催化作用
硫黄
材料科学
电池(电)
阴极
Atom(片上系统)
纳米技术
锂(药物)
氧化还原
碳纤维
化学工程
化学
物理化学
有机化学
计算机科学
物理
医学
功率(物理)
量子力学
复合数
工程类
冶金
复合材料
嵌入式系统
内分泌学
作者
Tingting Sun,Fei Huang,Junliang Liu,Hao Yu,Xuezhen Feng,Xuefan Feng,Yu Yang,Hongbo Shu,Fuqin Zhang
标识
DOI:10.1002/adfm.202306049
摘要
Abstract Single‐atom catalysts (SACs) have been widely explored as additives to improve the performance of lithium–sulfur (Li–S) batteries, however, the design of highly catalytic and in‐depth knowledge of the structure–activity relationship of SACs remains a huge challenge. Herein, electron redistribution of the Co site by introducing the S atom to replace the N atom in the first coordination shell is theoretically predicted to enhance the anchoring capability of lithium polysulfides (LiPSs) and simultaneously facilitate the redox process of Li–S batteries, due to the strengthened d‐p orbital hybridization between sulfur species and SACs compared with the traditional CoN 4 architecture. Enlightened by theoretical analysis, asymmetric (N, S) coordinated Co single atoms embedded on N, S‐doped hierarchically porous carbon (S‐Co‐SACs/NSC) is precisely designed and constructed as a high‐efficiency fixity and catalyst for Li–S batteries. Therefore, the battery with S@S‐Co‐SACs/NSC cathode exhibits high areal capacity and cycling stability. This work highlights the vital function of the electronic structures of SACs in promoting the practical application of Li–S batteries.
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