Dual-Carbon Network for the Effective Transport of Charged Species in a LiFePO4 Cathode for Lithium-Ion Batteries

被引：12
作者：
Ding, Bo [1 ,2 ]
Ji, Ge [2 ]
Sha, Zhou [3 ]
Wu, Jishan [3 ]
Lu, Li [4 ]
Lee, Jim Yang [1 ,2 ]
机构：
[1] Natl Univ Singapore, Ctr Life Sci CeLS, Grad Sch Integrat Sci & Engn, Singapore 117456, Singapore
[2] Natl Univ Singapore, Dept Chem & Biomol Engn, Singapore 119260, Singapore
[3] Natl Univ Singapore, Dept Chem, Singapore 117543, Singapore
[4] Natl Univ Singapore, Dept Mech Engn, Singapore 117576, Singapore
来源：
ENERGY TECHNOLOGY | 2015年 / 3卷 / 01期
关键词：
carbon; charge transport; graphene; lithium-ion batteries; LiFePO4; CAPACITY FADING MECHANISM; ELECTRICAL-CONDUCTIVITY; PHOSPHO-OLIVINES; GRAPHENE; PERFORMANCE; ENERGY; ELECTRODE; NANOCOMPOSITE; REDUCTION; IRON;
D O I：
10.1002/ente.201402117
中图分类号：
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号：
0807 ; 0820 ;
摘要：
Cost and safety considerations have driven up the interest in LiFePO4 as a lithium-ion battery cathode material. Carbon nanopainting is currently the most common approach to increase the power density of LiFePO4, but more can be done to improve the application performance further. In this study the rate performance of LiFePO4 was increased by using a conductive dual-carbon network that can extract and conduct electrons from the Li+ storage host more effectively than common pyrolyzed carbon. The dual-carbon network consists of a connected network of graphene sheets and a nanoscale continuous coating of pyrolyzed conductive carbon on the surface of the aggregated LiFePO4 nanocrystals. Such a construction supports fast electron transport between the aggregated LiFePO4 nanocrystals as well as within them. Consequently the LiFePO4/C composite fabricated as such delivered very high rate performances even at very high discharge rates (104 mAhg(-1) at 50 C where 1 C= 170 mAg(-1)).
引用
收藏
页码：63 / 69
页数：7
相关论文
共 50 条
[1]   Aging Mechanisms of LiFePO4 // Graphite Cells Studied by XPS: Redox Reaction and Electrode/Electrolyte Interfaces [J].
Castro, L. ;
Dedryvere, R. ;
Ledeuil, J. -B. ;
Breger, J. ;
Tessier, C. ;
Gonbeau, D. .
JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 2012, 159 (04) :A357-A363
[2]   The electronic properties of graphene [J].
Castro Neto, A. H. ;
Guinea, F. ;
Peres, N. M. R. ;
Novoselov, K. S. ;
Geim, A. K. .
REVIEWS OF MODERN PHYSICS, 2009, 81 (01) :109-162
[3]   Graphene-Encapsulated Hollow Fe3O4 Nanoparticle Aggregates As a High-Performance Anode Material for Lithium Ion Batteries [J].
Chen, Dongyun ;
Ji, Ge ;
Ma, Yue ;
Lee, Jim Yang ;
Lu, Jianmei .
ACS APPLIED MATERIALS & INTERFACES, 2011, 3 (08) :3078-3083
[4]   Reducing carbon in LiFePO4/C composite electrodes to maximize specific energy, volumetric energy, and tap density [J].
Chen, ZH ;
Dahn, JR .
JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 2002, 149 (09) :A1184-A1189
[5]   Microscale measurements of the electrical conductivity of doped LiFePO4 [J].
Chung, SY ;
Chiang, YM .
ELECTROCHEMICAL AND SOLID STATE LETTERS, 2003, 6 (12) :A278-A281
[6]   Electronically conductive phospho-olivines as lithium storage electrodes [J].
Chung, SY ;
Bloking, JT ;
Chiang, YM .
NATURE MATERIALS, 2002, 1 (02) :123-128
[7]   A novel concept for the synthesis of an improved LiFePO4 lithium battery cathode [J].
Croce, F ;
D'Epifanio, A ;
Hassoun, J ;
Deptula, A ;
Olczac, T ;
Scrosati, B .
ELECTROCHEMICAL AND SOLID STATE LETTERS, 2002, 5 (03) :A47-A50
[8]   Identification of electron donor states in N-doped carbon nanotubes [J].
Czerw, R ;
Terrones, M ;
Charlier, JC ;
Blase, X ;
Foley, B ;
Kamalakaran, R ;
Grobert, N ;
Terrones, H ;
Tekleab, D ;
Ajayan, PM ;
Blau, W ;
Rühle, M ;
Carroll, DL .
NANO LETTERS, 2001, 1 (09) :457-460
[9]   Size effects on carbon-free LiFePO4 powders [J].
Delacourt, C. ;
Poizot, P. ;
Levasseur, S. ;
Masquelier, C. .
ELECTROCHEMICAL AND SOLID STATE LETTERS, 2006, 9 (07) :A352-A355
[10]   Effect of surface carbon structure on the electrochemical performance of LiFePO4 [J].
Doeff, MM ;
Hu, YQ ;
McLarnon, F ;
Kostecki, R .
ELECTROCHEMICAL AND SOLID STATE LETTERS, 2003, 6 (10) :A207-A209
12345