|
Type |
Poster Presentation |
Area |
Physical Chemistry |
Room No. |
Grand Ballroom |
Time |
10월 19일 (금요일) 11:00~12:30 |
Code |
PHYS.P-217 |
Subject |
Effect of Co on Ni(OH)2 Layered Double Hydroxide Nanosheets as High Charge Rate Capability and High Energy Density Storage Material in Ni-Zn Battery |
Authors |
Madhusudana Gopannagari, Amaranatha Reddy, Kiyoung Kwon1, EunHwa Kim, Hyun Deog Yoo*, TaeKyu Kim* Department of Chemistry, Pusan National University, Korea 1department of chemistry, pusan national university, Korea |
Abstract |
Improving the charge capacity, electrochemical reversibility and stability of anode materials are main challenges for the development of Ni-based rechargeable batteries and devices. The combination of cobalt and electrode material nanostructuration revealed a very promising approach for this purpose. Here we employed the controllable synthesis of nanosheet type NiCo LDH by electrodeposition method. The effect of concentration rate of Ni-to-Co preparation solution on crystalline structure, morphology, and supercapacitive performance was investigated systematically. Experimental found that the morphology and composition of NiCo LDH was highly depend on the Ni2+/Co2+ molar ratios and the obtained Ni0.9Co0.1 LDH materials showed small nanosheet size and uniform distribution on carbon fiber electrode. Ni0.9Co0.1 LDH electrode was evaluated for half-cell battery application, which revealed a high specific capacity of 278 mAh. g-1 at C/5 charge rate and a good cycle stability, retaining 80% of the initial capacitance after 120 charge and discharge cycles at 1C charge rate. Moreover, the Ni0.9Co0.1 LDH electrode exhibits a high energy density of 228 Wh Kg-1 at a power density of 55.6 W Kg-1 and a high power density of 1020 W Kg-1 at energy density of 135.5 Wh Kg-1 within a 1.63 V of Ni0.9Co0.1-Zn battery. |
E-mail |
mr.madhu20@gmail.com |
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