材料期刊网

Synthesis and Electrochemical Properties of Carbon-Mixed LiEr0.02Fe0.98PO4 Cathode Material for Lithium-ion Batteries

材料科学技术（英文）

关键词: 电化学性能 , 正极材料 , 锂离子电池 , 合成 , 碳源 , LiFePO4 , 扫描电子显微镜 , 混合

Synthesis and Electrochemical Properties of Carbon-Mixed LiEr_0.02Fe_0.98PO₄ Cathode Material for Lithium-ion Batteries

Huseyin Goktepe

材料科学技术（英文）

LiEr_0.02Fe_0.98PO₄/C composite cathode was synthesized by a simple solution method with polyethylene glycol (PEG) as the reductive agent and carbon source. The effect of erbium doping on the electrochemical behavior of LiFePO₄ was studied in this paper. The samples were characterized by X-ray powder diffraction and scanning electron microscopy and the electrochemical properties were investigated by the charge-discharge test. An initial discharge capacity of 149 mAh?g^-1 was achieved for the LiEr_0.02Fe_0.98PO₄/C composite cathode with a rate of 0.1 C. The electronic conductivity of Er doped LiFePO₄/C was measured as 10^-2 S?cm^-1. The results indicated that erbium doping did not destroy the lattice structure of LiFePO₄ and enlarge the lattice volume. These changes are beneficial to the improvement of the electrochemical performance of the LiFePO₄ cathode.

关键词: LiFePO₄

Synthesis and Electrochemical Properties of Carbon-Mixed LiEr_0.02Fe_0.98PO₄ Cathode Material for Lithium-ion Batteries

Huseyin Goktepe

材料科学技术（英文）

LiEr_0.02Fe_0.98PO₄/C composite cathode was synthesized by a simple solution method with polyethylene glycol (PEG) as the reductive agent and carbon source. The effect of erbium doping on the electrochemical behavior of LiFePO₄ was studied in this paper. The samples were characterized by X-ray powder diffraction and scanning electron microscopy and the electrochemical properties were investigated by the charge-discharge test. An initial discharge capacity of 149 mAh?g^-1 was achieved for the LiEr_0.02Fe_0.98PO₄/C composite cathode with a rate of 0.1 C. The electronic conductivity of Er doped LiFePO₄/C was measured as 10^-2 S?cm^-1. The results indicated that erbium doping did not destroy the lattice structure of LiFePO₄ and enlarge the lattice volume. These changes are beneficial to the improvement of the electrochemical performance of the LiFePO₄ cathode.

关键词: LiFePO₄

Performance of Sn-Cu Alloy Anode at Low Temperature

Jianguo REN , Weihua PU , Xiangming HE , Chunrong WAN , Changyin JIANG

材料科学技术（英文）

Sn-Cu alloy anode was prepared by pulsed electrodeposition for lithium ion batteries, and its electrochemical performance was tested at low temperature. When temperature decreased from 25℃ to -20℃, the Sn-Cu alloy anode provided the capacity retentions of 76% in the electrolyte of 1 mol/L LiBF4/EC+EMC+γBL and 51% in the electrolyte of 1 mol/L LiPF6/EC+DMC+DEC. Under the same conditions, the graphite anode presented the capacity retentions of only 41% and 18%, respectively. The Sn-Cu alloy anode showed better performance in the electrolyte of 1 mol/L LiBF4/EC+EMC+γBL than in the electrolyte of 1 mol/L LiPF$_{6}$/EC+DMC+DEC, and kept much higher capacity retention than that of graphite at -20℃. The Sn-Cu alloy anode in the electrolyte of 1~mol/L LiBF4/EC+EMC+γBL (1:1:1, volume ratio) is promising for low temperature application of lithium batteries.

关键词: Sn-Cu alloy electrode , null , null , null