褐煤制备纳米级多孔碳及其电容脱盐性能  

Nanoporous Carbon Prepared from Lignite for Capacitive Deionization

作　　者：杨勇 赵春霞[1] 李骏申 羊美丽 陈文[1] YANG Yong;ZHAO Chunxia;LI Junshen;YANG Meili;CHEN Wen(School of Materials Science and Engineering,Wuhan University of Technology,Wuhan 430070,China)

机构地区：[1]武汉理工大学材料科学与工程学院,武汉430070

出　　处：《硅酸盐学报》2020年第10期1505-1511,共7页Journal of The Chinese Ceramic Society

基　　金：国家重点研发计划(2016YFB0303904)。

摘　　要：选用天然材料褐煤为原料,以KOH为活化剂,在惰性气氛下热处理制备了纳米多孔碳材料。结果表明:所制备的碳材料具有丰富的介孔和微孔,平均孔径约2 nm,比表面积可达3 135 m^2/g。以该纳米多孔碳制作成电极后,比电容量可达267 F/g,经过1 000次循环后,比电容量仍保持95%以上。用于电容脱盐时,电吸附量可达18.9 mg/g,且吸脱附循环性能优良。A nanoporous carbon material was prepared via high-temperature heat treatment with lignite as raw material and KOH as an activating agent in inertia atmosphere. The results show that nanoporous carbon has massive mesopores and micropores with an average pore size of 2 nm, and the specific surface area can reach 3 135 m^2/g. The specific capacitance of the symmetrical capacitor assembled with nanoporous carbon as an electrode is up to 267 F/g. A significant capacity retention of 95% is obtained after 1 000 cycles. The electrosorption capacity of the salt ions can reach 18.9 mg/g with a good adsorption and desorption cycle performance.

关 键 词：褐煤 纳米多孔碳 比电容量 电容脱盐 

分 类 号：TB34[一般工业技术—材料科学与工程] O646[理学—物理化学]