Single-Atom Catalyst Induced Amorphous Li2O2 Layer Enduring Lithium-Oxygen Batteries with High Capacity

被引：5

作者：

Mohamed, Zeinab ^{[1
]}

Zhou, Quan ^{[1
]}

Zhu, Kefu ^{[1
]}

Zhang, Guoliang ^{[2
]}

Xu, Wenjie ^{[1
]}

Chimtali, Peter Joseph ^{[1
]}

Cao, Yuyang ^{[1
]}

Xu, HanChen ^{[1
]}

Yan, Ziwei ^{[1
]}

Wang, Yixiu ^{[1
]}

Akhtar, Hassan ^{[1
]}

Al-Mahgari, Aad ^{[1
]}

Wu, Xiaojun ^{[3
]}

Wang, Changda ^{[1
]}

Song, Li ^{[1
]}

机构：

[1] Univ Sci & Technol China, Sch Nucl Sci & Technol, Natl Synchrotron Radiat Lab, Key Lab Precis & Intelligent Chem, Hefei 230029, Anhui, Peoples R China

[2] Shandong Univ, Key Lab Liquid Solid Struct Evolut & Proc Mat, Minist Educ, 17923 Jingshi Rd, Jinan 250061, Peoples R China

[3] Univ Sci & Technol China, Sch Chem & Mat Sci, Hefei 230029, Anhui, Peoples R China

来源：

ADVANCED FUNCTIONAL MATERIALS | 2025年 / 35卷 / 01期

基金：

国家重点研发计划;

关键词：

amorphous Li2O2 film; lithium-oxygen batteries; nonprecious metal; single-atom catalyst; CARBON NANOSHEETS; POROUS CARBON; LI-O-2; SITES;

D O I：

10.1002/adfm.202410091

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Aprotic lithium-oxygen batteries (LOBs) may deliver exceptionally high energy density but struggle to attain rapid reversibility and substantial capacity simultaneously, due to typical surface or solution-formed insulating solid Li2O2. Tuning the structure of Li2O2 to create a large-area amorphous layer on the cathode is predicted to overcome the multiperformance limitations. Here, an isolated nickel single atom to nitrogen-doped graphene as a cathode catalyst (NiNG SAC) for LOBs is presented via a green click-trapping strategy. Derived from the maximized exposure of atomic active sites of the cathode, the formation/decomposition mechanisms of Li2O2 are tailored, and a large area of thin Li2O2 amorphous film is achieved. The structure and functions of NiNG SAC are explored by theoretical computation and synchrotron radiational investigation. Consequently, the abundant NiN4 sites enhance redox kinetics and stand out to deliver an impressive specific discharge/charge capacity of 24 248/17 656 mAh g(-1) at 200 mA g(-1), together with a long cycle life of over 500 cycles. This study contributes helpful insights to achieve high-capacity LOBs with long lifespans, by constructing unique single-atom catalysts to optimize the formation of amorphous discharge Li2O2 products.

引用

页数：11