氮掺杂碳层包覆金属钴颗粒与氮掺杂石墨烯纳米复合材料作为高容量锂离子电池负极材料（英文）  

N-Doped Carbon-Encapsulated Cobalt Nanoparticles on N-Doped Graphene Nanosheets as a High-Capacity Anode Material for Lithium-Ion Storage

作　　者：耿凯明 吴俊杰[1] 耿洪波[1] 胡亚云[1] 瞿根龙 潘越[1] 郑军伟[2] 顾宏伟[1] 

机构地区：[1]苏州大学材料与化学化工学部,江苏省有机合成重点实验室,苏州纳米科学技术协同创新中心,苏州215123 [2]苏州大学物理与光电·能源学部,苏州215123

出　　处：《无机化学学报》2016年第9期1495-1502,共8页Chinese Journal of Inorganic Chemistry

基　　金：国家自然科学基金(No.21373006);江苏省省属高校自然科学基金(No.14KJB430021);江苏高校优势学科建设工程(PAPD)资助项目

摘　　要：合成了一种石墨烯基纳米复合材料即:由氮掺杂碳层包覆的金属钴纳米颗粒,充分分散于氮掺杂的石墨烯表面。这种纳米复合材料进一步提高了石墨烯的导电性,增加了石墨烯的储锂容量。该材料被用作锂离子电池负极材料,在性能测试中展现了良好的循环性能,在以100 m A·g-1的电流密度循环200圈后,放电容量高达950.1 m Ah·g-1,库伦效率约为98%。A graphene-based anode material is demonstrated：N-doped carbon-encapsulated cobalt nanoparticles on N-doped graphene nanosheets（NC@Co@NG）,in which cobalt nanoparticles encapsulated by N-doped carbon layer are highly dispersed on the N-doped graphene nanosheets,forming multiple sites for electrical conductivity enhancement and lithium insertion.When used as anode materials in lithium-ion batteries,the nanocomposites exhibit outstanding electrochemical performance,including a considerably large reversible capacity of 950.1 m Ah·g-1after 200 cycles at a current density of 100 m A·g-1and Coulombic efficiency of 98%.

关 键 词：钴纳米颗粒 氮掺杂的石墨烯 负极材料 锂离子电池 

分 类 号：TB333[一般工业技术—材料科学与工程]