Hebei Provincial Laboratory of Dielectric and Electrolyte Materials

Qinhuangdao, China

Hebei Provincial Laboratory of Dielectric and Electrolyte Materials

Qinhuangdao, China
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Chang L.,Northeastern University China | Chang L.,Hebei Provincial Laboratory of Dielectric and Electrolyte Materials | Luo S.,Northeastern University China | Luo S.,Hebei Provincial Laboratory of Dielectric and Electrolyte Materials | And 6 more authors.
Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering | Year: 2014

The high voltage cathode material, LiMnPO4, has gained a lot of attention, because of its properties of non-toxicity, high voltage, excellent cycle performance and security. But the shortages of this material limit its application, such as the bad electronic conductivity, intrinsic conductivity and rate capability. In recent years, the electrochemical performance of LiMnPO4 has been improved significantly by increasing the electronic conductivity between the particles, the intrinsic conductivity of particles and decreasing the size of particles. In this paper, we mainly introduced the structure and properties of LiMnPO4 and the methods of synthesizing and improving LiMnPO4 material, including high temperature solid-phase, sol-gel, hydrothermal method and spray drying, surface coating, doping and nano-structure synthesis. We also concluded the current situation and the problems of the research of LiMnPO4 material and gave some comments of the main research direction.


Chang L.,Northeastern University China | Chang L.,Hebei Provincial Laboratory of Dielectric and Electrolyte Materials | Luo S.,Northeastern University China | Luo S.,Hebei Provincial Laboratory of Dielectric and Electrolyte Materials | And 13 more authors.
Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering | Year: 2015

Li4Ti5O12 samples were synthesized via a PVP (polyvinylpyrrolidone) assisted gel-combustion method by varying the calcination temperature. The effect of different roasting temperatures on the structure, the morphology, and the electrochemical performance of the Li4Ti5O12 material was analyzed. The cycle performance, the structure and the morphology of the prepared material were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and charge/discharge test system. The results show that the Li4Ti5O12 powder has a single-phase spinel structure with uniform particles size. The average particle size is 500 nm. The Li4Ti5O12 material synthesized at 800℃ for 8 h possesses excellent performance, and its first discharge capacity is 167.4 mAh/g. Copyright © 2015, Northwest Institute for Nonferrous Metal Research. Published by Elsevier BV. All rights reserved.

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