TY - JOUR
T1 - Enhanced Electrochemical Kinetics on Ni2P Polar Mediators Integrated with Graphene for Lithium–Sulfur Batteries
AU - Cheng, Junhan
AU - Gao, Song
AU - Zhao, Dan
AU - Rooney, David
AU - Zhang, Naiqing
AU - Sun, Kening
N1 - Publisher Copyright:
© 2022 The Authors. Advanced Materials Interfaces published by Wiley-VCH GmbH.
PY - 2022/4/22
Y1 - 2022/4/22
N2 - Lithium-sulfur batteries have evoked intensive attention caused by the urgent requirement of energy storage devices with higher energy density, long cycle life, and low cost. However, the insulating nature and the soluble reaction intermediate products still hinder its large-scale industry and acceptance by the market. Tremendous efforts focus on the composite of polar material and non-polar material to solve the weaknesses of material insulating nature and soluble reaction intermediate products. However, the linkage form between these two generic materials has been ignored. In this paper, by using typical Ni2P as polar material and graphene as non-polar material, the reaction kinetics changes and its intrinsic theories on behavior enhancement have been proved, which construct different binding type between polar and non-polar materials. The Ni2P/PrGO delivers an improved high specific capacity of 1254.6 mAh g-1 than Ni2P/rGO at 0.2 C. The relevant X-ray photoelectron spectroscopy result and the in situ electrochemical impedance spectroscopy tests prove that the linkage state between polar and non-polar material has strong influence on the sulfur cathode reaction kinetics. The enhanced reaction kinetics and polar adsorption behavior bring the soft pack battery testing unit over 150 stable cycles with decay ratio of 0.19% for each cycle.
AB - Lithium-sulfur batteries have evoked intensive attention caused by the urgent requirement of energy storage devices with higher energy density, long cycle life, and low cost. However, the insulating nature and the soluble reaction intermediate products still hinder its large-scale industry and acceptance by the market. Tremendous efforts focus on the composite of polar material and non-polar material to solve the weaknesses of material insulating nature and soluble reaction intermediate products. However, the linkage form between these two generic materials has been ignored. In this paper, by using typical Ni2P as polar material and graphene as non-polar material, the reaction kinetics changes and its intrinsic theories on behavior enhancement have been proved, which construct different binding type between polar and non-polar materials. The Ni2P/PrGO delivers an improved high specific capacity of 1254.6 mAh g-1 than Ni2P/rGO at 0.2 C. The relevant X-ray photoelectron spectroscopy result and the in situ electrochemical impedance spectroscopy tests prove that the linkage state between polar and non-polar material has strong influence on the sulfur cathode reaction kinetics. The enhanced reaction kinetics and polar adsorption behavior bring the soft pack battery testing unit over 150 stable cycles with decay ratio of 0.19% for each cycle.
KW - Ni P
KW - binding structure
KW - electrochemical reaction kinetics, graphene
KW - lithium–sulfur battery
UR - http://www.scopus.com/inward/record.url?scp=85125191809&partnerID=8YFLogxK
U2 - 10.1002/admi.202102142
DO - 10.1002/admi.202102142
M3 - Article
AN - SCOPUS:85125191809
SN - 2196-7350
VL - 9
JO - Advanced Materials Interfaces
JF - Advanced Materials Interfaces
IS - 12
M1 - 2102142
ER -