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- Title
Li<sub>3</sub>PO<sub>4</sub>‐Enriched SEI on Graphite Anode Boosts Li<sup>+</sup> De‐Solvation Enabling Fast‐Charging and Low‐Temperature Lithium‐Ion Batteries.
- Authors
Wang, Chaonan; Xie, Yuansen; Huang, Yingshan; Zhou, Shaoyun; Xie, Huanyu; Jin, Hongchang; Ji, Hengxing
- Abstract
Li+ de‐solvation at solid‐electrolyte interphase (SEI)‐electrolyte interface stands as a pivotal step that imposes limitations on the fast‐charging capability and low‐temperature performance of lithium‐ion batteries (LIBs). Unraveling the contributions of key constituents in the SEI that facilitate Li+ de‐solvation and deciphering their mechanisms, as a design principle for the interfacial structure of anode materials, is still a challenge. Herein, we conducted a systematic exploration of the influence exerted by various inorganic components (Li2CO3, LiF, Li3PO4) found in the SEI on their role in promoting the Li+ de‐solvation. The findings highlight that Li3PO4‐enriched SEI effectively reduces the de‐solvation energy due to its ability to attenuate the Li+‐solvent interaction, thereby expediting the de‐solvation process. Building on this, we engineer Li3PO4 interphase on graphite (LPO−Gr) anode via a simple solid‐phase coating, facilitating the Li+ de‐solvation and building an inorganic‐rich SEI, resulting in accelerated Li+ transport crossing the electrode interfaces and interphases. Full cells using the LPO−Gr anode can replenish its 80 % capacity in 6.5 minutes, while still retaining 70 % of the room temperature capacity even at −20 °C. Our strategy establishes connection between the de‐solvation characteristics of the SEI components and the interfacial structure design of anode materials for high performance LIBs.
- Subjects
LITHIUM-ion batteries; GRAPHITE; ENGINEERS; ANODES; SOLID electrolytes
- Publication
Angewandte Chemie, 2024, Vol 136, Issue 21, p1
- ISSN
0044-8249
- Publication type
Article
- DOI
10.1002/ange.202402301