【摘 要】
：
The development of environment-friendly and high energy density cathode materials is highly desired for the clean and sustainable Li-ion batteries (LIBs) system.To take advantage the effect of oxygen-
【机 构】
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Energy & Materials Engineering Centre,College of Physics and Materials Science,Tianjin Normal Univer
【出 处】
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第31届全国化学与物理电源学术年会
论文部分内容阅读
The development of environment-friendly and high energy density cathode materials is highly desired for the clean and sustainable Li-ion batteries (LIBs) system.To take advantage the effect of oxygen-containing functional groups (such as ＞C=O and-COOH) which can act as the reaction centers with lithium ions (＞C=O + Li+ + e-(→)C-O-Li) [1],graphene with oxygenic functional groups has been recently studied as cathode materials for high performance lithium-ion batteries,which could rapidly and reversibly capture lithium ions through surface adsorption and/or surface redox reaction,showing remarkable lithium storage capacity and excellent cycling stability.So this transition-metal-free functionalized graphene has shown great potential to substitute the current active inorganic cathode materials[2].
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以氧化石墨烯、正硅酸四乙酯和苯胺单体为原料,采用两步法制备了石墨烯/二氧化硅/聚苯胺三元复合材料.采用循环伏安法对材料进行电化学性能测试[1],结果表明,当氧化石墨烯与苯胺单体的投料比为1：50时,在1 MH2SO4电解液中,在扫描速度1 mV/s下,三元复合材料的比容量达554.5 F/g,远大于石墨烯/二氧化硅的比容量(144 F/g).