Details

Autor(en) / Beteiligte

• Jian, Zelang
• Han, Wenze
• Liang, Yanliang
• Lan, Yucheng
• Fang, Zheng
• Hu, Yong-Sheng
• Yao, Yan

Titel

Carbon-coated rhombohedral Li 3 V 2 (PO 4 ) 3 as both cathode and anode materials for lithium-ion batteries: electrochemical performance and lithium storage mechanism

Ist Teil von

• Journal of materials chemistry. A, Materials for energy and sustainability, 2014, Vol.2 (47), p.20231-20236

Erscheinungsjahr

2014

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• We report the electrochemical performance and storage mechanism of a symmetrical lithium-ion battery made of carbon-coated rhombohedral Li 3 V 2 (PO 4 ) 3 (r-LVP/C) as both the cathode and anode materials. The electrochemical evaluation of r-LVP/C in lithium half-cells demonstrates reversible lithium extraction/insertion reactions at 3.75 V and average 1.75 V vs. Li + /Li. Different storage mechanisms for the two reactions have been identified through ex situ and in situ X-ray diffraction measurements. A two-phase reaction takes place when two Li are extracted from r-LVP/C, while a solid-solution reaction occurs when two Li are inserted into r-LVP/C. In comparison, only one Na ion can be inserted into its sodium counterpart, Na 3 V 2 (PO 4 ) 3 . Symmetrical batteries presented a high capacity of 120 mA h g −1 with an operating voltage of ∼2.0 V.