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| Type |
Symposium |
| Area |
New Frontiers in Electrochemistry: Fundamentals and Applications |
| Room No. |
Room 407+408 |
| Time |
THU 15:40-16:10 |
| Code |
ELEC1-1 |
| Subject |
Diethoxydiethylsilane as a multi-functional organic additive for Ni-rich cathode materials |
| Authors |
Taeeun Yim
Department of Chemistry, Incheon National University, Korea |
| Abstract |
Lithium-ion batteries (LIBs) have received considerable attention as the most promising energy storage/conversion system from small- to large-scale devices such as electric vehicles and energy storage system. In this regard, Ni-rich NCM cathode materials (LiNixCoyMnzO2, x ≥ 0.6) have gained great attention as one of alternative cathode materials in conventional LIBs as they can afford high specific capacity, which allows high energy density of the cell. Nevertheless, poor surface stability of Ni-rich NCM cathode materials should be overcome because it triggers rapid fading of the cell. In this work, we propose silyl group functionalized organic material as 1) a functional additive in the electrolyte or 2) coating-precursor for Ni-rich NCM cathode material in order to decrease fluoride concentration in the cell which causes rapid fading of the cell. Because Si has a high binding affinity with fluoride species, we anticipate that use of DODSi in the cell greatly reduces concentration of fluoride species via chemical scavenging reaction. We confirm that DODSi effectively scavenges fluoride species in the cell via chemical reaction and it allows improved electrochemical performances for 100 cycles. |
| E-mail |
yte0102@inu.ac.kr |
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123rd General Meeting of the KCS