High performance Li2MnSiO4 prepared in molten KCl-NaCl for rechargeable lithium ion batteries

被引：28

作者：

Wang, Fei ^{[1
]}

Wang, Yanming ^{[1
]}

Sun, Dengming ^{[1
]}

Wang, Lei ^{[1
]}

Yang, Jun ^{[2
]}

Jia, Haiping ^{[3
]}

机构：

[1] Huaibei Normal Univ, Sch Chem & Mat Sci, Huaibei 235000, Anhui, Peoples R China

[2] Shanghai Jiao Tong Univ, Sch Chem & Chem Engn, Shanghai 200240, Peoples R China

[3] Univ Munster, Meet Battery Res Ctr, Inst Phys Chem, D-48149 Munster, Germany

来源：

ELECTROCHIMICA ACTA | 2014年 / 119卷

关键词：

Lithium ion battery; Molten salt method; Lithium manganese silicate; Cyclability; CATHODE MATERIAL; HIGH-CAPACITY; ELECTROCHEMICAL PERFORMANCE; SALT SYNTHESIS; FLUX METHOD; LI2MSIO4; M; NANOCOMPOSITE; CARBON; SPINEL; MN;

D O I：

10.1016/j.electacta.2013.12.057

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Li2MnSiO4/C composites have been prepared by a facile molten salt method followed by a carbon coating process. Submicron Li2MnSiO4 particles are obtained in KCl-NaCl molten phase with a short reaction time of 3 h. The orthorhombic structure and sphere-like morphology are confirmed by X-ray diffraction and scanning electron microscope. Ex-situ XRD study confirms amorphous transition of Li2MnSiO4 during the first charge process. Galvanostatic charge-discharge tests display high initial charge and discharge capacities of 265 and 194 mAh g(-1), respectively, at 0.05 C rate for the Li2MnSiO4/C composite prepared at 700 degrees C. At 0.1 C rate, it maintains a discharge capacity of 165 mAh g(-1) and its capacity retention at the 50th cycle is up to 78%, showing superior cycling stability. (C) 2013 Elsevier Ltd. All rights reserved.

引用

页码：131 / 137

页数：7

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