摘要
以MnSO_4·H_2O和(NH_4)_2C_2O_4·H_2O为原料,葡萄糖为碳源,通过T形微反应器用直接沉淀法合成多孔碳(C)包覆一氧化锰(MnO)复合材料,并研究陈化时间对材料结构、形貌及电化学性能的影响。随着陈化时间的延长,前驱体及MnO/C由棒状演变为团聚块状体,前驱体及MnO/C材料的结晶度增加,MnO/C的比表面积减小,电化学性能变差。陈化时间为0时,合成的MnO/C以2 C在0.01~3.00 V循环100次,放电比容量为844 m Ah/g,5 C放电比容量为699 m Ah/g。
Porous carbon coating manganese oxide（MnO/C）composite materials were prepared by a direct precipitation in T-shaped microreactor,using MnSO4·H2O and（NH4）2C2O4·H2O as raw materials and glucose as carbon source.The influences of aging time on the structure,morphology and electrochemical performance of the prepared MnO/C were studied.As the aging time prolonged,the precursors and MnO/C evolved from the rod-like to agglomerated bulk particles.When the crystallinity of precursor and MnO/C material increased,the specific surface area and electrochemical performance of MnO/C decreased.The MnO/C prepared with aging time of 0 delivered a specific discharge capacity of 844 m Ah/g after 100 cycles at 2 C in 0.01-3.00 V.The5 C specific discharge capacity was 699 m Ah/g.
作者
喻航
蒋芳
苏静
文衍宣
YU Hang;JIANG Fang;SU Jing;WEN Yan-xuan(School of Chemistry of and Chemical Engineering,Guangxi University,Nanning,Guangxi 530004,China;Guangxi Key Laboratory of Processing for Non-ferrous Metallic and Featured Materials,Guangxi University,Nanning,Guangxi 530004,China;Guangxi Novel Battery Materials Research Center of Engineering Technology,Nanning,Guangxi 530004,China;Guangxi Colleges and Universities Key Laboratory of Novel Energy Materials and Related Technology,Nanning,Guangxi 530004,China)
出处
《电池》
CAS
CSCD
北大核心
2018年第5期294-298,共5页
Battery Bimonthly
基金
国家自然科学基金(51564002)
