Hierarchically porous nitrogen-rich carbon derived from wheat straw as an ultra-high-rate anode for lithium ion batteries

被引：229

作者：

Chen, Li ^{[1
]}

Zhang, Yongzhi ^{[2
]}

Lin, Chaohong ^{[3
]}

Yang, Wen ^{[3
]}

Meng, Yan ^{[3
]}

Guo, Yong ^{[1
]}

Li, Menglong ^{[1
]}

Xiao, Dan ^{[1
,2
]}

机构：

[1] Sichuan Univ, Coll Chem, Chengdu 610064, Peoples R China

[2] Sichuan Univ, Inst New Energy & Low Carbon Technol, Chengdu 610065, Peoples R China

[3] Sichuan Univ, Coll Chem Engn, Chengdu 610065, Peoples R China

来源：

JOURNAL OF MATERIALS CHEMISTRY A | 2014年 / 2卷 / 25期

关键词：

CAPACITIVE ENERGY-STORAGE; HYDROTHERMAL CARBONIZATION; LIGNOCELLULOSIC BIOMASS; GRAPHENE NANOSHEETS; MESOPOROUS CARBON; RATE CAPABILITY; PERFORMANCE; SUPERCAPACITORS; INSERTION; GRAPHITE;

D O I：

10.1039/c4ta00501e

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：

A facile, economical and effective method to produce hierarchically porous nitrogen-rich carbon (HPNC) from wheat straw has been reported. Acid pretreatment is introduced before KOH activation, and plays the role of promoting the formation of thinner pore walls. Without any N-doping, the N content is as high as 5.13%. The HPNC when used as an anode for Li-ion batteries exhibits a superior specific capacity of 1470 mA h g(-1) at 0.037 A g(-1), and possesses an ultrahigh rate capability of 344 mA h g(-1) at 18.5 A g(-1). Even at an extremely high current density of 37 A g(-1), the reversible capacity is still as high as 198 mA h g(-1).

引用

页码：9684 / 9690

页数：7

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