کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
192346 | 459739 | 2008 | 6 صفحه PDF | دانلود رایگان |
Porous (P-) and dense (D-) lithium titanate (Li4Ti5O12) powders as an anode material for lithium-ion batteries have been synthesized by spray drying followed by solid-state calcination. Electrochemical testing results showed that the discharge capacities of P-Li4Ti5O12 are 144 mAh/g, 128 mAh/g and 73 mAh/g at the discharging rate of 2C, 5C and 20C, respectively (cut-off voltages: 0.5–2.5 V). The corresponding values for D-Li4Ti5O12 are 108 mAh/g, 25 mAh/g and 17 mAh/g. The higher capacity of the P-Li4Ti5O12 at high charge/discharge rates was attributed to the shorter transport path of Li ions and higher electronic conductivity in the P-Li4Ti5O12 as a result of its smaller primary particle size and higher surface area compared with those of the D-Li4Ti5O12.
Journal: Electrochimica Acta - Volume 53, Issue 24, 15 October 2008, Pages 7242–7247