Yedluri Anil Kumar, Kim Hee-Je
School of Electrical Engineering, Pusan National University Busandaehak-ro 63beon-gil, Geumjeong-gu Busan 46241 Republic of Korea
RSC Adv. 2019 Jan 9;9(2):1115-1122. doi: 10.1039/c8ra09081e. eCollection 2019 Jan 2.
Well-ordered, unique interconnected nanostructured binary metal oxides with lightweight, free-standing, and highly flexible nickel foam substrate electrodes have attracted tremendous research attention for high performance supercapacitor applications owing to the combination of the improved electrical conductivity and highly efficient electron and ion transport channels. In this study, a unique interconnected nanoplate-like nickel cobaltite (NiCoO) nanostructure was synthesized on highly conductive nickel foam and its use as a binder-free material in energy storage applications was assessed. The nanoplate-like NiCoO nanostructure electrode was prepared by a simple chemical bath deposition method under optimized conditions. The NiCoO electrode delivered an outstanding specific capacitance of 2791 F g at a current density of 5 A g in a KOH electrolyte in a three-electrode system as well as outstanding cycling stability with 99.1% retention after 3000 cycles at a current density of 7 A g. The as-synthesized NiCoO electrode had a maximum energy density of 63.8 W h kg and exhibited an outstanding high power density of approximately 654 W h kg. This paper reports a simple and cost-effective process for the synthesis of flexible high performance devices that may inspire new ideas for energy storage applications.
具有有序、独特互连纳米结构的二元金属氧化物与轻质、自支撑且高度灵活的泡沫镍基底电极相结合，由于其改善的导电性以及高效的电子和离子传输通道，在高性能超级电容器应用中引起了极大的研究关注。在本研究中，在高导电性泡沫镍上合成了一种独特的互连纳米片状钴酸镍（NiCoO）纳米结构，并评估了其在储能应用中作为无粘结剂材料的用途。通过简单的化学浴沉积法在优化条件下制备了纳米片状NiCoO纳米结构电极。在三电极体系的KOH电解液中，NiCoO电极在电流密度为5 A g时表现出2791 F g的出色比电容，以及在电流密度为7 A g下3000次循环后99.1%的保留率的出色循环稳定性。所合成的NiCoO电极具有63.8 W h kg的最大能量密度，并表现出约654 W h kg的出色高功率密度。本文报道了一种用于合成柔性高性能器件的简单且经济高效的工艺，这可能会激发储能应用的新思路。
