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|
| Type |
Symposium |
| Area |
Current Trends in Electrochemistry for Energy Conversion |
| Room No. |
Room 201+202 |
| Time |
THU 15:10-: |
| Code |
ELEC1-5 |
| Subject |
Strategies for the development of dichalcogenide anode materials for advanced Na ion storage |
| Authors |
Yong-Mook Kang
Department of Energy and Materials Engineering, Dongguk University, Korea |
| Abstract |
Considering that the high capacity, long-term cycle
life, and high-rate capability of anode materials for sodium-ion
batteries (SIBs) is a bottleneck currently, a series of Co-doped
FeS2 solid solutions with different Co contents were prepared
by a facile solvothermal method, and for the first time their Nastorage
properties were investigated. The optimized Co0.5Fe0.5S2
(Fe0.5) has discharge capacities of 0.220 Ahg@1 after 5000
cycles at 2 Ag@1 and 0.172 Ahg@1 even at 20 Ag@1 with
compatible ether-based electrolyte in a voltage window of
0.8–2.9 V. The Fe0.5 sample transforms to layered
NaxCo0.5Fe0.5S2 by initial activation, and the layered structure
is maintained during following cycles. The redox reactions of
NaxCo0.5Fe0.5S2 are dominated by pseudocapacitive behavior,
leading to fast Na+ insertion/extraction and durable cycle life.
A Na3V2(PO4)3/Fe0.5 full cell was assembled, delivering an
initial capacity of 0.340 Ahg@1. |
| E-mail |
dake1234@dongguk.edu |
|
120th General Meeting of the KCS