-1.2 mm diameter stainless steel needle by using injection pump and controlling flow rate of the precursor solution to be 0.2-1.2 ml/hour, followed by using 15x 15 cm aluminum heatsink as collection plate, controlling distance between the needle and the collection plate to be 8-15 cm, maintaining the needle in a vertical position with the collection plate. The precursor solution is subjected to electrospinning under pressure of 8-15 KV. The solution is vacuum-dried at 60-80 degrees C for 10-24 hours to obtain sample. The sample is subjected to pre-oxidizing treatment at 180-240 degrees C for 1-4 hours by heating at a rate of 1-5 degrees C/minute. The resultant sample is annealed at 400-800 degrees C at a heating rate of 3-8 degrees C/minute to obtain finished product.