Energy storage in composites of a redox couple host and a lithium ion host

被引:46
作者
Kim, Sung-Wook [1 ]
Nam, Kyung-Wan [2 ]
Seo, Dong-Hwa [1 ]
Hong, Jihyun [1 ]
Kim, Hyungsub [1 ]
Gwon, Hyeokjo [3 ]
Kang, Kisuk [1 ]
机构
[1] Seoul Natl Univ, Dept Mat Sci & Engn, Seoul 151742, South Korea
[2] Brookhaven Natl Lab, Dept Chem, Upton, NY 11973 USA
[3] Korea Adv Inst Sci & Technol, Dept Mat Sci & Engn, Taejon 305701, South Korea
关键词
Energy storage; Li -ion batteries; Electrochemistry; Positive electrode; Composite materials; CATHODE MATERIAL; HIGH-POWER; NANOCOMPOSITE; FLUORIDE;
D O I
10.1016/j.nantod.2012.04.004
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
The quest for new positive electrodes for rechargeable lithium-ion batteries has been escalating in recent years. Until now, candidates of positive electrode were limited to crystals that contain both redox-active element (usually transition-metal) and lithium ion in the open framework with few exceptions. Here, we demonstrate lithium-free compounds, a material with little activity by itself, can be activated electrochemically by addition of LiF after the first charging. This general strategy is exemplified in various lithium-free iron compounds. Reversible lithium ion extraction and reinsertion take place for Fe2+F2, Fe2+ SO4, and Fe22+P2O7, when blended with LiF in nanoscale, in which a simultaneous valence change of Fe2+/3+ occurs above 3 V. FeF2-LiF could deliver 190 mAh g(-1) (similar to 3.53 V) at 50 mA g(-1) which is even higher energy density than that crystalline LiFePO4 can offer. Various combinations of blending are possible using this approach, which can bring a new branch of material group for positive electrodes in lithium-ion batteries. (C) 2012 Elsevier Ltd. All rights reserved.
引用
收藏
页码:168 / 173
页数:6
相关论文
共 21 条
[1]   Building better batteries [J].
Armand, M. ;
Tarascon, J. -M. .
NATURE, 2008, 451 (7179) :652-657
[2]   Carbon-metal fluoride nanocomposites -: Structure and electrochemistry of FeF3:C [J].
Badway, F ;
Pereira, N ;
Cosandey, F ;
Amatucci, GG .
JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 2003, 150 (09) :A1209-A1218
[3]   Nano-ionics in the context of lithium batteries [J].
Balaya, P. ;
Bhattacharyya, A. J. ;
Jamnik, J. ;
Zhukovskii, Yu. F. ;
Kotomin, E. A. ;
Maier, J. .
JOURNAL OF POWER SOURCES, 2006, 159 (01) :171-178
[4]   Bismuth fluoride nanocomposite as a positive electrode material for rechargeable lithium batteries [J].
Bervas, M ;
Badway, F ;
Klein, LC ;
Amatucci, GG .
ELECTROCHEMICAL AND SOLID STATE LETTERS, 2005, 8 (04) :A179-A183
[5]   Nanomaterials for rechargeable lithium batteries [J].
Bruce, Peter G. ;
Scrosati, Bruno ;
Tarascon, Jean-Marie .
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 2008, 47 (16) :2930-2946
[6]   First-Principles Investigation of the Li-Fe-F Phase Diagram and Equilibrium and Nonequilibrium Conversion Reactions of Iron Fluorides with Lithium [J].
Doe, Robert E. ;
Persson, Kristin A. ;
Meng, Y. Shirley ;
Ceder, Gerbrand .
CHEMISTRY OF MATERIALS, 2008, 20 (16) :5274-5283
[7]   Flexible energy storage devices based on graphene paper [J].
Gwon, Hyeokjo ;
Kim, Hyun-Suk ;
Lee, Kye Ung ;
Seo, Dong-Hwa ;
Park, Yun Chang ;
Lee, Yun-Sung ;
Ahn, Byung Tae ;
Kang, Kisuk .
ENERGY & ENVIRONMENTAL SCIENCE, 2011, 4 (04) :1277-1283
[8]   Electrodes with high power and high capacity for rechargeable lithium batteries [J].
Kang, KS ;
Meng, YS ;
Bréger, J ;
Grey, CP ;
Ceder, G .
SCIENCE, 2006, 311 (5763) :977-980
[9]   Fabrication of FeF3 Nanoflowers on CNT Branches and Their Application to High Power Lithium Rechargeable Batteries [J].
Kim, Sung-Wook ;
Seo, Dong-Hwa ;
Gwon, Hyeokjo ;
Kim, Jongsoon ;
Kang, Kisuk .
ADVANCED MATERIALS, 2010, 22 (46) :5260-5264
[10]   Carbon nanotube-amorphous FePO4 core-shell nanowires as cathode material for Li ion batteries [J].
Kim, Sung-Wook ;
Ryu, Jungki ;
Park, Chan Beum ;
Kang, Kisuk .
CHEMICAL COMMUNICATIONS, 2010, 46 (39) :7409-7411