Novel preparation and electrochemical characteristics of Li3V2(PO4)3/C composite materials

作者：Zhang, Yu; Wang, Yingbo; Su, Zhi^*

来源：Journal of the Australian Ceramic Society, 2017, 53(2): 539-543.

DOI：10.1007/s41779-017-0065-3

• Li3V2(PO4)(3)/C
• Two-step reaction
• Biomass feedstocks
• Bamboo
• Electrochemical performance

A carbon-coated Li3V2(PO4)(3) material was prepared by a two-step reaction using a kind of biomass feed-stocks, bamboo, as the reaction carrier. The structure and morphology were detected by X-ray diffraction (XRD), transmission electron microscopy (TEM), and X-ray photoelectron spectroscopy (XPS). Its electrochemical properties were assessed using a constant current test; the results showed stable cycle performance and a high discharge capacity. Its specific capacity can reach 132.8 mAh g(-1) at 0.2 C under the voltage range of 2-4.3 V. After 160 cycles, the retention of the initial discharge capacity was 92.2%. The simulated data for the charge-transfer resistance and the calculated value of lithium ion diffusion coefficient were 89.76 Omega and 1.47 x 10(-11) cm s(-1), respectively, indicating that this material exhibits excellent ionic and electronic conductivity.

• 出版日期2017-10
• 单位新疆师范大学