Effect of Nanophase Li₃PO₄ and Li₄P₂O on the Electrochemical Performance of LiFePO₄ Cathode Materials.

The Li3PO4 modified LiFePO4/C and Li4P2O7 modified LiFePO4/C cathode materials were synthesized by in-situ synthesis method, respectively. Phase compositions and microstructures of the products were characterized by X-ray powder diffraction (XRD), scanning electronic microscope (SEM). Results indicate that Li3PO4 and Li4P2O7 can sufficiently coat on the LiFePO4 surface and does not alter LiFePO4 crystal structure.

Effect of carbon source on the morphology and electrochemical performances of LiFePO4/C nanocomposites.

The carbon coated LiFePO4 (LiFePO4/C) nanocomposites materials were successfully synthesized by sol-gel method. The microstructure and morphology of LiFePO4/C nanocomposites were characterized by X-ray diffraction, Raman spectroscopy and scanning electron microscopy. The results showed that the carbon layers decomposed by different dispersant and carbon source had different graphitization degree, and the sugar could decompose to form more graphite-like structure carbon.

[A case control study on the treatment of unstable distal radius fractures with internal and external fixation].

Objective: To explore the clinical effects of diaplastic external fixator on the treatment of unstable fractures of distal radius.

Methods: A clinical data of 60 patients with unstable fractures of distal radius admitted to Wangjing Hospital from August 2005 to September 2009 were retrospectively analyzed with the paired design. According to the paired design, 60 patients were equally divided into two groups (internal fixation group and external fixation group), which were respectively treated with open reduction and steel plate internal fixation (internal fixation group) or closed reduction and external fixation (external fixation group), including 8 males and 52 females, with an average age of 60.

[Discussion of the mechanism of using continuous traction in treating unstable distal radius fracture].

Objective: To explore the mechanism of continuous traction in treating unstable distal radius fracture.

Methods: Thirty patients with unstable distal radius fractures were treated by diaplastic external fixator including 4 males and 26 females with an average age of 61 years ranging from 18 to 85 years. According to AO classification, 12 cases were type A3, 3 were type B2, 8 were type C1, 4 were type C2, 3 were type C3.