A Si–SnSb/pyrolytic PAN composite anode for lithium-ion batteries

• Published in: Electrochimica acta Vol. 53; no. 24; pp. 7048 - 7053
• Main Authors: Zhao, Jishi, Wang, Li, He, Xiangming, Wan, Chunrong, Jiang, Changyin
• Format: Journal Article
• Language: English
• Published: Oxford Elsevier Ltd 15.10.2008; Elsevier
• Subjects: Applied sciences; Carbothermal reduction; Direct energy conversion and energy accumulation; Electrical engineering. Electrical power engineering; Electrical power engineering; Electrochemical conversion: primary and secondary batteries, fuel cells; Exact sciences and technology; Lithium-ion battery; Polyvinyl chloride (PVC); Si–SnSb alloy; Si–SnSb/pyrolytic PAN; Lithium-ion battery; Si–SnSb/pyrolytic PAN; Si–SnSb alloy; Carbothermal reduction; Polyvinyl chloride (PVC); Anode; Tin alloy; Antimony alloy; Electrode material; Thermal reaction; Discharge charge cycle; Surface structure; Energetic efficiency; Composite electrode; Silicon; Polyvinyl chloride; Electrical characteristic; Modified material; Differential scanning calorimetry; Scanning electron microscopy; Thermogravimetry; Secondary cell; Acrylonitrile polymer; Morphology; Preparation; Polyvinyl chloride (PVC);Si-SnSb alloy;Si-SnSb/pyrolytic PAN;Carbothermal reduction;Lithium-ion battery; Lithion ion batteries; Thermal analysis; Specific capacity
• ISSN: 0013-4686; 1873-3859
• DOI: 10.1016/j.electacta.2008.05.040

Polyvinyl chloride (PVC) powders are introduced as carbon sources to prepare Si–SnSb alloy based on carbothermal method. Then the as-prepared alloy was mixed with pyrolytic polyacrylonitrile (PAN) to synthesize a composite anode of Si–SnSb/ pyrolytic polyacrylonitrile (PAN) with the pyrolysis of PAN at 400 °C and 600 °C. The material exhibits a high-specific capacity and a good-cycling stability due to its multiphase characteristics. The Si–SnSb blended with PAN pyrolyzed at 600 °C shows better electrochemical performance, its initial Coulombic efficiency is 62.6%, and the specific capacity is 658.4 mAh g −1 after the 10th cycle. The pyrolytic PAN improves the performance of the Si–SnSb alloy by means of dispersing the alloy efficiently, and the pyrolytic PAN enhances the performance of the pure alloy simultaneously.