Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 59, Issue 34, Pages 14473-14480Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202002411
Keywords
arenes; electrochemistry; lithiation; lithium-ion batteries; redox chemistry
Categories
Funding
- National Research Foundation of Korea [2E30370, 2E30201] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- Korea Institute of Science and Technology [2E30370, 2E30211, 2E30201, 2E30211, 2E30201] Funding Source: Medline
- National Research Foundation of Korea [2019M3E6A1064608, 2017M1A2A2044482] Funding Source: Medline
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Prelithiation is of great interest to Li-ion battery manufacturers as a strategy for compensating for the loss of active Li during initial cycling of a battery, which would otherwise degrade its available energy density. Solution-based chemical prelithiation using a reductive chemical promises unparalleled reaction homogeneity and simplicity. However, the chemicals applied so far cannot dope active Li in Si-based high-capacity anodes but merely form solid-electrolyte interphases, leading to only partial mitigation of the cycle irreversibility. Herein, we show that a molecularly engineered Li-arene complex with a sufficiently low redox potential drives active Li accommodation in Si-based anodes to provide an ideal Li content in a full cell. Fine control over the prelithiation degree and spatial uniformity of active Li throughout the electrodes are achieved by managing time and temperature during immersion, promising both fidelity and low cost of the process for large-scale integration.
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