All-solid-state lithium secondary batteries with SnS-P2S5 negative electrodes and Li2S-P2S5 solid electrolytes

The 80SnS(center dot)20P(2)S(5) (mol%) amorphous material was prepared by a mechanical milling technique. The obtained material was fine powders with a few micrometers in size. All-solid-state cells with the SnS center dot P2S5 amorphous electrode and the Li2S center dot P2S5 glass-ceramic electrolyte, where a continuous P2S5 sulfide network between both the materials was formed, were fabricated. The cells exhibited high reversible capacity of over 400 mAh g(-1) for 50 cycles at room temperature. The addition of P2S5 as a glass former to SnS improved cell capacity and cyclability, suggesting that P2S5 network played an important role in enhancing the availability of SnS as an electrode material. (c) 2005 Elsevier B.V. All rights reserved.