Effect of ionic substitutions on the physicochemical, morphological, and electrochemical properties of lithium-rich vanadium phosphate and pyrophosphate compounds

被引：12
作者：
Abdel-Aziz, Ahmed [1 ]
Shenouda, Atef Y. [1 ]
Sanad, M. M. S. [1 ]
Kishore, Brij [2 ]
Khalil, H. F. Y. [3 ]
El-Sabbah, M. M. B. [3 ]
机构：
[1] CMRDI, POB 87, Tebbin, Helwan, Egypt
[2] Univ Warwick, Coventry, W Midlands, England
[3] Al Azhar Univ, Chem Dept, Fac Sci, Cairo, Egypt
来源：
IONICS | 2019年 / 25卷 / 03期
关键词：
Ionic substitution; Sol-gel synthesis; Lithium-ion battery; High-voltage cathode; LI9V3(P2O7)(3)(PO4)(2) CATHODE MATERIAL; DOPED LI9V3(P2O7)(3)(PO4)(2); ELECTRODE MATERIALS; NANOPOROUS CARBON; PERFORMANCE; BATTERIES; SUPERCAPACITORS; LI3V2(PO4)(3); BEHAVIOR; LIFEPO4;
D O I：
10.1007/s11581-019-02843-7
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：
The new Na/Cr-bisubstituted lithium vanadium monodiphosphate compound (LNVCPP) Li9-xNaxV2.8Cr0.2(P2O7)(3)(PO4)(2), where x=0.0, 0.5, 1.0, 1.5, and 2.0 have been prepared via simple sol-gel combustion route. The as-prepared materials are characterized by XRD, FESEM, and EDX. The XRD data indicate the presence of single phase of Li9-xNaxV2.8Cr0.2 (P2O7)(3)(PO4)(2) (x=0.0-2.0) with trigonal structure. Both cycle performance and rate capability have shown improvement with moderate Na-doping content. Cell of Li8.5Na0.5V2.8Cr0.2(P2O7)(3)(PO4)(2) cathode delivers a specific discharge capacity of 53mAhg(-1) after 35 cycles in comparison with the other samples. The optimum ratio Li8.5Na0.5VCPP coated with carbon delivers a specific discharge capacity of about 75mAhg(-1) after 25 cycles. Therefore, it presents the good electrochemical rate and cyclic stability. The enhancement of the rate and cyclic capability may be attributed to the optimizing particle size, morphologies, and structural stability with the proper amount of Na-doping (x=0.5) in Li sites.
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收藏
页码：969 / 980
页数：12
相关论文
共 33 条
[1]  
Atef Y, 2008, J POWER SOURCES, V185, P1386, DOI [10.1016/j.jpowsour.2008.08.042, DOI 10.1016/J.JPOWSOUR.2008.08.042]
[2]   Facile Synthesis and Electrochemical Investigation of Li9V3 (P2O7)3(PO4)2 as High Voltage Cathode for Li-Ion Batteries [J].
Balasubramanian, P. ;
Mancini, M. ;
Axmann, P. ;
Wohlfahrt-Mehrens, M. .
JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 2017, 164 (01) :A6047-A6053
[3]   Challenges Facing Lithium Batteries and Electrical Double-Layer Capacitors [J].
Choi, Nam-Soon ;
Chen, Zonghai ;
Freunberger, Stefan A. ;
Ji, Xiulei ;
Sun, Yang-Kook ;
Amine, Khalil ;
Yushin, Gleb ;
Nazar, Linda F. ;
Cho, Jaephil ;
Bruce, Peter G. .
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 2012, 51 (40) :9994-10024
[4]   Electrode materials for lithium secondary batteries prepared by sol-gel methods [J].
Fu, LJ ;
Liu, H ;
Li, C ;
Wu, YP ;
Rahm, E ;
Holze, R ;
Wu, HQ .
PROGRESS IN MATERIALS SCIENCE, 2005, 50 (07) :881-928
[5]   Designing Multielectron Lithium-Ion Phosphate Cathodes by Mixing Transition Metals [J].
Hautier, Geoffroy ;
Jain, Anubhav ;
Mueller, Tim ;
Moore, Charles ;
Ong, Shyue Ping ;
Ceder, Gerbrand .
CHEMISTRY OF MATERIALS, 2013, 25 (10) :2064-2074
[6]   A novel approach to exploit LiFePO4 compound as an ambient temperature high capacity anode material for rechargeable lithium batteries [J].
Kalaiselvi, N ;
Doh, CH ;
Park, CW ;
Moon, SI ;
Yun, MS .
ELECTROCHEMISTRY COMMUNICATIONS, 2004, 6 (11) :1110-1113
[7]   Reversible and High-Capacity Nanostructured Electrode Materials for Li-Ion Batteries [J].
Kim, Min Gyu ;
Cho, Jaephil .
ADVANCED FUNCTIONAL MATERIALS, 2009, 19 (10) :1497-1514
[8]   A comparative study of Li8NaV3(P2O7)3(PO4)2 and Li9V3(P2O7)3(PO4)2: Synthesis, structure and electrochemical properties [J].
Kuang, Quan ;
Zhao, Yanming ;
Dong, Youzhong ;
Fan, Qinghua ;
Lin, Xinghao ;
Liu, Xudong .
JOURNAL OF POWER SOURCES, 2016, 306 :337-346
[9]   Synthesis, Structure, Electronic, Ionic, and Magnetic Properties of Li9V3(P2O7)3(PO4)2 Cathode Material for Li-Ion Batteries [J].
Kuang, Quan ;
Zhao, Yanming ;
Xu, Jiantie .
JOURNAL OF PHYSICAL CHEMISTRY C, 2011, 115 (16) :8422-8429
[10]   Layered monodiphosphate Li9V3(P2O7)3(PO4)2: A novel cathode material for lithium-ion batteries [J].
Kuang, Quan ;
Xu, Jiantie ;
Zhao, Yanming ;
Chen, Xiaolong ;
Chen, Liquan .
ELECTROCHIMICA ACTA, 2011, 56 (05) :2201-2205
1234