TY - JOUR
T1 - Hexafluorophosphate-Bis(trifluoromethanesulfonyl)imide anion co-intercalation for increased performance of dual-carbon battery using mixed salt electrolyte
AU - Madrid Madrid, Jose C.
AU - Nakamura, Kotaro
AU - Inda, Keisuke
AU - Haneke, Lukas
AU - Heckmann, Andreas
AU - Frerichs, Joop Enno
AU - Hansen, Michael Ryan
AU - Placke, Tobias
AU - Winter, Martin
AU - Watanabe, Motonori
AU - Takagaki, Atsushi
AU - Akbay, Taner
AU - Ishihara, Tatsumi
N1 - Funding Information:
TI and TA are grateful for the support of the New Energy and Industrial Technology Development Organization (NEDO) Japan. The support of the International Institute for Carbon Neutral Energy Research (WPI?I2CNER) sponsored by MEXT is also acknowledged. The support by the Federal Ministry of Education and Research of Germany (BMBF) for funding of this work within the project ?Dual-Carb? (03XP0118) is gratefully acknowledged. The support under the International Fellowship for Outstanding Researchers Programme (T?B?TAK 2232) of the Scientific and Technological Research Council of Turkey is also acknowledged.
Funding Information:
TI and TA are grateful for the support of the New Energy and Industrial Technology Development Organization (NEDO) Japan . The support of the International Institute for Carbon Neutral Energy Research (WPI−I 2 CNER) sponsored by MEXT is also acknowledged. The support by the Federal Ministry of Education and Research of Germany ( BMBF ) for funding of this work within the project “Dual-Carb” (03XP0118) is gratefully acknowledged. The support under the International Fellowship for Outstanding Researchers Programme ( TÜBİTAK 2232 ) of the Scientific and Technological Research Council of Turkey is also acknowledged.
Publisher Copyright:
© 2020 Elsevier B.V.
PY - 2020/12/15
Y1 - 2020/12/15
N2 - Co-intercalation of Hexafluorophosphate(PF6ˉ) and Bis(trifluoromethane sulfonyl)imide (TFSIˉ) anions as a result of the use of a mixed salt of LiPF6 and LiTFSI is studied for the increased performance of a dual-carbon battery (DCB). Unlike the fluorine- or the imide-based anions (e.g., PF6ˉ and TFSIˉ), the cluster formation between co-intercalated PF6ˉ and TFSIˉ in the positive electrode of a DCB results in achieving high discharge capacities with significantly increased cycle properties. A reversible discharge capacity of 85 mAh/g-cathode over 350 cycles with no significant degradation is presented. The Coulombic efficiency of almost 100% is reached after the initial 10 cycles and suitable rate property is also observed. F NMR analysis on graphitic carbon intercalated with PF6ˉ and TFSIˉ suggests the interaction between two anions and ratio of intercalated PF6− and TFSI− was changed by applied voltage, resulting in the increased stability of the intercalated structure which is also supported by the first principles calculations.
AB - Co-intercalation of Hexafluorophosphate(PF6ˉ) and Bis(trifluoromethane sulfonyl)imide (TFSIˉ) anions as a result of the use of a mixed salt of LiPF6 and LiTFSI is studied for the increased performance of a dual-carbon battery (DCB). Unlike the fluorine- or the imide-based anions (e.g., PF6ˉ and TFSIˉ), the cluster formation between co-intercalated PF6ˉ and TFSIˉ in the positive electrode of a DCB results in achieving high discharge capacities with significantly increased cycle properties. A reversible discharge capacity of 85 mAh/g-cathode over 350 cycles with no significant degradation is presented. The Coulombic efficiency of almost 100% is reached after the initial 10 cycles and suitable rate property is also observed. F NMR analysis on graphitic carbon intercalated with PF6ˉ and TFSIˉ suggests the interaction between two anions and ratio of intercalated PF6− and TFSI− was changed by applied voltage, resulting in the increased stability of the intercalated structure which is also supported by the first principles calculations.
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U2 - 10.1016/j.jpowsour.2020.229084
DO - 10.1016/j.jpowsour.2020.229084
M3 - Article
AN - SCOPUS:85094193217
VL - 479
JO - Journal of Power Sources
JF - Journal of Power Sources
SN - 0378-7753
M1 - 229084
ER -
