𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Synthesis and characterization of LiFePO4/(Ag + C) composite cathodes with nano-carbon webs

✍ Scribed by C.H. Mi; Y.X. Cao; X.G. Zhang; X.B. Zhao; H.L. Li

Publisher
Elsevier Science
Year
2008
Tongue
English
Weight
864 KB
Volume
181
Category
Article
ISSN
0032-5910

No coin nor oath required. For personal study only.

✦ Synopsis

LiFePO 4 /(Ag + C) composite cathodes with a new type of nano-sized carbon webs were synthesized by two methods of an aqueous coprecipitation and a sol-gel process, respectively. Simultaneous thermogravimetric-differential thermal analysis indicates that the crystallization temperature of LiFePO 4 is about 455-466 Β°C, which is close to the pyrolysis temperature of polypropylene, 460 Β°C. The silver and carbon comodifying does not affect the olivine structure of LiFePO 4 but improves its kinetics in terms of discharge capacity and rate capability. Discharge capacities were improved from 153.4 mA h g -1 of LiFePO 4 /C to 160.5 mA h g -1 and 162.1 mA h g -1 for LiFePO 4 /(Ag + C) cathodes synthesized by the co-precipitation and sol-gel methods, respectively. The possible reasons for the small difference in discharge capacity of two LiFePO 4 /(Ag + C) cathodes were discussed. AC impedance measurements show that the Ag + C co-modification decreases the charge transfer resistance of LiFePO 4 / (Ag + C) cathodes.

πŸ“œ SIMILAR VOLUMES

Synthesis and characterization of LiFe0.
Synthesis and characterization of LiFe0.9Mg0.1PO4/nano-carbon webs composite cathode
✍ Hui Liu; Jingying Xie πŸ“‚ Article πŸ“… 2009 πŸ› Elsevier Science 🌐 English βš– 761 KB

LiFe 0.9 Mg 0.1 PO 4 /nano-carbon webs composite cathode material was synthesized from nanocrystalline Fe 3 O 4 through sol-gel process, followed by carbothermal reduction reaction in the presence of LiOHβ€’H 2 O and NH 4 H 2 PO 4 . Sucrose molecule was introduced through liquid phase and used to cons

In situ synthesis, structural characteri
In situ synthesis, structural characterization and luminescent property of a novel hybrid solid with twofold interpenetrating (4,6)-connected topology [{(Cu4I4)2H2O}{Cu6(mtz)6}]n (Hmtz = 3,5-dimethyl-1,2,4-triazole)
✍ Yunlong Fu; Hui Lu πŸ“‚ Article πŸ“… 2008 πŸ› Elsevier Science 🌐 English βš– 382 KB

A novel three-dimensional hybrid solid, [{(Cu 4 I 4 ) 2 H 2 O}{Cu 6 (mtz) 6 }] n (1) (Hmtz = 3,5-dimethyl-1,2,4-triazole), was synthesized under solvothermal condition. The structure of 1 consists of four-connected Cu 4 I 4 clusters and hexanuclear Cu 6 (mtz) 6 rings as secondary building units (SBU