Synthesis of LiCoPO4/C nanocomposite fiber mats as free-standing cathode materials for lithium-ion batteries with improved electrochemical properties

被引:9
作者
Belgibayeva, Ayaulym [1 ]
Nagashima, Takeru [1 ]
Taniguchi, Izumi [1 ]
机构
[1] Tokyo Inst Technol, Dept Chem Sci & Engn, 12-1 Ookayama 2,Meguro Ku, Tokyo 1528552, Japan
基金
日本学术振兴会;
关键词
LiCoPO4; SiO2; coating; Free-standing cathode; Lithium-ion batteries; Energy storage; OLIVINE LICOPO4; PERFORMANCE; COMPOSITES; STABILITY; LIPF6; FILMS;
D O I
10.1016/j.electacta.2022.140400
中图分类号
O646 [电化学、电解、磁化学];
学科分类号
081704 ;
摘要
LiCoPO4/C nanocomposite fiber mats were successfully synthesized by electrospinning with a two-step heat treatment using nanostructured LiCoPO4 microparticles prepared by spray pyrolysis. The effects of the pre-oxidation temperature on the physical properties of the synthesized materials were studied. The fiber mats pre-oxidized at 425 C and subsequently annealed at 700 C in a N-2 atmosphere contained 7 wt.% carbon and the small agglomerates of LiCoPO4 nanoparticle were evenly incorporated in carbon fibers with a few hundred nanometers. This fiber mat had a high specific surface area of 338 m(2) g(-1) and a large meso-macropore volume of 0.71 cm3 g-1. It was directly used as a free-standing electrode without a binder and a current collector for lithium batteries. The cell exhibited an initial discharge capacity of 115 mAh g(-1) at 0.1 C. The effects of SiO2 coating on the electrochemical properties of LiCoPO4/C nanocomposite fiber mats were further studied. Finally, the SiO2- coated LiCoPO4/C (15 wt.%) nanocomposite fiber mat with 2 wt.% SiO2 demonstrated superior capacity retention to uncoated ones, and the initial discharge capacities reached 126 mAh g(-1) at 0.05 C and 100 mAh g(-1) at 1 C, respectively.
引用
收藏
页数:14
相关论文
共 41 条
[1]   Olivine LiCoPO4 as 4.8 V electrode material for lithium batteries [J].
Amine, K ;
Yasuda, H ;
Yamachi, M .
ELECTROCHEMICAL AND SOLID STATE LETTERS, 2000, 3 (04) :178-179
[2]   Progression of Solid Electrolyte Interphase Formation on Hydrogenated Amorphous Silicon Anodes for Lithium-Ion Batteries [J].
Arreaga-Salas, David E. ;
Sra, Amandeep K. ;
Roodenko, Katy ;
Chabal, Yves J. ;
Hinkle, Christopher L. .
JOURNAL OF PHYSICAL CHEMISTRY C, 2012, 116 (16) :9072-9077
[3]   Insights into the improved electrochemical performance of lithium-sulfur battery with free-standing SiO2/C composite nanofiber mat interlayer [J].
Belgibayeva, Ayaulym ;
Taniguchi, Izumi .
JOURNAL OF POWER SOURCES, 2021, 484
[4]   Synthesis and characterization of SiO2/C composite nanofibers as free-standing anode materials for Li-ion batteries [J].
Belgibayeva, Ayaulym ;
Taniguchi, Izumi .
ELECTROCHIMICA ACTA, 2019, 328
[5]   Phase transitions occurring upon lithium insertion-extraction of LiCoPO4 [J].
Bramnik, Natalia N. ;
Nikolowski, Kristian ;
Baehtz, Carsten ;
Bramnik, Kirill G. ;
Ehrenberg, Helmut .
CHEMISTRY OF MATERIALS, 2007, 19 (04) :908-915
[6]   Superparamagnetic magnesium ferrite/silica core-shell nanospheres: A controllable SiO2 coating process for potential magnetic hyperthermia application [J].
Das, Harinarayan ;
Debnath, Nipa ;
Arai, Takashi ;
Kawaguchi, Takahiko ;
Sakamoto, Naonori ;
Shinozaki, Kazuo ;
Suzuki, Hisao ;
Wakiya, Naoki .
ADVANCED POWDER TECHNOLOGY, 2019, 30 (12) :3171-3181
[7]   LiCoPO4-3D carbon nanofiber composites as possible cathode materials for high voltage applications [J].
Dimesso, L. ;
Spanheimer, C. ;
Jaegermann, W. ;
Zhang, Y. ;
Yarin, A. L. .
ELECTROCHIMICA ACTA, 2013, 95 :38-42
[8]   Challenges in the development of advanced Li-ion batteries: a review [J].
Etacheri, Vinodkumar ;
Marom, Rotem ;
Elazari, Ran ;
Salitra, Gregory ;
Aurbach, Doron .
ENERGY & ENVIRONMENTAL SCIENCE, 2011, 4 (09) :3243-3262
[9]   Mechanism of a Lithiated Interlayer for Improving the Cycle Life of High Voltage Li-Ion Batteries Using a Commercial Carbonate Electrolyte [J].
Fan, Danyang ;
Lu, Dongsheng ;
Wu, Siyong ;
Zeng, Ronghua ;
He, Jia ;
Shu, Dong ;
Cai, Yuepeng .
JOURNAL OF PHYSICAL CHEMISTRY C, 2020, 124 (15) :8057-8066
[10]   Non-flammable electrolyte enables Li-metal batteries with aggressive cathode chemistries [J].
Fan, Xiulin ;
Chen, Long ;
Borodin, Oleg ;
Ji, Xiao ;
Chen, Ji ;
Hou, Singyuk ;
Deng, Tao ;
Zheng, Jing ;
Yang, Chongyin ;
Liou, Sz-Chian ;
Amine, Khalil ;
Xu, Kang ;
Wang, Chunsheng .
NATURE NANOTECHNOLOGY, 2018, 13 (08) :715-+