共 49 条
Hierarchically porous nitrogen-rich carbon derived from wheat straw as an ultra-high-rate anode for lithium ion batteries
被引:225
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
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).
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页码:9684 / 9690
页数:7
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