Details

Autor(en) / Beteiligte

• Zhang, Li
• Hu, Lei
• Fei, Linfeng
• Qi, Jianquan
• Hu, Yongming
• Wang, Yu
• Gu, Haoshuang

Titel

Large-scale synthesis of Li 3 V 2 (PO 4 ) 3 @C composites by a modified carbothermal reduction method as cathode material for lithium-ion batteries

Ist Teil von

• RSC advances, 2017, Vol.7 (41), p.25422-25428

Erscheinungsjahr

2017

Link zum Volltext

Quelle

EZB Electronic Journals Library

Beschreibungen/Notizen

• Carbon coated Li 3 V 2 (PO 4 ) 3 composites were prepared by a modified carbothermal reduction method. The method has the advantages of being simple and scalable, while the whole synthesis is devoid of any reducing/protecting gases, therefore, it can be directly carried out in muffle furnace. The obtained Li 3 V 2 (PO 4 ) 3 @C composites have particles sizes from 500 nm to 3 μm, and with homogeneous carbon coating layer thickness of about 7 nm. The battery based on this Li 3 V 2 (PO 4 ) 3 @C composites cathode exhibits a specific discharge capacity of 130.9 mA h g −1 at 0.1 C, and exhibits an initial specific discharge capacity of 102.8 mA h g −1 even at 10 C and almost keeps 96.6% of initial capacity retention after 500 cycles. The performance enhancement can be directly ascribed to the robust structure merits of the Li 3 V 2 (PO 4 ) 3 @C composites synthesized by the modified carbothermal reduction method. Furthermore, the as-developed method has the potential to be expanded to other lithium transition-metal phosphates (such as lithium iron phosphate), which conventionally need to be sintered in reductive or protective atmospheres.