期刊
ENERGY & ENVIRONMENTAL SCIENCE
卷 9, 期 4, 页码 1251-1257出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c6ee00023a
关键词
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资金
- IT RAMP
- D program of MOTIE/KEIT (Development of Li-rich Cathode and Carbon-free Anode Materials for High Capacity/High Rate Lithium Secondary Batteries) [10046309]
- Korea Evaluation Institute of Industrial Technology (KEIT) [10046309, 10046306] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Nano-engineering of silicon anodes has contributed to the demonstration of a promising potential for high energy lithiumion batteries, through addressing the degradation of battery performance derived from severe volume changes during cycling. However, the practical use of nano-engineered silicon anodes is still stuck because of remaining challenges, such as the low tap density, poor scalability and inferior electrical properties. Herein, we successfully developed a new Fe-Cu-Si ternary composite (FeCuSi) by scalable spray drying and facile heat treatment. As a result, FeCuSi exhibited remarkable initial Coulombic efficiency (91%) and specific capacity (1287 mA h g(-1)). In order to exactly characterize the electrical properties of FeCuSi and directly compare them with industrially developed benchmarking samples such as silicon monoxide (SiO) and a silicon-metal alloy (Siw(2)Fe), both half-cell and full-cell tests were performed with high electrode density (1.6 g cc(-1)) and high areal capacity (3.4 mA h cm(-2)). Overall, FeCuSi outperformed the benchmarking samples in terms of discharge capacity and capacity retention in high mass loading for 300 cycles.
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