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All‐Solid‐State Lithium‐Sulfur Batteries Using Sulfurized Alcohol Composite Material with Improved Coulomb Efficiency
Author(s) -
Takeuchi Tomonari,
Kojima Toshikatsu,
Kageyama Hiroyuki,
Kobayashi Hironori,
Mitsuhara Kei,
Nakanishi Koji,
Ohta Toshiaki
Publication year - 2019
Publication title -
energy technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.91
H-Index - 44
eISSN - 2194-4296
pISSN - 2194-4288
DOI - 10.1002/ente.201900509
Subject(s) - organosulfur compounds , materials science , sulfur , composite number , lithium (medication) , electrolyte , solid state , chemical engineering , absorption (acoustics) , cathode , composite material , chemistry , metallurgy , electrode , medicine , engineering , endocrinology
Sulfurized alcohol composite (SAC), a new type of organosulfur material, is applied to an all‐solid‐state cell with a sulfur‐based solid electrolyte (SE), Li 3 PS 4 . The cell shows high specific capacity (600–800 mAh g −1 ), and the initial coulomb efficiency is improved by mechanically milling the cathode layer (SAC + SE). The improvement is attributed to the partial lithiation of the SAC sample by milling with SE, which is confirmed by S K‐edge X‐ray absorption fine structure measurements. Such prelithiation is advantageous for fabricating high‐energy‐density all‐solid‐state cells.