Details

Autor(en) / Beteiligte

• Wang, Xinwei
• Li, Yuheng
• Pei, Dexuan
• Li, Fanghong
• Xue, Ting

Titel

Synthesis and Performance of Cr Doped Li3V2(PO4)3/C Cathode Materials for Li Ion Batteries

Ist Teil von

• Integrated ferroelectrics, 2020-03, Vol.206 (1), p.56-65

Ort / Verlag

Taylor & Francis

Erscheinungsjahr

2020

Quelle

Taylor & Francis

Beschreibungen/Notizen

• A series of Cr-doped Li 3 V 2-x Cr x (PO 4 ) 3 /C (x = 0.00, 0.10, 0.15, 0.20) composites was synthesized using Sol-gel method. The influence of Cr doping on the structure, morphology and electrochemical performance of Li 3 V 2 (PO 4 ) 3 /C were studied. The X-ray diffraction patterns indicate that all of the samples are consistent with those of monoclinic Li 3 V 2 (PO 4 ) 3 , indicating that Cr 3+ can be successfully doped into the lattice of Li 3 V 2 (PO 4 ) 3 . Scanning electron microscopy, transmission electron microscopy mages revealed the morphology and the uniform distribution of Cr in the samples. In the potential range of 3.0-4.3 V, the Li 3 V 1.9 Cr 0.1 (PO 4 ) 3 /C composite exhibited the highest discharge capacity of 125.1 mAh/g at 0.1 C, while the Li 3 V 1.8 Cr 0.2 (PO 4 ) 3 /C performed a capacity of 95.8 mAhg −1 with a high capacity retention ratio of 91.6% after 40 circles, which is still lower than the capacity of the Li 3 V 1.9 Cr 0.1 (PO 4 ) 3 /C. Based on the excellent electrochemical performance, Li 3 V 1.9 Cr 0.1 (PO 4 ) 3 /C will be a promising cathode material for rechargeable lithium-ion batteries.