All-solid-state lithium secondary batteries with metal-sulfide-coated LiCoO2 prepared by thermal decomposition of dithiocarbamato complexes

• DOI: 10.1039/c2jm32490c
• Publication Date: 2012-06-22T18:41:12Z
• Authors: Atsushi Sakuda; Naoyuki Nakamoto; Hirokazu Kitaura; Akitoshi Hayashi; Kiyoharu Tadanaga; Masahiro Tatsumisago
• Keywords: Cobalt sulfide; Lithium battery

LiCoO2 particles were coated with cobalt and nickel sulfides by thermal decomposition of their respective diethyldithiocarbamato complexes. All-solid-state lithium secondary batteries fabricated using the positive electrode a Li2S–P2S5 solid electrolyte. The coatings reduced interfacial resistance between electrolyte all-solid-state after first charge, resulting in an improved cell performance. NiS-coated was charged discharged at high rate 10 C. deterioration interface electrolyte, indicating that they function as effective buffer layer interface.