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