Design and facile synthesis of nitrogen-doped carbon decorated LiVPO4F nanocrystals as superior cathode for lithium-ion batteries

作者：Yu, Zhihao; Jiang, Linhua^*

来源：Solid State Ionics, 2016, 291: 20-25.

DOI：10.1016/j.ssi.2016.04.018

• Lithium-ion batteries
• High-voltage cathode
• LiVPO4F
• Nitrogen-doped carbon
• Superior performances

In this study, nitrogen-doped carbon is coated on LiVPO4F electrode for the first time via a simple chemical refluxing process, using ethylenediamine (EDA) as the carbon and nitrogen source. The structure, morphology and microstructure of the as-prepared electrode are characterized by XRD, XPS, Raman spectra, SEM and TEM. The uniform coating of nitrogen-doped carbon improves the electronic conductivity of LiVPO4F. As cathode material for lithium-ion batteries, the nitrogen-doped carbon coated LiVPO4F composite exhibits superior rate capability and excellent cycle performance over the carbon coated LiVPO4F. The electrode delivers an initial discharge capacity of 109.6 mAh g(-1) at high rate of 10 C and 103.1 mAh g(-1) of capacity is retained after 100 cycles. Thus, this novel modification method of nitrogen-doped carbon coating is highly effective and could be widely used to optimize the electronic conductivity of other electrode materials for lithium-ion batteries.

• 出版日期2016-8
• 单位上海理工大学