# Fileset

[version 7.7_SI.docx](https://mdr.nims.go.jp/filesets/f8221484-5d96-4450-b855-9ae5626afe8d/download)

## Creator

Yiyi Zheng, Tian Zhang, Pui-Kit Lee, Qiaohui Duan, Xin Li, [Shuyu Dong](https://orcid.org/0000-0002-6154-4533), Tian Tan, Yao Wang, [Denis Y.W. Yu](https://orcid.org/0000-0002-5883-7087)

## Rights

[Creative Commons BY-NC-ND Attribution-NonCommercial-NoDerivs 4.0 International](https://creativecommons.org/licenses/by-nc-nd/4.0/)

## Other metadata

[Boosting Li-ion transport for graphite electrodes with lithium bis(fluorosulfonyl)imide salt and methyl acetate additive for fast-charging Li-ion batteries](https://mdr.nims.go.jp/datasets/e21c6ba4-f9d3-4994-8aca-a7e55c5d924c)

## Fulltext

Boosting Li-ion transport for graphite electrodes with lithium bis(fluorosulfonyl)imide salt and methyl acetate additive for fast-charging Li-ion batteries Yiyi Zhenga,1, Tian Zhangb,1, Pui-Kit Leea, Qiaohui Duana, Xin Lic, Shuyu Donga, Tian Tana, Yao Wanga, Denis Y. W. Yua,d*a School of Energy and Environment, City University of Hong Kong, Tat Chee Ave, Kowloon, Hong Kong, China.b Department of Materials Science and Engineering and Center of Super-Diamond and Advanced Films, City University of Hong Kong, Tat Chee Ave, Kowloon, Hong Kong, China.c Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China.d Research Center for Energy and Environmental Materials (GREEN), National Institute for Materials Science, Tsukuba, Ibaraki 305-0044, Japan.*yu.denis@nims.go.jpFig. S1. First charge-discharge curves for graphite electrodes using different electrolyte at 0.1 C. Fig. S2. Cyclic voltammetry curves for graphite electrodes at a scan rate of 0.05 mV s-1. (a) Second scan; (b) third scan.Fig. S3. Charge and discharge curves of graphite electrodes using different electrolytes. (a) 1.0 M LiPF6 FEC/DEC; (b) 1.5 M LiPF6 FEC/DEC; (c) 1.5 M LiFSI FEC/DEC; (d) 1.5 M LiFSI FEC/DEC+2 wt% MA.Fig. S4. (a) Ionic conductivity of 1.5 M LiFSI FEC/DEC electrolytes with different amounts of MA. Nyquist plots of graphite electrodes after different cycles at 2 C discharge rate using 1.5 M LiFSI FEC/DEC electrolyte with (b) 1 wt% MA, (c) 2 wt% MA and (d) 5 wt% MA; (e) fitted value of RSEI from (b) to (d); (f) rate performance of graphite electrodes using LiFSI electrolyte with different MA amounts. Fig. S5. Nyquist plots of graphite half cells using different electrolytes after (a) 10 cycles and (b) 20 cycles at 2 C discharge rate; (c) fitted value of Rct of graphite half cells using different electrolytes after different cycles.Fig. S6. Comparison of the effect of salt type. (a) Rate performance and (b) corresponding charge-discharge curves of graphite electrodes in 1.0 M LiPF6 or 1.5 M LiFSI FEC/DEC electrolyte with 2 wt% MA; (c) ionic conductivity of 1.0 LiPF6 FEC/DEC electrolyte with or without MA.Fig. S7. SEM images of the cycled graphite electrodes using different electrolytes. (a) 1.0 M LiPF6 FEC/DEC (b) 1.5 M LiFSI FEC/DEC; (c) 1.5 M LiFSI FEC/DEC + 2 wt% MA. Fig. S8. F 1s XPS spectra of graphite electrodes in different electrolytes after 3 cycles.Fig. S9. HRTEM image of the graphite electrode using 1.0 M LiPF6 FEC/DEC after 3 cycles at 0.1 C.Fig. S10. (a) Rate performance and (b) its corresponding charge-discharge curves of graphite half cells first using 1.5 M LiFSI FEC/DEC as SEI forming electrolyte (cell 3 and 5).image5.tiffimage6.tiffimage7.tiffimage8.tiffimage9.tiffimage10.tiffimage1.tiffimage2.tiffimage3.tiffimage4.tiff