硼、氮共掺杂多孔碳的制备及其超电容性能  

Preparation and supercapacitive properties of B,N co-doped porous carbons

作　　者：王天云 韩娜 贾德东 李宏强 何孝军[1] WANG Tian-Yun;HAN Na;JIA De-Dong;LI Hong-Qiang;HE Xiao-Jun(School of Chemistry and Chemical Engineering,Anhui University of Technology,Maanshan,Anhui 243002,China)

机构地区：[1]安徽工业大学化学与化工学院,马鞍山243002

出　　处：《无机化学学报》2023年第2期309-316,共8页Chinese Journal of Inorganic Chemistry

基　　金：国家自然科学基金(No.52072002,51872005)资助。

摘　　要：分别以含氮菲咯啉、四硼酸钾和醋酸锌为碳源、活化剂和模板,制备了B、N共掺杂多孔碳(BN-PC),并探究模板质量对BN-PC结构和储电性能的影响。当醋酸锌质量为5 g时,所得BN-PC_(5)中B、N杂原子含量分别为20.21%、18.29%。电化学测试结果表明,以6 mol·L^(-1)KOH为电解液,BN-PC_(5)电极展现出高的比电容(在0.05 A·g^(-1)电流密度下为255 F·g^(-1))、优异的倍率性能(在20 A·g^(-1)电流密度下为188 F·g^(-1))和卓越的循环稳定性(在5 A·g^(-1)的电流密度下循环10000次比电容保持率为97%)。以3mol·L^(-1)ZnSO_(4)为电解液,在平均功率密度为56 W·kg^(-1)时,BN-PC_(5)电容器的能量密度可达27 Wh·kg^(-1)。Herein,we employed(CH3COO)2Zn as template to prepare B,N co-doped porous carbons(BN-PC)by using phenanthroline as precursor and N source,K2B4O7as B source.The effect of template mass on the structure and electric storage properties of BN-PC_(5)was investigated.When the mass of(CH3COO)2Zn was 5 g,the B and N heteroatom content of BN-PC_(5)was 20.21%and 18.29%,respectively.As the electrode materials for supercapacitors,BN-PC_(5)exhibited a high specific capacitance of 255 F·g^(-1)at 0.05 A·g^(-1),an excellent rate performance of 188A·g^(-1)at 20 A·g^(-1)and outstanding cycle stability with 97%of initial capacitance retention after 10000 cycles in 6mol·L^(-1)KOH aqueous electrolyte.The energy density of BN-PC_(5)capacitor reached 27 Wh·kg^(-1)at an average power density of 56 W·kg^(-1)in 3 mol·L^(-1)ZnSO_(4)aqueous electrolyte.

关 键 词：能量密度 共掺杂 多孔碳 电化学 超级电容器 

分 类 号：O646.21[理学—物理化学]