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作 者:谢秋生[1,2] 王磊[1,2,3] 刘萍[1,2]
机构地区:[1]上海杉杉科技有限公司,上海201209 [2]宁波杉杉新材料科技有限公司,浙江宁波315177 [3]浙江大学,浙江杭州310027
出 处:《炭素技术》2016年第3期43-46,共4页Carbon Techniques
基 金:中国博士后科学基金第56批面上项目(2014M561754);2014年度浙江省博士后科研项目
摘 要:以淀粉为原料,采用酶化水解法制成多孔淀粉,进一步高温炭化后制备多孔淀粉硬炭。通过XRD、拉曼光谱、SEM分别表征了酶化多孔淀粉硬炭与未酶化淀粉硬炭的微观结构及形貌。通过电化学性能分析表明,酶化多孔淀粉硬炭具有高首次可逆放电容量、高首次库伦效率、优异的倍率充放电及循环性能。生物质淀粉硬炭原料价格低廉、制备过程环境友好,有望在锂离子电池领域得到应用。Porous starch was prepared by enzymatic hydrolysis method using starch as a raw material. Porous starch hard carbon was prepared by further high temperature carbonization. The microstructures and morphologies of the prepared enzymatic hydrolysis surface-medified starch-based hard carbon and pristine starch-based hard carbon were characterized by XRD, Raman spectrometer and SEM measurements. It is indicated by the analysis of electrochemical performance, that the enzymatic hydrolysis porous starch- based hard carbon shows a high reversible capacity, high first coulombic efficiency, excellent high-rate capability and good cyclabil- ity. Biomass starch-base hard carbon materials may be applied to the lithium-ion battery field due to the environmental friendliness of the preparation process and the low cost of raw materials.
分 类 号:TQ424.19[化学工程] TM911.15[电气工程—电力电子与电力传动]
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