B/N共掺杂多孔碳片的制备及其储钾性能  

Preparation of B/N co-doped porous carbon sheets and their potassium storage properties

作　　者：韩娜 张冬冬 武婷婷 杨磊 李宏强 何孝军[1] HAN Na;ZHANG Dong-dong;WU Ting-ting;YANG Lei;LI Hong-qiang;HE Xiao-jun(School of Chemistry and Chemical Engineering,Anhui University of Technology,Ma’anshan 243002,China)

机构地区：[1]安徽工业大学化学与化工学院,安徽马鞍山243002

出　　处：《燃料化学学报（中英文）》2023年第6期863-872,共10页Journal of Fuel Chemistry and Technology

基　　金：国家自然科学基金(52072002,51872005)资助。

摘　　要：以甘氨酸为碳源和氮源、硼酸为模板和硼源,采用一步碳化法制备了二维B/N共掺杂多孔碳片(BNCSs)。通过水洗即可除去硼酸模板,合成方法绿色环保。BNCSs上短的孔道缩短了钾离子的传输距离,丰富的微孔提供了大量的储钾活性位点。此外,BNCSs中较高的B/N掺杂量提升了碳基质的缺陷度,扩大了碳层间距,有利于钾离子的吸附、嵌入和脱嵌。钾离子半电池性能的测试结果表明,BNCS800电极展现出高的比容(在0.05 A/g电流密度下为310 mA·h/g)、优异的倍率性能(在2 A/g电流密度下为100 mA·h/g)和良好的循环稳定性(在1 A/g下循环1000次后容量保持率为75.9%)。In this paper,two-dimensional B/N co-doped porous carbon sheets(BNCSs)were prepared by one-step carbonization using glycine as carbon source and nitrogen source,boric acid as template and boron source.The boric acid template can be removed by water washing,and the synthesis method is green and environmentally friendly.The short pores in BNCSs shorten the transport distance of potassium ions,and the abundant micropores provide a large number of potassium storage active sites.In addition,the higher B/N doping in BNCSs increases the defect degree of carbon matrix,expands the carbon layer spacing,and is conducive to the adsorption,insertion and de-insertion of potassium ions.The measurement results of potassium ion half cell performance indicate that BNCS800 electrode shows high specific capacity(310 mA·h/g at 0.05 A/g),excellent rate performance(100 mA·h/g at 2 A/g)and good cycle stability(after 1000 cycles at 1 A/g,the capacity retention is 75.9%).This work provides a simple strategy for preparing cathode materials with high capacity and long life.

关 键 词：B/N共掺杂 二维 多孔碳 钾离子电池 

分 类 号：O646[理学—物理化学]