標題: Ultrafine CoO Embedded Reduced Graphene Oxide Nanocomposites: A High Rate Anode for Li-Ion Battery
作者: Bindumadhavan, Kartick
Yeh, Ming-Hsiu
Chou, Tsu-Chin
Chang, Pei-Yi
Doong, Rueyan
環境工程研究所
Institute of Environmental Engineering
關鍵字: CoO-rGO nanocomposites;ultrafine particles;high-rate anode;reversible capacity;lithium ion battery (LIB)
公開日期: 1-十一月-2016
摘要: A novel and simple strategy for the synthesis of cobalt oxide decorated reduced graphene oxide (CoO-rGO) nanocomposites was developed as a high performance anode for lithium ion battery (LIB). The CoO-rGO nanocomposites were prepared by simultaneous reduction of GO and Co2+ in the presence of NaBH4. Addition of 15 wt% rGO produced a narrow size distribution of ultra-fine CoO nanoparticles with nano-dimensional contact between CoO and rGO leading to an excellent electrochemical performance. The reversible capacity of CoO-rGO nanocomposites is between 1140 and 1260 mAh/g at the current density of 150 mA/g and sustained at 473 mAh/g at high current density of 2400 mA/g. In addition to the excellent rate capability of 15 wt% CoO-rGO, a reversible capacity of 690 mAh/g is achieved at 600 mA/g after 60 cycles. In addition, XPS spectra and XRD patterns of CoO-rGO after cycling clearly indicate the involvement of electrolyte into CoO nanoparticles during intercalation-deintercalation cycling, and lead to the transformation of Co species from Co2+ to Co3+ for the enhanced electrochemical performance at high current density.
URI: http://dx.doi.org/10.1002/slct.201601099
http://hdl.handle.net/11536/144076
ISSN: 2365-6549
DOI: 10.1002/slct.201601099
期刊: CHEMISTRYSELECT
Volume: 1
起始頁: 5758
結束頁: 5767
顯示於類別:期刊論文