典型文献
Modulating eg orbitals through ligand engineering to boost the electrocatalytic activity of NiSe for advanced lithium-sulfur batteries
文献摘要：
Accelerating the sluggish redox kinetics of lithium polysulfides(LiPSs)by electrocatalysis is essential to achieve high performance lithium-sulfur(Li-S)batteries.However,the issue of insufficient catalytic activity remains to be addressed.Herein,a strategy of modulating eg orbitals through ligand engineering has been proposed to boost the catalytic activity of NiSe for rapid LiPSs redox conversion.The X-ray spec-troscopic measurements and theoretical calculations reveal that partial substitution of Se with N disrupts the octahedral coordination of Ni atoms in NiSe,leading to the reduced degeneracy and upward shift of eg orbitals of Ni 3d states.As a consequence,the bonding strength of N-substituted NiSe(N-NiSe)with LiPSs is enhanced,which facilitates the interfacial charge transfer kinetics and accelerates the LiPSs redox kinetics.Therefore,the Li-S batteries assembled with N-NiSe present a high capacity of 682.6 mAh g-1 at a high rate of 5 C and a high areal capacity of 6.5 mAh cm-2 at a high sulfur loading of 6 mg cm-2.This work provides a promising strategy to develop efficient transition-metal based electrocatalysts for Li-S batteries through eg orbital modulation.
文献关键词：
中图分类号：
作者姓名：
Tianran Yan;Jie Feng;Pan Zeng;Gang Zhao;Lei Wang;Cheng Yuan;Chen Cheng;Youyong Li;Liang Zhang
作者机构：
Institute of Functional Nano&Soft Materials(FUNSOM),Soochow University,Suzhou 215123,Jiangsu,China;Jiangsu Key Laboratory for Carbon-Based Functional Materials&Devices,Soochow University,Suzhou 215123,Jiangsu,China;Jiangsu Key Laboratory of Advanced Negative Carbon Technologies,Soochow University,Suzhou 215123,Jiangsu,China
文献出处：
引用格式：
[1]Tianran Yan;Jie Feng;Pan Zeng;Gang Zhao;Lei Wang;Cheng Yuan;Chen Cheng;Youyong Li;Liang Zhang-.Modulating eg orbitals through ligand engineering to boost the electrocatalytic activity of NiSe for advanced lithium-sulfur batteries)[J].能源化学,2022(11):317-323
A类：
NiSe
B类：
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AB值：
0.525439
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