| Presentation | 2022-03-26 Study on Li Pre-doping Technology to Si Electrode using Li-naphthalenide Solutions Yusuke Himata, Hikaru Enomoto, Shunya Ishii, Mika Fukunishi, Tatsuo Horiba, Morihiro Saito, |
|---|---|
| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | In recent years, next-generation batteries such as Li-S and Li-O2 systems have been strongly demanded for the power source of electric vehicles (EVs). These systems possess excellent potentials for higher energy densities beyond the conventional Li-ion batteries. Li metal was basically used as the negative electrode (NE) because of not only the achievement of high energy density but also non-containing of Li in the positive electrodes. However, this causes to the risk of short-circuit by Li dendrite growth during charge/discharge cycling. On the contrary, Si is a good alternative to Li metal NE because of the high theoretical energy capacity (3580 mAh g-1) and difficulty of Li dendrite growth. To apply the Si NEs to next-generation batteries, it is necessary to Li pre-dope, i.e. Li-Si alloying, in advance to practical use. We have also studied a solution-type pre-doping (SP) method by using Li-naphthalenide (Li-NTL) solutions with different solvents and found that 2-methyltetrahydrofulan (MeTHF) solvent exhibited an excellent homogeneity and depth of Li-Si alloying owing the lowest equilibrium potential relating the solution structure. In this study, we tried to change the solvation structure for the accompanying lower equilibrium potential by increasing the Li concentration. Also, the role of Li foil in the pre-doping cell and the Li pre-doping mechanism by the SP method for Si electrode was also discussed. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Si Negative Electrode / Li-Naphthalenide Solution / Li Pre-doping / Li Concentration / Reaction Mechanism |
| Paper # | OME2021-70 |
| Date of Issue | 2022-03-19 (OME) |
| Conference Information | |
| Committee | OME |
|---|---|
| Conference Date | 2022/3/26(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Seikei Univ, |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | battery, electrochemistry, surface modification, catalyst, in situ observation, capacitor |
| Chair | Toshiki Yamada(NICT) |
| Vice Chair | Eiji Itoh(Shinshu Univ.) |
| Secretary | Eiji Itoh(Osaka Univ.) |
| Assistant | Yoshiyuki Seike(Aichi Inst. of Tech.) / Akira Baba(Niigata Univ.) |
| Paper Information | |
| Registration To | Technical Committee on Organic Molecular Electronics |
|---|---|
| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Study on Li Pre-doping Technology to Si Electrode using Li-naphthalenide Solutions |
| Sub Title (in English) | |
| Keyword(1) | Si Negative Electrode |
| Keyword(2) | Li-Naphthalenide Solution |
| Keyword(3) | Li Pre-doping |
| Keyword(4) | Li Concentration |
| Keyword(5) | Reaction Mechanism |
| 1st Author's Name | Yusuke Himata |
| 1st Author's Affiliation | Seikei University(Seikei Univ.) |
| 2nd Author's Name | Hikaru Enomoto |
| 2nd Author's Affiliation | Seikei University(Seikei Univ.) |
| 3rd Author's Name | Shunya Ishii |
| 3rd Author's Affiliation | Seikei University(Seikei Univ.) |
| 4th Author's Name | Mika Fukunishi |
| 4th Author's Affiliation | Seikei University(Seikei Univ.) |
| 5th Author's Name | Tatsuo Horiba |
| 5th Author's Affiliation | Seikei University(Seikei Univ.) |
| 6th Author's Name | Morihiro Saito |
| 6th Author's Affiliation | Seikei University(Seikei Univ.) |
| Date | 2022-03-26 |
| Paper # | OME2021-70 |
| Volume (vol) | vol.121 |
| Number (no) | OME-441 |
| Page | pp.pp.17-22(OME), |
| #Pages | 6 |
| Date of Issue | 2022-03-19 (OME) |