Preparation and characterization of SnO-P2O5 glasses as anode materials for lithium secondary batteries
Preparation and characterization of SnO-P2O5 glasses as anode materials for lithium secondary batteries
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DOI：
10.1016/j.jnoncrysol.2004.08.069
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发表时间：
2004-10-15
影响因子：
3.5
通讯作者：
Tatsumisago, M
中科院分区：
文献类型：
--
作者：
Hayashi, A;Konishi, T;Tatsumisago, M
研究了用熔融淬冷法制备的SnO-P2 O 5玻璃的结构、热性能和电化学性能。玻璃显示出约250 ℃的相对低的玻璃化转变温度，并且这些值低于SnO-B2 O3和SnO-BPO 4玻璃的玻璃化转变温度。局部结构的玻璃进行了研究，通过拉曼和P-31 MAS-NMR测量，表明桥氧的数量减少，而非桥氧浓度增加，增加SnO含量的玻璃。以常规液体电解质为电解质，考察了该玻璃作为锂二次电池负极材料的电化学性能。使用67 SnO·33 P（2）O（5）（摩尔%）玻璃作为工作电极的电池表现出优异的循环性能，并且在0-0.8 V的截止电压下保持超过400 mA h g（-1）的高充放电容量20次循环。
The glass structure, thermal and electrochemical properties of the SnO-P2O5 glasses, prepared by melt-quenching technique, were examined. The glasses showed relatively low glass transition temperatures of about 250degreesC and these values were lower than those of the SnO-B2O3 and SnO-BPO4 glasses. Local structure of the glasses was investigated by Raman and P-31 MAS-NMR measurements, suggesting that the number of bridging oxygens decreased whereas the non-bridging oxygen concentration increased with increasing SnO content in the glasses. The electrochemical properties of the glasses as anode materials for lithium secondary batteries were examined using the cells with conventional liquid electrolytes. The cell using the 67SnO.33P(2)O(5) (mol%) glass as a working electrode exhibited an excellent cycling performance and retained high charge-discharge capacities over 400 mA h g(-1) for 20 cycles under a cut-off voltage of 0-0.8 V. (C) 2004 Published by Elsevier B.V.