最近受理された原著論文

Development of polycarbonate-based electrolytes with in situ polymerized electrolyte interlayers for lithium-metal batteries

Journal of Energy Storage (accepted 15 Dec. 2023)
Zhenxing Cui, Jusef Hassoun, Yoichi Tominaga

In this study, an innovative approach is introduced to address these challenges by incorporating an in situ polymerized poly(vinyl ethylene carbonate) (PVEC) electrolyte interlayer between poly(ethylene carbonate) (PEC)-based SPE and electrode material. Furthermore, lithium nitrate (LiNO3) is incorporated as an additive in the PEC-based SPE to facilitate the formation of a stable and suitable solid electrolyte interphase (SEI) layer, thereby enhancing the cycling stability of LMBs.

Ion-Conductive and Mechanically Stable Copolymer Electrolytes Based on Aliphatic Carbonates

Macromolecules (accepted 17 Oct. 2023)
Shuto Ishii, Naomi Nishimura, Yoichi Tominaga

A polycarbonate-based copolymer was developed by copolymerization with poly(decamethylene carbonate) [P(DMC)], pentaerythritol, triethylene glycol (TEG), 3,9-bis(1,1-dimethyl-2-hydroxyethyl)-2,4,8,10-tetraoxaspiro[5.5]undecane (spiroglycol, SPG) and was evaluated as an SPE. By comparing SPEs containing 60 wt % LiTFSI, we find that the copolymerization of SPG significantly improves the mechanical stability of SPE. branch-P(DMC/TEG/SPG) that has been copolymerized with all monomers displayed the best ionic conductivity at room temperature, a value of 7.4 × 10–6 S cm–1 at 30 oC.

A single Mg ion-conductive polymer-coated MgCo2O4 for Mg rechargeable battery

Chemistry Letters (accepted 7 Jan. 2023)
Naomi Nishimura, Kazumasa Masaki, Kei Nishikawa, Yasushi Idemoto, Yoichi Tominaga

A method in coating cathode active material for magnesium-ion battery was proposed using polymer, a poly(styrene-4-sulfonyl trifluoromethane sulfonyl)imide Mg salt (PSTFSI-Mg) having trifluoromethane sulfonyl imide side group. A cathode active material, MgCo2O4 (MCO), was used and spray-dried with PSTFSI-Mg. After preparing the cathode, the Mg battery test was performed with glyme electrolyte solution. The polymer-coated MCO cathode-based coin cell showed good cyclability with moderate discharge capacity around 45 mAh g−1 , and this indicates that the polymer thin layer on the MCO surface probably acts as artificial solid electrolyte interface and prevents electrolyte decomposition.