Investigating the Interface of Li{N(SO<sub>2</sub>F)<sub>2</sub>}(NCCH<sub>2</sub>CH<sub>2</sub>CN)<sub>2</sub> Molecular Crystal Electrolytes for 5 V Class Solid-State Batteries
Molecular crystals composed of lithium bis(fluorosulfonyl)amide (LiFSA) and succinonitrile (SN), hereafter referred to as Li(FSA)(SN)<sub>2</sub>, are a promising solid electrolyte. To realize a wider application of molecular crystal solid electrolytes, it is critical to investigate the interface of Li(FSA)(SN)<sub>2</sub> and 5 V-class positive electrodes. Here, we studied the interface of Li(FSA)(SN)<sub>2</sub> with 5 V-class LiNi<sub>0.5</sub>Mn<sub>1.5</sub>O<sub>4</sub> (LNMO) positive electrodes utilizing modeled thin-film batteries. The Li(FSA)(SN)<sub>2</sub>|LNMO interfaces degrade, leading to an increase in interface resistance and capacity loss. By inserting an amorphous Li<sub>3</sub>PO<sub>4</sub> layer into the Li(FSA)(SN)<sub>2</sub>|LNMO interface, the low interface resistance remains, and no interphase layer is observed. The discharge capacity remains at 96% after 100 charge and discharge cycles. This study demonstrated the feasibility of operating Li(FSA)(SN)<sub>2</sub> in a 5 V-class solid-state battery revealing the potential of molecular crystal solid electrolytes in high-energy-density batteries.
Authors
- Ryota Shimizu (ORCID: https://orcid.org/0000-0001-9600-7255)
- Ruijie Zheng
- Mana Ogawa (ORCID: https://orcid.org/0000-0003-4269-9764)
- Kazunori Nishio (ORCID: https://orcid.org/0000-0002-8201-358X)
- Shigeru Kobayashi (ORCID: https://orcid.org/0000-0003-4997-8782)
- Yoshitaka Tateyama (ORCID: https://orcid.org/0000-0002-5532-6134)
- Ryo Nakayama (ORCID: https://orcid.org/0000-0001-6284-9884)
- Makoto Moriya (ORCID: https://orcid.org/0000-0001-9582-1263)
- Taro Hitosugi (ORCID: https://orcid.org/0000-0002-7795-0683)
- Yuki Watanabe (ORCID: https://orcid.org/0000-0003-2589-1105)
- Jun Deng (ORCID: https://orcid.org/0000-0002-1428-7992)
- H. Katsuragawa
Institutions
- Shizuoka University (JP)
- National Institute for Materials Science (JP)
- Shanghai Institute for Science of Science (CN)
- Life Science Institute (JP)
- Institute of Science Tokyo (JP)
- The University of Tokyo (JP)
Publication Details
- Journal
- ACS Applied Materials & Interfaces
- Published
- 2025-03-28
- DOI
- https://doi.org/10.1021/acsami.4c22076
- Citations
- 1
- Primary Topic
- Advancements in Battery Materials
- Type
- article
- Field-Weighted Citation Impact
- 0.73
Funders
- Ministry of Education, Culture, Sports, Science and Technology
- Japan Society for the Promotion of Science
- Core Research for Evolutional Science and Technology
- JST-Mirai Program