熔盐辅助合成r-BN纳米片及其电化学性能  

Molten Salt-Assisted Synthesis of r-BN Nanosheets and Its Electrochemical Performance

作　　者：王杏[1] 陈洋[1] 邓承继[1] 余超[1] 丁军[1] 祝洪喜[1] WANG Xing;CHEN Yang;DENG Chengji;YU Chao;DING Jun;ZHU Hongxi(The State Key Laboratory of Refractories and Metallurgy,Wuhan University of Science and Technology,Wuhan 430081,China)

机构地区：[1]武汉科技大学,省部共建耐火材料与冶金国家重点实验室,武汉430081

出　　处：《硅酸盐学报》2021年第6期1041-1047,共7页Journal of The Chinese Ceramic Society

基　　金：国家自然科学基金(51574187,51502215,51602232);湖北省自然科学基金创新群体项目(2018CFA022);武汉科技大学研究生创新创业基金(JCX201904)。

摘　　要：以KBH_(4)和NH_(4)Cl为原料,NaCl和KCl为熔盐介质,在1100℃合成了高纯度的r-BN纳米片。研究了无盐和熔盐两种方法对合成r-BN物相组成和晶体形貌的影响,并测试了r-BN的电化学性能。结果表明:与不添加熔盐方法相比,采用熔盐方法能够在相同温度下制备出结晶性高和形貌好的片状r-BN;r-BN表现出较好的循环稳定性;在1 A/g的电流密度下r-BN的比电容值为16.35 F/g,且r-BN显示出较小的电荷转移电阻和内部电阻。The high-purity r-BN nanosheets were synthesized at 1100℃by using KBH_(4)and NH_(4)Cl as raw materials,NaCl and KCl as molten salt medias.The effects of salt-free and molten-salt methods on the phase composition and crystal morphology of r-BN were studied.And the electrochemical performance of r-BN was tested.Compared with the salt-free method,the molten-salt method can be used to prepare high-crystallinity and good-shaped sheet r-BN at the same temperature.r-BN shows good cycle stability.The specific capacitance of r-BN at a current density of 1 A/g is 16.35 F/g,and r-BN shows a small charge-transfer resistance and internal resistance.

关 键 词：熔盐 菱形氮化硼 物相 显微结构 电化学性能 

分 类 号：TQ174[化学工程—陶瓷工业]