Porous nitrogen-doped carbon vegetable-sponges with enhanced lithium storage performance

被引：99

作者：

Li, Xiaona ^{[1
,2
]}

Zhu, XiaoBo ^{[1
,2
]}

Zhu, Yongchun ^{[1
,2
]}

Yuan, Zhengqiu ^{[1
,2
]}

Si, LuLu ^{[1
,2
]}

Qian, Yitai ^{[1
,2
,3
]}

机构：

[1] Univ Sci & Technol China, Hefei Natl Lab Phys Sci Microscale, Hefei 230026, Anhui, Peoples R China

[2] Univ Sci & Technol China, Dept Chem, Hefei 230026, Anhui, Peoples R China

[3] Shandong Univ, Sch Chem & Chem Engn, Jinan 250100, Peoples R China

来源：

CARBON | 2014年 / 69卷

关键词：

ION BATTERIES; ANODE MATERIAL; GRAPHENE SHEETS; RATE CAPABILITY; NANOFIBER WEBS; NANOTUBES; CAPACITY; FILMS; BORON; NANOSTRUCTURES;

D O I：

10.1016/j.carbon.2013.12.059

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Porous nitrogen-doped carbon vegetable-sponges (N-DCSs) have been fabricated by chemical treatment of the. Cu@C precursors using HNO3 for the first time. The obtained N-DCSs are porous three-dimensional (3D)-structure and similar to numerous agglomerated fluffy micro-vegetable-sponges. When the precursors are treated by H2SO4, carbon vegetablesponges (CSs) without nitrogen doping are prepared. As anode materials in lithium ion batteries, the as-prepared N-DCSs show improved Li-storage capacity and cycling stability as compared with the pure CSs. They offer 870 mA h g(-1) at 0.5 A ci after 300 cycles and high reversible capacity with 910 mA h g(-1) at 0.2 A g(-1) after cycled at different current densities, which are much higher than those of CSs. It is envisaged that the large surface area, unique 3D porous nanostructure and appropriate nitrogen doping are favorable for the superior electrochemical properties of N-DCSs. (C) 2014 Elsevier Ltd. All rights reserved.

引用

页码：515 / 524

页数：10

共 60 条

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