Electrical and electrochemical properties of glass-ceramic electrolytes in the systems Li2S-P2S5-P2S3 and Li2S-P2S5-P2O5
Electrical and electrochemical properties of glass-ceramic electrolytes in the systems Li2S-P2S5-P2S3 and Li2S-P2S5-P2O5
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DOI：
10.1016/j.ssi.2010.06.018
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发表时间：
2011-06-16
影响因子：
3.2
通讯作者：
Tatsumisago, Masahiro
中科院分区：
文献类型：
--
作者：
Minami, Keiichi;Hayashi, Akitoshi;Tatsumisago, Masahiro
研究了采用机械球磨法制备的70 Li（2）S中心点（30 - x）P2 S5中心点xP（2）S（3）和70 Li（2）S中心点（30 - x）P2 S5中心点xP（2）O（5）（mol%）微晶玻璃的电学和电化学性能。当P2 S3和P2 O 5的摩尔分数分别为1%和3%时，微晶玻璃的电导率最高，分别为5.4 x 10（-3）S cm（-1）和4.6 x 10（-3）S cm（-1）。此外，这些玻璃陶瓷比70 Li（2）S中心点30 P（2）S（5）（摩尔%）玻璃陶瓷表现出更高的电化学稳定性。根据所得玻璃陶瓷的XRD图案，三价磷和氧掺入到Li 7 P3 S11晶体中。因此，我们推测，通过将三价磷和氧引入到Li 7 P3 S11晶体中而形成的Li 7 P3 S11类似晶体改善了玻璃陶瓷的电学和电化学性质。使用70 Li（2）S中心点29 P（2）S（5）中心点1 P（2）S（3）（摩尔%）玻璃陶瓷作为固体电解质的全固态电池在12.7mA cm（-2）的高电流密度下在100 ℃的高温下工作。该电池显示出超过700次循环而没有容量损失的优异循环能力。(C)2010 Elsevier B. V.保留所有权利。
Electrical and electrochemical properties of the 70Li(2)S center dot(30 - x)P2S5 center dot xP(2)S(3) and the 70Li(2)S center dot(30 - x) P2S5 center dot xP(2)O(5) (mol%) glass-ceramics prepared by the mechanical milling technique were investigated. Glass-ceramics with 1 mol% P2S3 and 3 mol% P2O5 showed the highest conductivity of 5.4 x 10(-3) S cm(-1) and 4.6 x 10(-3) S cm(-1), respectively. Moreover, these glass-ceramics showed higher electrochemical stability than the 70Li(2)S center dot 30P(2)S(5) (mol%) glass-ceramic. From the XRD patterns of the obtained glass-ceramics, trivalent phosphorus and oxygen were incorporated into the Li7P3S11 crystal. We therefore presume that the Li7P3S11 analogous crystals, which were formed by incorporating trivalent phosphorus and oxygen into the Li7P3S11 crystal, improve the electrical and electrochemical properties of the glass-ceramics. An all-solid-state cell using the 70Li(2)S center dot 29P(2)S(5)center dot 1P(2)S(3) (mol%) glass-ceramic as solid electrolyte operated under the high current density of 12.7 mA cm(-2) at the high temperature of 100 degrees C. The cell showed an excellent cyclability of over 700 cycles without capacity loss. (C) 2010 Elsevier B.V. All rights reserved.