Catalytic Synthesis of Hard/Soft Carbon Hybrids with Heteroatom Doping for Enhanced Sodium Storage

被引：14

作者：

Liu, Xu ^{[1
]}

Zhu, Youyu ^{[1
]}

Liu, Na ^{[2
]}

Chen, Mingming ^{[1
]}

Wang, Chengyang ^{[1
]}

Wang, Xiaolei ^{[3
]}

机构：

[1] Tianjin Univ, Key Lab Green Chem Technol, Collaborat Innovat Ctr Chem Sci & Engn, Minist Educ,Sch Chem Engn & Technol, Tianjin 300350, Peoples R China

[2] HengShui Univ, Dept Chem, Hengshui 053000, Hebei, Peoples R China

[3] Conocordia Univ, Dept Chem & Mat Engn, Montreal, PQ, Canada

来源：

CHEMISTRYSELECT | 2019年 / 4卷 / 12期

关键词：

Catalytic graphitization; Hard; soft carbon hybrid; Heteroatom doping; Rate capability; Sodium-ion battery; HIERARCHICAL POROUS CARBON; ION BATTERIES; MECHANISTIC INSIGHTS; ANODE MATERIALS; PERFORMANCE; GRAPHENE; LITHIUM; GRAPHITIZATION; NANOPARTICLES; AEROGELS;

D O I：

10.1002/slct.201900501

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Hard carbon shows a promising application for sodium storage but suffers from low electrochemical stability, which leads to poor rate capacity and cycle life. Here, we report a heteroatom-doping hard/soft carbon hybrid prepared by easy oxidizing acid treatment and low temperature catalytic graphitization. The heteroatoms increase the sodium-ion adsorption capability during slope region, showing an important contribution at high current. Besides, the introduction of oriented domains enhances the conductivity, as well as the heteroatom doping, and electrochemical stability of hard/soft carbon hybrids. What's more, these structure characteristics also benefit the stable storage of sodium ions, supported by a 74% increase in terms of reversible capacity. Thus, the electrochemical performance retains a fast and reversible capacity of 125 mAh.g(-1) at high current density of 8 C.

引用

页码：3551 / 3558

页数：8

共 51 条

[1] Building better batteries [J].