Lithium plating-free 1 Ah-level high-voltage lithium-ion pouch battery via ambi-functional pentaerythritol disulfate
- Authors
- Vu, Dung Tien Tuan; Im, Jinsol; Kim, Jae-Hee; Han, Jisoo; Chung, Gyeong Jun; Nguyen, Giang Thi Huong; Seo, Junhyeok; Kim, Minjae; Hwang, Eui-Hyung; Kwon, Young-Gil; Shin, Jae Wook; Cho, Kuk Young
- Issue Date
- Aug-2023
- Publisher
- Elsevier BV
- Keywords
- Lithium-ion pouch cell; Lithium plating-free; High-voltage; Ambi-functional additive; SEI layer
- Citation
- Journal of Energy Chemistry, v.83, pp 229 - 238
- Pages
- 10
- Indexed
- SCIE
SCOPUS
- Journal Title
- Journal of Energy Chemistry
- Volume
- 83
- Start Page
- 229
- End Page
- 238
- URI
- https://scholarworks.bwise.kr/erica/handle/2021.sw.erica/113164
- DOI
- 10.1016/j.jechem.2023.04.012
- ISSN
- 2095-4956
- Abstract
- Elevating the charge cut-off voltage beyond traditional 4.2 V is a commonly accepted technology to increase the energy density of Li-ion batteries (LIBs) but the risk of Li-dendrites and fire hazard increases as well. The use of ambi-functional additive, which forms stable solid electrolyte interphase (SEI) simultaneously at both cathode and anode, is a key to enabling a dendrites-free and well-working high-voltage LIB. Herein, a novel ambi-functional additive, pentaerythritol disulfate (PEDS), at 1 wt% without any other additive is demonstrated. We show the feasibility and high impacts of PEDS in forming lithium sulfate-incorporated robust SEI layers at NCM523 cathode and graphite anode in 1 Ah-level pouch cell under 4.4 V, 25 °C and 0.1 C rate, which mitigates the high-voltage instability, metal-dissolution and cracks on NCM523 particles, and prevents Li-dendrites at graphite anode. Improved capacity retention of 83% after 300 cycles is thereby achieved, with respect to 69% with base electrolyte, offering a promising path toward the design of practical high-energy LIBs.
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