Nitrogen-doping of chemically reduced mesocarbon microbead oxide for the improved performance of lithium ion batteries

被引：103

作者：

Han, Pengxian ^{[1
]}

Yue, Yanhua ^{[1
]}

Zhang, Lixue ^{[1
]}

Xu, Hongxia ^{[1
]}

Liu, Zhihong ^{[1
]}

Zhang, Kejun ^{[1
]}

Zhang, Chuanjian ^{[1
]}

Dong, Shanmu ^{[1
]}

Ma, Wen ^{[1
]}

Cui, Guanglei ^{[1
]}

机构：

[1] Chinese Acad Sci, Qingdao Inst Bioenergy & Bioproc Technol, Qingdao 266101, Peoples R China

来源：

CARBON | 2012年 / 50卷 / 03期

基金：

中国国家自然科学基金;

关键词：

LI STORAGE PROPERTIES; ANODE MATERIAL; ELECTROCHEMICAL IMPEDANCE; CARBON; GRAPHITE; GRAPHENE; INSERTION; CHALLENGES; REDUCTION; COMPOSITE;

D O I：

10.1016/j.carbon.2011.11.007

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：

Nitrogen was doped into chemically-reduced mesocarbon microbead oxide (CR-MCMBO) through simple annealing in ammonia at 800 degrees C, and the Li-ion storage properties of the prepared nitrogen-doped CR-MCMBO (NR-MCMBO) was studied. It was found that NR-MCMBO shows a highly reversible capacity of 762 mAh g(-1) at 20 mA g(-1) during the first charge process, which is much higher than that of the pristine MCMB (289 mAh g(-1)), and the specific capacity of NR-MCMBO still had a value of 535 mAh g(-1) after 200 cycles. When the current density reaches 1000 mA g(-1), the specific capacity of NR-MCMBO is 388 mAh g(-1). The high reversible capacity of NR-MCMBO is attributed to the high amount of pyridinic nitrogen and the large number of defects induced by oxidation and nitrogen-doping. Moreover, the open pores constituted by graphene-like nanoplatelets on the spherical NR-MCMBO surface facilitate the diffusion of Li ions. Crown Copyright (C) 2011 Published by Elsevier Ltd. All rights reserved.

引用

页码：1355 / 1362

页数：8

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