Lithiophilic single-atom Co on carbon nanosheets synergistically modulates Li deposition enable dendrite-free lithium metal batteries

Lithiophilic single-atom Co on carbon nanosheets synergistically modulates Li deposition enable dendrite-free lithium metal batteries

时间:2023-05-25浏览:10

Lithiophilic single-atom Co on carbon nanosheets synergistically modulates Li deposition enable dendrite-free lithium metal batteries

作者:Liang, ZW (Liang, Ziwei) [1] ; Peng, C (Peng, Chao) [2] ; Shen, JD (Shen, Jiadong) [1] ; Yang, Y (Yang, Yan) [1] ; Yao, SY (Yao, Shiyan) [1] ; Xue, DF (Xue, Dongfeng) [2] ; Zhu, M (Zhu, Min) [1] ; Liu, J (Liu, Jun) [1]

 (由 Clarivate 提供) 

卷556

文献号232474

DOI10.1016/j.jpowsour.2022.232474

出版时间FEB 1 2023

已索引2023-01-11

文献类型Article

摘要

Lithium metal batteries with proud energy density gained wide research interest in the past decades. Unfortu-nately, the uneven lithium deposition and the uncontrollable lithium dendrites growth leading to low coulombic efficiency and poor cycling stability remain unresolved. Herein, advanced approach via constructing 3D hier-archical single-atom Co anchored nitrogen carbon nanosheets-carbon fiber cloth (CC@CN-SACo) is reported that enables uniform Li deposition and offers high performance of Li metal batteries. The design of active single-atom in CC@CN-SACo achieves enhanced lithophilicity that effectively reduces the nucleation overpotential. Owing to the enlarge specific area and numerous lithophilic single atom Co sites, the current density is significantly reduced and the Li+ ion flux is uniformly distributed. Density functional theory calculations also reveal that the electron-delocalized sp2 hybridized 2D carbon plane between Co sites on the CN-SACo nanosheet and the active s (Li)-dz2/dxz(Co) interactions takes a pivotal role in improving Li deposition thermodynamics as well as the diffusion kinetics of Li+ and effectively modulates the deposition/stripping behavior of Li at lithium metal anode, thereby preventing the formation of Li dendrites. As a consequence, CC@CN-SACo@Li electrode assembled with Li foil delivers a superior cycling stability with 2000 h, 1400 h, and 500 h at 1 mA cm- 2/1mAh cm-2, 2 mA cm- 2/1mAh cm-2, and 5 mA cm- 2/5mAh cm-2, respectively. The full cells assembled with LiFePO4 achieve a capacity retention of 96.6% with 2 mg cm-2 LiFePO4 and 81% with N/P ratio of 5 at 1C is attained. Surprisingly, CC@CN-SACo@Li also presents superior performances with 718.4 mAh g-1 reversible capacity after 300 cycles when applied in lithium-sulfur batteries, suggesting its universality for different high-energy batteries.


关键词

作者关键词Single -atom CoDensity functional interactionDepositionDiffusion kineticsDendrites -free lithium metal

Keywords PlusGRAPHENECATALYSTSANODEHOST

作者信息

通讯作者地址

Liu, Jun

(通讯作者)

South China Univ Technol, Sch Mat Sci & Engn, Guangdong Prov Key Lab Adv Energy Storage Mat, Guangzhou 510641, Peoples R China

所属机构

South China University of Technology

通讯作者地址

Peng, Chao

(通讯作者)

Chinese Acad Sci, Shenzhen Inst Adv Technol, Multiscale Crystal Mat Res Ctr, Shenzhen 518055, Peoples R China

地址

1 South China Univ Technol, Sch Mat Sci & Engn, Guangdong Prov Key Lab Adv Energy Storage Mat, Guangzhou 510641, Peoples R China

2 Chinese Acad Sci, Shenzhen Inst Adv Technol, Multiscale Crystal Mat Res Ctr, Shenzhen 518055, Peoples R China

电子邮件地址chao.peng@siat.ac.cnmsjliu@scut.edu.cn

类别/分类

研究方向ChemistryElectrochemistryEnergy & FuelsMaterials Science

引文主题

2 Chemistry

2.62 Electrochemistry

2.62.616 Lithium-Sulfur Batteries

Sustainable Development Goals

11 Sustainable Cities and Communities

Web of Science 类别Chemistry, PhysicalElectrochemistryEnergy & FuelsMaterials Science, Multidisciplinary