In:
Small, Wiley, Vol. 14, No. 50 ( 2018-12)
Abstract:
The emerging phosphate species on the surface or near‐surface of electrode materials are versatile and have an intriguing ability for dramatically enhanced electrochemical performance. Unfortunately, the distribution/dispersion of phosphate species still keeps at levels on the exterior not within the interior surface of materials, and the micro‐/nanoscale tuning is commonly rarely concerned and its function remains poorly understood. Herein, for the first time, well‐dispersed phosphate species up to 70% mass ratio implanted within Ni‐doped CoP nanowire matrix are presented via an efficient low‐temperature phosphorization strategy. The resultant nanohybrids possess kinetics‐favorable open frameworks with abundant mesopores and a high degree covalency in the chemical bonds, thus leading to rapid mass transport/charge transfer and enhanced redox reaction kinetics. Remarkably, the phosphate species feature superwettability toward water and strong affinity for OH − in the electrolyte, evidenced by the shortened distance and reduced adsorption energy between the OH − and the nuclear Co atoms on the nanohybrids as revealed by density functional theory calculations. As such, the nanohybrids exhibit an ultrahigh specific capacity of 250 mAh g −1 even at 50 A g −1 . This work presents a deeper understanding of the dispersion and role of phosphate species for supercapacitors and other energy‐related storage/conversion devices.
Type of Medium:
Online Resource
ISSN:
1613-6810
,
1613-6829
DOI:
10.1002/smll.201803811
Language:
English
Publisher:
Wiley
Publication Date:
2018
detail.hit.zdb_id:
2168935-0