122nd General Meeting of the KCS

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