Journal
JOURNAL OF COLLOID AND INTERFACE SCIENCE
Volume 595, Issue -, Pages 35-42Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2021.03.058
Keywords
1,3-Divinyltetramethyldisiloxane; Interface; Hydrogen fluoride; High voltage; Lithium metal batteries
Categories
Funding
- Program for Science & Technology Innovation Talents in Universities of Henan Province [20HASTIT010]
- Key Project of Science and Technology of Henan Educational Department [20B430009]
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This study introduces an organosilicon compound DTMDS as an electrolyte additive to enhance the performance of lithium metal batteries. The functional groups of siloxane and carbon-carbon double bonds can stabilize the battery performance and prolong its cycle life, providing valuable design references.
With the increasing demand for high-energy-density energy storage devices, lithium metal batteries have rekindled the interest of researchers due to ultra-high specific capacity. However, the extremely unstable interfaces between the electrolyte and electrodes limit its application seriously. Herein, we introduce an organosilicon compound, 1,3-Divinyltetramethyldisiloxane (DTMDS), as multifunctional electrolyte additive to enhance the performance of LiNi0.5Mn1.5O4/Li batteries. DTMDS contains two functional groups: siloxane groups (Si-O) and unsaturated carbon-carbon double bonds (C@C). Siloxane groups can capture hydrogen fluoride (HF) in electrolyte, and the carbon-carbon double bonds can form thin and dense passivation layer on both cathode and anode surfaces by polymerization. As a result, the capacity retention of the batteries can retain more than 95% after 500 cycles. This work provides a valuable reference for the design of multifunctional additives and stabilizing the interfaces of high-voltage lithium metal batteries. (C) 2021 Elsevier Inc. All rights reserved.
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