Cu single atoms regulating nitrogen active-sites of g-C3N4 for sodium ion storage

Liu, Guiyu1; Yuan, Huimin1; Wang, Zhiqiang1; Qin, Ning1; Huang, Yongcong1; Cao, Yulin1; Li, Yingzhi1; Lu, Wang1; Zeng, Chun1; Liu, Quanbing2; Lu, Zhouguang1

2024-08-01

10.1016/j.ensm.2024.103608

ENERGY STORAGE MATERIALS   影响因子和分区

2405-8297

2405-8289

Nitrogen-rich material of graphitic carbon nitride (g-C3N4) with cost-effectiveness and easy accessibility has been considered as one of the most promising anode materials for sodium ion batteries (SIBs). However, the excessive presence of non-stable nitrogen sites in low crystallinity carbon nitrides would result in significant irreversibility, inadequate ion conductivity and structural instability, thereby limiting its practical application. Herein, a novel low-temperature strategy is proposed to stabilize the g-C3N4 by modulating the nitrogen configuration with single-atoms copper. The formed copper single atoms serving as anchors effectively regulate the coordination environment of nitrogen atoms in carbon nitride, thereby constructing stable nitrogen active sites for Na+ storage and conductive networks for rapid Na+ transport. Therefore, the Cu1.0/NC exhibits superior capacity (350.4 mAh g- 1 at 50 mA g- 1), exceptional rate performance (252.3 mAh g- 1 at 1000 mA g- 1), and long-cycle stability (capacity retention rate of 80.3 % after 1000 cycles at 5A g- 1). Furthermore, in-situ Raman, ex-situ XANES and XPS technologies jointly reveal that the Cu atoms significantly influence the charge transfer process of Na+ and change the storage mode of sodium through redox effects during the sodiation/desodiation process. This work proves that single-atom engineering is a novel and feasible strategy to optimize the high-performance electrode materials for rechargeable batteries.

Carbon nitride Controllable nitrogen configuration Single-atom copper Sodium-ion batteries anodes Redox effects

SCI ; EI

英语

第一 ; 通讯

National Natural Science Foundation of China[U22A20439] ; Basic Research Project of the Science and Technology Innovation Commission of Shenzhen[JCYJ20220818100418040] ; Shenzhen Key Laboratory of Interfacial Science and Engineering of Materials[ZDSYS20200421111401738] ; Guangdong Basic and Applied Basic Research[2023A1515010035]

Chemistry ; Science & Technology - Other Topics ; Materials Science

Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary

WOS:001267277100001

ELSEVIER

20242816683747

Anodes ; Atoms ; Carbon nitride ; Charge transfer ; Copper ; Cost effectiveness ; Crystallinity ; Metal ions ; Storage (materials) ; Temperature

Metallurgy:531.1 ; Copper:544.1 ; Thermodynamics:641.1 ; Storage:694.4 ; Secondary Batteries:702.1.2 ; Electron Tubes:714.1 ; Chemical Reactions:802.2 ; Industrial Economics:911.2 ; Atomic and Molecular Physics:931.3 ; Crystalline Solids:933.1

Web of Science

1.Southern Univ Sci & Technol, Dept Mat Sci & Engn, Shenzhen Key Lab Interfacial Sci & Engn Mat, Shenzhen 518055, Peoples R China
2.Guangdong Univ Technol, Sch Chem Engn & Light Ind, Guangzhou 510006, Peoples R China

Liu, Guiyu,Yuan, Huimin,Wang, Zhiqiang,et al. Cu single atoms regulating nitrogen active-sites of g-C3N4 for sodium ion storage[J]. ENERGY STORAGE MATERIALS,2024,71.

Liu, Guiyu.,Yuan, Huimin.,Wang, Zhiqiang.,Qin, Ning.,Huang, Yongcong.,...&Lu, Zhouguang.(2024).Cu single atoms regulating nitrogen active-sites of g-C3N4 for sodium ion storage.ENERGY STORAGE MATERIALS,71.

Liu, Guiyu,et al."Cu single atoms regulating nitrogen active-sites of g-C3N4 for sodium ion storage".ENERGY STORAGE MATERIALS 71(2024).