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Type |
Poster Presentation |
Area |
Material Chemistry |
Room No. |
Exhibition Hall 2 |
Time |
4월 19일 (금요일) 11:00~12:30 |
Code |
MAT.P-469 |
Subject |
Development of Highly Stable P2-type Kx[Ni1/3Mn2/3]O2 Cathode with Excellent Rate Characteristics for Potassium Ion Batteries |
Authors |
Myoungho Pyo*, Dominic savio Muthu gnana theresa nathan1 Department of Printed Electronics Engineering, Suncheon National University, Korea 1Department of Printed Electronics Engineering, Sunchon National University, India |
Abstract |
Potassium ion batteries (KIBs) have gained great attention for energy storage devices owing to the elemental abundance and the lower reduction potential of potassium ions. Layered Na2/3[Ni1/3Mn2/3]O2 has been extensively studied as cathode material for sodium ion batteries (SIBs) due to its high theoretical capacity (173 mAh g-1). Both the P3- and P2-Na2/3[Ni1/3Mn2/3]O2 were investigated for sodium ion storage, among them the P2-Na2/3[Ni1/3Mn2/3]O2 exhibited better performance than P3 compound. Therefore, in the present work, we have made an attempt to synthesize P2-K2/3[Ni1/3Mn2/3]O2 by conventional solid state route but the P2 phase was not stabilized. Consequently, we prepared P2-type Kx[Ni1/3Mn2/3]O2 cathode material from Na2/3[Ni1/3Mn2/3]O2 by an electrochemical ion exchange process. The Kx[Ni1/3Mn2/3]O2 cathode delivered a specific discharge capacity of 81 mAh g-1 at a current rate of 0.5C. The material demonstrated good rate performance with 49 mAh g-1 at 15C. The cycling stability was also superior with 86% initial capacity retention after 250 cycles. The excellent cycling stability and rate performance could be attributed to the fast K+ diffusion through the 2D framework.
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E-mail |
dominicmuthu@gmail.com |
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