Preparation and Characterization of SnO-Based Glasses as Anode Materials for Lithium Secondary Batteries
Preparation and Characterization of SnO-Based Glasses as Anode Materials for Lithium Secondary Batteries
复制标题
锂二次电池负极材料SnO基玻璃的制备及表征
DOI：
10.2109/jcersj.109.1276_1010
复制
发表时间：
2001
影响因子：
1.1
通讯作者：
T. Minami
中科院分区：
文献类型：
--
作者：
M. Nakai;A. Hayashi;H. Morimoto;M. Tatsumisago;T. Minami
采用熔融淬火法制备了Li2O-SnO-B2O3和Li2O-SnO-BPO4体系的玻璃，并研究了它们的热性能、粘性和电化学性能。 SnO 基玻璃具有约 350°C 的相对较低的玻璃化转变温度 (Tg) 和出色的抗结晶热稳定性。 Tg 和 En/Tg 的值（其中 En 是 Tg 附近粘性流的活化能，En/Tg 是脆性参数）在 SnO-B2O3 系统中的 40mol% SnO 组成附近达到最大。通过使用简单的三电极电池来研究这些玻璃的电化学性能，其中玻璃作为工作电极，锂片作为对电极和参比电极，1M LiPF6/EC+DEC 作为液体电解质。 SnO基玻璃作为负极材料，首次循环放电容量超过650mAh·g-1，并表现出良好的循环性能。
Glasses in the systems of Li2O-SnO-B2O3 and Li2O-SnO-BPO4 were prepared by a melt quenching method and their thermal, viscous, and electrochemical properties were investigated. The SnO based glasses exhibited the relatively low glass transition temperatures (Tg) of ≈350°C and an excellent thermal stability against crystallization. The values of Tg and Eη/Tg, where Eηis the activation energy for viscous flow at around Tg and Eη/Tg is the fragility parameter, were maximized at around a composition of 40mol% SnO in the SnO-B2O3 system. The electrochemical properties of those glasses were investigated by using a simple three-electrode cell with the glass as a working electrode, lithium sheets as both counter and reference electrodes, and 1M LiPF6/EC+DEC as a liquid electrolyte. The SnO based glasses worked as anode materials with high discharge capacities over 650mAh·g-1 at the first cycle and exhibited good cycling performance.