卷期 : 43 / 3
出版年 : 2015/07/01
本研究針對鋰離子電池負極材料進行開發,實驗中利用Modeifel Hummer製備石墨烯碳材料,並輔以高電容矽金屬材料透過自組裝包覆方式,形成石墨烯/矽鋰離子複合負極材料,經由XRD、SEM、TGA、電化學檢測等分析材料特性與電池效能。充放電測試(電流密度100mA/g)結果,首次循環可逆電容量可以達到1097mAh/g,第90次循環後電容量可維持399mAh/g,遠超過商售天然石墨負極材料的電容量320mAh/g,並經由變電流(電流密度100mA/g、300mA/g、500mA/g、1000mA/g、3000mA/g、5000mA/g、10000mA/g)充放電測試下,分別得到706mAh/g、443mAh/g、322mAh/g、259mAh/g、182mAh/g、119mAh/g、70mAh/g電容量,實驗結果顯示此材料具備快速的充電效率和高的電容量。未來可望取代現有商售天然石墨、人造石墨、MCMB等材料,成為新一代高電容負極電池材料。The research is to developed the lithium-ion batteries anode material, utilize the Modeifel method Hummer to prepare Grapheme in the experiment, and it through assembling to covering Silicon material, form Graphene/Silicon composites for lithium-ion batteries anode,the material characteristic and battery efficiency is measuremented with XRD, SEM, TGA, electrochemistry. Charge and discharge test (100mA/g) As a result, the reversible capacitance of the first circle is 1097mAh/g, capacitance can maintain 399mAh/g after 90 circles, this anode material is more excellent than graphite capacitance 320mAh/g, and change the electric current density (100 mA/g, 300mA/g, 500mA/g, 1000mA/g, 3000mA/g, 5000mA/ g, 10000mA/g) Charge and discharge and test, Result 706mAh/g, 443mAh/g, 322mAh/g, 259mAh/g, 182mAh/g, 119mAh/g, 70mAh/g capacitance, the experimental result reveals this material possesses fast charging efficiency and high capacitance. Can be expected in the future is existing to replace commercial materials such as graphite, artificial graphite, MCMB, become the high capacity lithium-ion batteries anode of new generation.
關鍵詞 : 石墨烯(Graphene)、矽(Slican)、鋰離子電池(Lithium-ion Batteries)、負極材料(Anode Material)