TY - JOUR
T1 - Hydrothermal synthesis and electrochemical performance of nanoparticle Li2FeSiO4/C cathode materials for lithium ion batteries
AU - Xu, Yimeng
AU - Shen, Wei
AU - Wang, Cong
AU - Zhang, Aili
AU - Xu, Qunjie
AU - Liu, Haimei
AU - Wang, Yonggang
AU - Xia, Yongyao
PY - 2015/6/10
Y1 - 2015/6/10
N2 - Li2FeSiO4 nanoparticles are successfully synthesized via hydrothermal approach, with the hydrothermal process monitored in detail. Structural characterizations by XRD, FTIR, SEM and HRTEM measurements reveal that the Li2FeSiO4 nanoparticles have a high crystalline degree and monodisperse nanoparticle shape with a size around of 50-200 nm. To further improve the electronic conductivity, the Li2FeSiO4 nanoparticles are coated by a carbon layer using in suit polymerization of dopamine. Moreover, the effect of carbon content for electrochemical performance of Li2FeSiO4/C is systemically investigated, and as a result, the composite with a ratio of Li2FeSiO4 and dopamine of 3:1 demonstrate the best electrochemical performance with a discharge specific capacity of 148 mA h g-1 at a rate of 0.1 C at room temperature. Furthermore, the electrochemical performance of Li2FeSiO4/C at high temperature of 55 °C is also investigated, and it also exhibits a good performance with a discharge specific capacity of 240 mA h g-1at a current rate of 0.2 C.
AB - Li2FeSiO4 nanoparticles are successfully synthesized via hydrothermal approach, with the hydrothermal process monitored in detail. Structural characterizations by XRD, FTIR, SEM and HRTEM measurements reveal that the Li2FeSiO4 nanoparticles have a high crystalline degree and monodisperse nanoparticle shape with a size around of 50-200 nm. To further improve the electronic conductivity, the Li2FeSiO4 nanoparticles are coated by a carbon layer using in suit polymerization of dopamine. Moreover, the effect of carbon content for electrochemical performance of Li2FeSiO4/C is systemically investigated, and as a result, the composite with a ratio of Li2FeSiO4 and dopamine of 3:1 demonstrate the best electrochemical performance with a discharge specific capacity of 148 mA h g-1 at a rate of 0.1 C at room temperature. Furthermore, the electrochemical performance of Li2FeSiO4/C at high temperature of 55 °C is also investigated, and it also exhibits a good performance with a discharge specific capacity of 240 mA h g-1at a current rate of 0.2 C.
KW - Cathode
KW - Hydrothermal
KW - Lithium ion batteries
KW - Lithium iron silicate
KW - Nanoparticles
UR - http://www.scopus.com/inward/record.url?scp=84961287989&partnerID=8YFLogxK
U2 - 10.1016/j.electacta.2015.03.170
DO - 10.1016/j.electacta.2015.03.170
M3 - Article
AN - SCOPUS:84961287989
VL - 167
SP - 340
EP - 347
JO - Electrochimica Acta
JF - Electrochimica Acta
SN - 0013-4686
ER -