当前位置: X-MOL 学术ACS Appl. Energy Mater. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
In Situ Growth and Electrochemical Activation of Copper-Based Nickel–Cobalt Hydroxide for High-Performance Energy Storage Devices
ACS Applied Energy Materials ( IF 6.4 ) Pub Date : 2021-09-14 , DOI: 10.1021/acsaem.1c01662
Guichao Liu 1 , Xue-Zhi Song 1 , Yuechi Hao 2 , Zhifang Feng 1 , Ruiyuan Hu 1 , Xiaofeng Wang 3 , Yu-Lan Meng 1 , Zhenquan Tan 1, 2
Affiliation  

Herein, an effective electrochemical activation strategy is designed to enhance the overall energy storage performance of copper-based (Cu-based) nickel–cobalt hydroxide (NiCo–OH). The long-term cyclic voltammetry (CV) cycling process in an alkaline electrolyte triggered the in situ transformation from Cu-doped NiCo–OH (Cu/NiCo–OH) to electrochemically activated CuO-doped NiCo–OH (EA-CuO/NiCo–OH) on a porous Cu foam (CF) substrate, together with the significantly increased charge storage capacity. Benefiting from fast electron/ion transfer, abundant surface defects, and powerful synergistic effect contributed by the unique self-supported heterostructure, the EA-CuO/NiCo–OH electrode can achieve a high areal capacity of 4.186 C cm–2 under 5 mA cm–2, with excellent rate performance (67.5% of initial capacity under 50 mA cm–2) and long life span (84.8% of initial capacity after 5000 cycles). The as-fabricated EA-CuO/NiCo–OH//AC hybrid supercapacitor device shows a maximum energy density of 0.648 mW h cm–2 and an outstanding cycling stability (93.4% of initial capacity after 8000 cycles). The superior energy storage performance underpins the high potential of the reported electrochemical activation strategy for developing advanced Cu-based and bimetallic hydroxide-derived electrode materials.

中文翻译:

用于高性能储能装置的铜基镍钴氢氧化物的原位生长和电化学活化

在此,设计了一种有效的电化学活化策略来提高铜基(Cu-based)镍钴氢氧化物(NiCo-OH)的整体储能性能。碱性电解质中的长期循环伏安法 (CV) 循环过程触发了从 Cu 掺杂的 NiCo-OH (Cu/NiCo-OH) 到电化学活化的 CuO 掺杂的 NiCo-OH (EA-CuO/NiCo- OH) 在多孔铜泡沫 (CF) 基底上,同时显着增加了电荷存储容量。得益于快速的电子/离子转移、丰富的表面缺陷以及独特的自支撑异质结构带来的强大协同效应,EA-CuO/NiCo-OH 电极在 5 mA cm 下可实现 4.186 C cm –2的高面积容量–2,具有优异的倍率性能(50 mA cm –2下初始容量的 67.5% )和长寿命(5000 次循环后初始容量的 84.8%)。制造的 EA-CuO/NiCo-OH//AC 混合超级电容器装置显示出 0.648 mW h cm –2的最大能量密度和出色的循环稳定性(8000 次循环后初始容量的 93.4%)。卓越的储能性能支持了所报道的电化学活化策略在开发先进的基于铜和双金属氢氧化物衍生的电极材料方面的高潜力。
更新日期:2021-09-27
down
wechat
bug