Won, Jung Ha Lee, Hae Soo Hamenu, Louis Latifatu, Mohammed Lee, Yong Min Kim, Kwang Man Oh, Jemyung Il Cho, Won Ko, Jang Myoun 2024-01-20T04:04:43Z 2024-01-20T04:04:43Z 2022-01-25 2016-05 1226-086X https://pubs.kist.re.kr/handle/201004/124096 In this work, poly[dimethylsiloxane-co-(siloxane-g-acrylate)] (PDMS-A) and lithium-modified silica nanosalt (Li202) are used together as low-temperature electrolyte additives in lithium-ion batteries (LIBs), taking advantage of the electrochemical and interfacial stabilities due to their surface functional groups. Using these additives together improves the electrochemical stability and ionic conductivity of liquid electrolyte solution to over 5.5 V and 4 x 10(-4) S cm(-1) at -20 degrees C, respectively. The room temperature electrochemical performance of a conventional LIB (LiCoO2/graphite) is improved by the addition (e.g., initial discharge capacity of 95.9 mAh g(-1) obtained after charging at 1.0 C-rate and consequent discharging at 5.0 Crate). The low-temperature performance is also enhanced, achieving a capacity retention ratio of 63.4% after 50 cycles at -20 degrees C, compared to 38.7% without the additives. It is also notable that the PDMS unit commonly existing in both additives may be the main cause of the synergistic effects on the electrochemical performance due to the compatibility between PDMS-A and Li202. (C) 2016 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved. English ELSEVIER SCIENCE INC Improvement of low-temperature performance by adopting polydimethylsiloxane-g-polyacrylate and lithium-modified silica nanosalt as electrolyte additives in lithium-ion batteries Article 10.1016/j.jiec.2016.03.045 1 JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY, v.37, pp.325 - 329 JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY 37 325 329 N scie scopus kci ART002110966 000377737100042 2-s2.0-84979724552 Chemistry, Multidisciplinary Engineering, Chemical Chemistry Engineering Article OXIDE Polydimethylsiloxane additive Lithium-silica nanosalt Electrolyte additives Low-temperature performance Lithium-ion battery